1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

NP435 to M5R2 swap - 1986 4.9 2wd

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  #1  
Old 12-18-2012, 10:49 AM
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NP435 to M5R2 swap - 1986 4.9 2wd

Just completed a swap of a NP435 (grannie gear 4 speed) for a M5R2 (overdrive 5 speed) in my '86 F-150. Thought that I'd give a quick run down of what is needed in case anyone else is interested in doing the same.

Truck is a '86 F-150 base truck. 4.9 six, 2wd, with a NP435 trans.

I picked up a M5r2 out of a '95 F-150 for the swap.

Obvious first things. Block up the truck so that you can get easy access underneath. I have a downward sloping driveway, so I put car ramps at the bottom of the driveway and ran the truck down the driveway onto the ramps. This effectively raised the entire truck for easy access underneath. Safely block the wheels etc and use the emergency brake obviously.

Drain the 4 speed oil first. Disconnect the driveline from the diff and pull it out of the back of the trans. I blocked underneath the engine oil pan, but with the six, by the time you take the gawdawfully heavy NP off the back end, it sits even and the blocking wasn't necessary.

Put a jack under the tailshaft on the trans and remove the cross member. Because of my exhaust system (2 1/4" true duals) I wasn't able to remove the top brace from the cross member on the right side. Pull the sheetmetal flywheel cover off the trans and remove four bolts that hold the trans to the bellhousing. Be careful, cuz this thing weighs a ton. Remove the old trans and then remove the bellhousing. You need to remove the starter also. I replaced the clutch disc and pressure plate and cleaned and sanded the flywheel. Could have had it resurfaced, but it looked pretty good and I wanted to finish the project in one day (truck is a DD). Pulled the flywheel and replaced the rear main seal. then started putting everything back together.

My trans came with the hydraulic MC, line and slave cylinder. I didn't buy a new slave assembly, but you might want to consider it. Once the trans is in place, if you need to replace it, you have to pull the trans again.

flywheel, clutch disc and pressure plate back in place, I installed the new trans. I had already pulled the interior rubber floor mat and removed the access panel above the trans.

The existing rear cross member will work, but it needs to be moved back about 4 inches. Once the trans was in place, I bolted the crossmember to the trans mount (my new trans came with a mount, so I didn't try and reuse or even compare the new one to the existing one). Then I jacked the tail of the trans up so that I could mark the holes in the frame to bolt the relocated crossmember back in place. had to remove the trans mount to get everything back in place again, but it was normal stuff. I did not reuse the upper braces on the crossmember. As mentioned earlier, I couldn't get the passenger side one off without removing my exhaust. And I couldn't get the two upper bolts out on the left one without jacking up the cab, so I just put the nuts back on and tightened them up so that they wouldn't rattle around. The new trans is so much lighter than the old one, I can't imagine that the stock crossmember without the additional braces won't be sufficient.

My truck is a short bed and I got the driveline and the access panel from the donor truck also. Turns out that the driveline is the same length as the one that came with the NP435, but the front yoke that slides into the trans is different. To complicate things a bit, the rear flange on the '95 driveline was different than the one on my '86, so it was a mix and match affair. What I ended up doing was using the '95 driveline. I removed the rear flange on the driveline and used the larger U joint caps off the '86 driveline and everything bolted back together fine.

I put the '95 MC in place of the '86 one since the unit was still connected to the slave with a new line. Had to open up the hole in the firewall slightly to get it to fit. But other than that it was a bolt in deal. Unfortunately the damned thing didn't work, so I ended up putting the working '86 MC back in place. If you need to do this, there is a split pin that holds the pressure line into the MC, once you push this out, the line will come loose. You probably need the line for the newer trans as the slave cylinder arrangement at the trans is different. The line from the '86 hydraulic assembly will not fit the newer slave cylinder.

In the cab, I ended up reusing the access panel that came with the '86. Either one would have worked, but they are slightly different profiles. Reason that I used the '86 one is because the shift boot on my NP435 was in better condition than the one that came with the newer trans and they are not the same bolt pattern where they bolt to the access panel.

