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May 18, 2010 | 06:01 PM

jaybob1807

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gear recommendations

Could someone please recommend some new gears for my truck? I have a 95 f150 5.8l with the e40d trans. if im not mistaken and will be going to 32 in. tires. I do not want the motor to be bogged down but i down want it to low because i take it down the interstate also. Right now i am running 265 75 15's and it seems like im in 2nd gear for ever. thanks guys.
Thanks,
Jay

May 18, 2010 | 06:09 PM

lew52

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I would go 4.10 with that tire size if you do alot of highway driving ...Lew

May 18, 2010 | 09:37 PM

jaybob1807

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Is there another choice somewhere between whatever is in there now and 4.10? That just seems really aggressive. I am just curious and not soubting you Lew.
Thanks

May 19, 2010 | 04:38 AM

lew52

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I like the lower gears , you could go 3.73 , whats in it now ?? ..

May 19, 2010 | 07:07 AM

jaybob1807

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whatever it comes with from the factory is whats in there for gears now. How do I find out what gears are in my truck? It's a 95 f150 single cab with the 5.8l auto trans I think its the e40d(not sure). Right now it seems like im in 2nd gear from 20mph to 70 with 265-75-15's on it.

May 19, 2010 | 07:19 AM

lew52

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There should be a tag on the rear end cover or a code on the door jam sticker...

May 19, 2010 | 07:53 AM

Conanski

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From: Ottawa, Ontario

4.10's are what you need, that will put the engine at almost the exact same rpm at 70mph as it would have been with stock sized tires and 3.55 gears... which was the most common ratio in thse trucks and the one that best suits the 5.8 for general use.

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May 19, 2010 | 07:51 PM

Cobhc530177

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So I have an 89 F250 with the I6 and a ZF 5 speed, as is its bone stock, im putting 33's on it soon and what would be good gears for it? I go 70mph on a daily basis

May 19, 2010 | 09:16 PM

#10

mud troopers

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Jaybob1807, the tires will great on the stock rims, and performance will not be any different. One place that I would recommend is 4x4GroupBuy.com.

May 19, 2010 | 10:18 PM

#11

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by Cobhc530177

So I have an 89 F250 with the I6 and a ZF 5 speed, as is its bone stock, im putting 33's on it soon and what would be good gears for it? I go 70mph on a daily basis

Here's what you do, go to this link Potential Engine Speed (RPM) Calculator and punch in the numbers to calculate the engine rpm for 30" tires and 3.55 gears(stock combo) in OD(0.76 ratio) at the highway speed you like to run. Then change the tire size to 33" and start selecting gear ratios until you find one that produces about the same engine rpm as the stock combination. Then you will want to select the next available gear ratio up from whatever you calculate to add additional TQ to turn the larger tires. So say you calculate you need 3.95 gears to match exactly, that ratio may not be available for your axle so select the closest ratio available above the ideal ratio or 4.10's.

May 20, 2010 | 08:03 AM

#12

TexasGuy001

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I recommend 4.10 gears as well. Yes 32 11.50s will work fine on the stock wheels. The stock wheels your referring to are actually aluminum with clear coat on them.