So, anyway, that's about it. Finished virtually everything in one day, but because of the faulty MC, which I replaced last night, the truck was out of commission for an extra day or two. Got everything swapped over last night and the truck is running and shifting. Did not drive it yet as I still need to reinstall the access panel, floormat and interior panels.

Eventually I will need to pull the tail shaft off this trans and replace it with one that has a hole for the speedo gear. I wanted to see how the gearing worked first before I purchased the necessary drive and driven gears for the trans. Based upon research here and other places, it seems that the tail shafts can be swapped between the earlier and later M5R2 trans to allow use of a cable driven speedo. The reluctor gear on the newer trans can be removed and replaced with speedo gears. Haven't crossed the bridge yet though.

Looking forward to buttoning everything up tonight and driving the truck tomorrow.

based upon published internal gear ratios, I may be able to go with slightly taller rear end gears and have the same effective first gear ratio, which will essentially end up with a double overdrive compared to the grannie gear trans.

TR
 
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Old 12-18-2012, 12:12 PM
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I will be interested in how it drives. I did basically the same to an 83 F100. I put a M5R2 in behind a 302. Shifts and runs great if you want to drive 65-70mph. Hard to get anything faster out of it. I am not sure what gears are in the rear. They are stock. The truck originally had a 232 V6 with a SROD trans. Going to have to do some investigating. Do you know what gears I should be running?
 
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Old 12-18-2012, 12:23 PM
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Thank you for the writeup! Please let us know how it drives when you'll have the chance to test it.
 
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Old 12-18-2012, 12:27 PM
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On the topic of rear end gears, what I did was put together a spreadsheet that multiplied the internal trans ratios times the final drive ratio to end up with a final gear ratio for each gear. I figured that I could go from what I think are 3.55 rear gears to something in the 3.00 to 3.25 range and end up with similar first gear ratios. Right now with the NP435 and 3.55 rear gears, I have a 11.86 ratio in first gear. With the M5R2, I am at 13.31 for first gear. Given that the first gear with the NP was relatively short for my use (DD street truck with light duty hauling) I can go to 3.08 gears and get a 11.55 first gear or to 3.00 gears and still be at 11.25. With the .75 OD fifth gear, and 3.00 gears, my final ratio will be 2.25 compared to the prior 3.55 with the NP. This is effectively double OD compared to the current set up.

Dunno. We'll see how things work. You already had an OD trans in yours, so your difference won't be as dramatic.

TR

<TABLE style="WIDTH: 371pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=497><COLGROUP><COL style="WIDTH: 53pt" span=7 width=71><TBODY><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63 height=20 width=71></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl65 width=71>M5R2 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl66 width=71></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl66 width=71>3.55 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl66 width=71>3.08 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl66 width=71>3.00 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid" class=xl67 width=71>2.75 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63 height=20></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl69></TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76 height=20>1 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>3.75 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>13.31 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>11.55 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>11.25 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>10.31 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76 height=20>2 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>2.32 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>0.62 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>8.24 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>7.15 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>6.96 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>6.38 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76 height=20>3 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>1.43 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>0.62 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>5.08 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>4.40 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>4.29 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>3.93 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76 height=20>4 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>1.00 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>0.70 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>3.55 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>3.08 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>3.00 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>2.75 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76 height=20>5 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>0.75 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>0.75 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl63>2.66 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>2.31 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl74>2.25 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>2.06 </TD></TR><TR style="HEIGHT: 16pt" height=21><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 16pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl64 height=21>Reverse </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl71>3.41 </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl72></TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl72>12.11 </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl75>10.50 </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl75>10.23 </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl73>9.38 </TD></TR></TBODY></TABLE>


<TABLE style="WIDTH: 212pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=284><COLGROUP><COL style="WIDTH: 53pt" span=4 width=71><TBODY><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65 height=20 width=71></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl73 width=71></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #f0f0f0" class=xl67 width=71></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 53pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid" class=xl74 width=71>Current </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65 height=20></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl75>NP-435 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl69>3.55 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65 height=20></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl69></TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl77 height=20>1 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>6.68 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl69>23.71 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl77 height=20>2 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>3.34 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65>0.50 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>11.86 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl77 height=20>3 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>1.74 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65>0.52 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>6.18 </TD></TR><TR style="HEIGHT: 15.35pt" height=20><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 15.35pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl77 height=20>4 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68>1.00 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65>0.57 </TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl70>3.55 </TD></TR><TR style="HEIGHT: 16pt" height=21><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; HEIGHT: 16pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl66 height=21>Reverse </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl76>8.26 </TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl71></TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: yellow; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid" class=xl72>29.32 </TD></TR></TBODY></TABLE>
 
  #5  
Old 12-18-2012, 01:08 PM
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Look at the final drive ratios for the truck if you keep the 3.55 gears. With my NP435 and 3.08 gears, my FDR is 3.08, and it'll cruise at 2000 rpm at 60. With a FDR of 2.66, you're cruising at 1730 rpm at the same speed. This means that your truck will cruise well at 60.

Stick with the 3.55 gears. In fact, with your transmission, you could do with 4.10's if you wanted to. 3.55 is a great set of gears for a 300 that isn't running a granny-4 speed. 3.27 is the minimum I would go. You also said you're running true 2 1/4'' dual exhaust, which is also part of my reasoning. I assume you've changed the carburetor and did a DSII swap too?

The reason being, with 3.55 or 3.27 gears, you don't lose all of your low end torque and make the truck a dog. If you ever have to haul anything, you'll be glad you didn't go with 3.08 (8.8'' rear) or 3.00 (9'' rear) gears. Keep your cruising speed at 55 to 62 and you'll be very satisfied with how the 300 does. Remember, a 300 makes all of its power in a lower rpm range than the 302. It'll also extend the life of your clutch a decent bit if you keep the lower gears, as it's easier to start off.
 
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Old 12-18-2012, 02:00 PM
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Originally Posted by 1983F1503004x4
Look at the final drive ratios for the truck if you keep the 3.55 gears. With my NP435 and 3.08 gears, my FDR is 3.08, and it'll cruise at 2000 rpm at 60. With a FDR of 2.66, you're cruising at 1730 rpm at the same speed. This means that your truck will cruise well at 60.

Stick with the 3.55 gears. In fact, with your transmission, you could do with 4.10's if you wanted to. 3.55 is a great set of gears for a 300 that isn't running a granny-4 speed. 3.27 is the minimum I would go. You also said you're running true 2 1/4'' dual exhaust, which is also part of my reasoning. I assume you've changed the carburetor and did a DSII swap too?

The reason being, with 3.55 or 3.27 gears, you don't lose all of your low end torque and make the truck a dog. If you ever have to haul anything, you'll be glad you didn't go with 3.08 (8.8'' rear) or 3.00 (9'' rear) gears. Keep your cruising speed at 55 to 62 and you'll be very satisfied with how the 300 does. Remember, a 300 makes all of its power in a lower rpm range than the 302. It'll also extend the life of your clutch a decent bit if you keep the lower gears, as it's easier to start off.

Thanks for the tips, but cruising at 55-62 drives me nuts...

TR
 
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Old 12-18-2012, 04:55 PM
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Originally Posted by Triffecpa
Thanks for the tips, but cruising at 55-62 drives me nuts...

TR
Don't ride with me or behind me then! 5mph under the speed limit wherever I go, and the gas mileage is GOOOOOD.
 
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Old 12-18-2012, 08:06 PM
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Originally Posted by 1983F1503004x4
Don't ride with me or behind me then! 5mph under the speed limit wherever I go, and the gas mileage is GOOOOOD.
Well, rest assured that I won't be behind you for long...

TR
 
  #9  
Old 12-18-2012, 08:13 PM
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I would make bolting in the upper crossmembers a future project that needs to be done. The crossmember not only supports the tranny, but also supports the frame like all the others do down through the length of the truck. The upper ones keep the frame from trying to twist and holds it in a vertical position.
 
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Old 12-18-2012, 09:56 PM
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Don't forget also, the 1995 tranny will not have a speedo cable hole, those had fully electronic speedos reading off the rear end sensor.



And I hope you don't tow with that truck, because you will absolutely HATE the super tall Reverse gear if you have to back a trailer up.



I truly hate my '94 F150 M5OD, but me it's not as bad as it's 4x4, so if I did need to back a trailer up, I'd throw it in 4 LO.


If you didn't already have the tranny, I'd suggest to find a ZF5. Well worth the effort to find.


But since you already have that M5OD, heres a couple things you NEED to do to it BEFORE installing it in the truck!


The number 1 cause of failure of these trannys is running out, or to low on oil. THat happens because on top of the tranny shift tower, there is 3 rubber plugs. With time age and mileage, those rubber plugs shrink, and leak, and only leak as you drive, so you will not see a puddle under the truck where it's parked.


Heres some further details on that,

M5OD Mazda Design Manual Five Speed Transmission Preventative Measure .: Articles

And heres where the plugs are, they are accessible with the tranny in the truck, by removing your floor carpet, and removing the tranny hump cover. But since you have the transmission in your hands, might as well do it now! they're the 3 round plugs you see, facing the back.





But you will like the OD, mine cruises nicely at 1500RPM at 90km/h (55mph), and 1700RPM at 100km/h (62mph) witch is the fastest I ever go with it.

 
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Old 12-19-2012, 08:18 AM
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I forgot to say, thanks for taking the time to post that info, a lot of people will be looking at it. We are tied pretty close with google, so your post will come up when someone does a web search for a tranny swap like yours.
 
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Old 12-19-2012, 09:54 AM
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DieselJohn

Thanks for the tips. I did research the trans quite a bit before I picked this one up. I was aware of the "three plug" issue. My trans already had evidence of high temp silicone on those plugs, so the prior owner must have already addressed it. I had no interest in the ZF trans cuz I don't use my truck for heavy work. I pull a small 5x8 utility trailer with two or three motorcycles in it, but that's the extent of the "work" that the old girl has to do these days. When I got the truck it had lots of evidence of hard work in a prior life. It's now just a light duty street truck.

I must say though that after driving the truck for the first time today I am smitten with the new trans. It might not be a T5 as far as smoothness goes, but it's not far behind and it's eons ahead of the NP that came out. And I haven't even put the shift **** back in place yet.

For me, and for my use, it's a huge improvement.

I'll drive it for awhile before I contemplate the rear end gears. Got more pressing things to work on in the meantime.

TR
 
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Old 12-19-2012, 01:47 PM
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That's great everything worked out for you!
 
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Old 12-19-2012, 04:30 PM
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Originally Posted by IDIDieselJohn
......And I hope you don't tow with that truck, because you will absolutely HATE the super tall Reverse gear if you have to back a trailer up.



I truly hate my '94 F150 M5OD, but me it's not as bad as it's 4x4, so if I did need to back a trailer up, I'd throw it in 4 LO.


If you didn't already have the tranny, I'd suggest to find a ZF5. Well worth the effort to find.
The zf has the high speed reverse problem also(at least the diesel trans does). It must be something with these 5 speed designs, I am not up too much on the insides of the trannies. It is aggravating backing up with a trailer, but I have to admit it's perfect for going forward and backward plowing snow.
 
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Old 01-02-2013, 12:35 PM
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So, I've driven the truck for a couple of weeks now. Huge improvement. The nice thing about the extra gear stuck in there is that you can drive the truck between 1100 and 2500 RPMs and not have to over rev it to shift to the next gear. that and the fact that the 5 speed shifts much more easily than the 4 speeder and it has totally transformed the driving experience. Prior to this I wasn't sure that I was going to retain the six cylinder motor. But this makes it easy to keep it in the heart of the torque curve without having to rev it too high. I may still change to slightly higher rear end gears at some point as I think that the first gear ratio and over all engine power band will work well with slightly taller gears, but for now I'm very happy with the swap.

TR
 


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