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

How does the TTB come apart?

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Old Feb 17, 2021 | 08:13 AM
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How does the TTB come apart?

Working on the differentials. I know the left beam is the actual differential cover, so how do I get the case out? Do I have to disassemble the entire front end? I just did rad/piv bushings a couple weeks ago and that's a lot of work.
 
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Old Feb 17, 2021 | 10:06 AM
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What a coincidence. I am searching on removing the TTB. I'm doing a cut and turn and lowering my 6 inch lift to a 4 inch. Here's what Dave at Threat Motorsports emailed me yesterday. A little trick for you when you go to separate the radius arms from the TTB's. In the inside of the TTB's where the bosses are that the top and bottom bolts connect to use a little heat on them. You can use something as simple as a propane torch on them. Ford used some crazy strong lock tight on them so by applying heat it makes it WAY easier to remove those bolts.
It looks to me that you jack up truck at frame in a safe spot to allow room to work on TTB. Support TTB. Compress coils and remove. Get knuckles and steering links removed. Break loose the four bolts that Dave mentions. Two on each side that you can now get to with coils and knuckles and axles out. Break loose radius arm bolts at pivot on frame. Oh yeah drain differential oil at start. Break loose bolts around differential housing.
I think then the TTB comes out. I may have missed something that some else might point out.I hope.
I've never done it before but I am doing it today.
 
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Old Feb 17, 2021 | 01:11 PM
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I think I should be able to leave the passenger side untouched, as long as there's enough room to pull the center slip yoke apart. But then I guess at least the driver side hub/rotor/caliper would have to come off at least.
 
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Old Feb 17, 2021 | 02:10 PM
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You have to pull the axle out on the driver's side. Take the front driveshaft out. Then loosen the boot on the pass side front axle slip joint. Then take all the bolts out of the pumpkin and drop it out. You will have to pull it back and work the stub axle out that is still in the pumpkin on the pass side.

Once you get it out, if you have a early frontend, there will be a 3 bolt retainer that holds the pass side stub axle in place. If you have a later axle you have to push in on the stub axle and take a c-clip out of the center of the axle to pull the stub axle.
 
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Old Feb 17, 2021 | 02:32 PM
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Well that doesn't sound too horrible.
 
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Old Feb 17, 2021 | 06:51 PM
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That pumpkin is very heavy so be careful. And getting it back in is not much fun. I had to pull the pass side axle also, I was by myself and could not lift the pumpkin in place and get the slip joint on the pass side started at the same time. So I took the pass side apart and pulled the axle out a little bit and put the pumpkin in first. Double check that slip joint in the pass side axle, make sure it's not wore out.

P.S. I can't remember if the axle splines on the pass side are keyed or not. If they are not, remember the u-joint rules and line them up before you slip it together.
 
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Old Feb 17, 2021 | 07:20 PM
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I actually have about a 5 inch piece of tubing in mine.
had it on the spout of some gear oil.
squeezed too hard I guess
 
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Old Feb 18, 2021 | 10:48 AM
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I realize now that what your doing isn't what I thought. I see your removing the whole front end. Good Luck,
 
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Old Feb 18, 2021 | 11:33 AM
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Originally Posted by jj128
I realize now that what your doing isn't what I thought. I see your removing the whole front end. Good Luck,
Just trying to get the differential case out so that I can re-gear it. Not the whole front end.
 
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Old Feb 18, 2021 | 06:50 PM
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I pulled mine a few months ago to refresh the front end.

Axleshafts out - fair amount of work there. I don’t think the passenger side slip joint is keyed, but mark for orientation.

I found it impossible to pull the passenger side stub from the case while installed (I have an 80). One bolt is slap inaccessible and I saw no real way to pull the stub without fabbing up something to secure to the yoke.

I had a transmission jack and essentially backed the pumpkin out a bit, rolled it CW so the stub clears the beam, then pulled it out. It’s difficult to tell when it clears its fit to the beam so be prepared for it to drop a bit.

Reassembly is the reverse. You will have roll the pumpkin CCW after you clear the passenger side beam. I used some allthread to help pilot the pumpkin into the housing. The real key was chocking the pumpkin flange face to make it parallel to the beam face. You’ll still have to manhandle it into the beam as I ran out of clearance to move the jack forward.

I used a Lubelocker gasket and didn’t leak a drop. Unfortunately my new pinion seal riding on a Speedi-Sleeve is leaking. Always something...
 
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Old Feb 18, 2021 | 07:00 PM
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Originally Posted by packagerjr
I pulled mine a few months ago to refresh the front end.

Axleshafts out - fair amount of work there. I don’t think the passenger side slip joint is keyed, but mark for orientation.

I found it impossible to pull the passenger side stub from the case while installed (I have an 80). One bolt is slap inaccessible and I saw no real way to pull the stub without fabbing up something to secure to the yoke.

I had a transmission jack and essentially backed the pumpkin out a bit, rolled it CW so the stub clears the beam, then pulled it out. It’s difficult to tell when it clears its fit to the beam so be prepared for it to drop a bit.

Reassembly is the reverse. You will have roll the pumpkin CCW after you clear the passenger side beam. I used some allthread to help pilot the pumpkin into the housing. The real key was chocking the pumpkin flange face to make it parallel to the beam face. You’ll still have to manhandle it into the beam as I ran out of clearance to move the jack forward.

I used a Lubelocker gasket and didn’t leak a drop. Unfortunately my new pinion seal riding on a Speedi-Sleeve is leaking. Always something...
I had an 80 also, and although I got the 3 little bolts out, I too could not get the stub axle to budge. Once I pulled the whole pumpkin and it was laying on the ground I was able to pull it right out.

It was a long time ago, I remember having to shovel the snow out on each side of the truck to work on it, we had one of those big snows back in I think 1996, and I knew the slip joint on the pass side axle had a lot of wear in it, well I got stuck and it stripped it out. I had to buy a new yoke and a new pass side axle and then tear it all out to replace it.

When I pulled the pumpkin that is when I found out it had a limited slip clutch pack in it. It was dry and a little rusted when I took it apart, I put it back together and put oil in it. But I think those clutches must have been rusted fast, because that thing would really go in the snow, but you could not turn a corner for anything.
 
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Old Feb 19, 2021 | 07:51 AM
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Originally Posted by Franklin2
I had an 80 also, and although I got the 3 little bolts out, I too could not get the stub axle to budge. Once I pulled the whole pumpkin and it was laying on the ground I was able to pull it right out.

It was a long time ago, I remember having to shovel the snow out on each side of the truck to work on it, we had one of those big snows back in I think 1996, and I knew the slip joint on the pass side axle had a lot of wear in it, well I got stuck and it stripped it out. I had to buy a new yoke and a new pass side axle and then tear it all out to replace it.

When I pulled the pumpkin that is when I found out it had a limited slip clutch pack in it. It was dry and a little rusted when I took it apart, I put it back together and put oil in it. But I think those clutches must have been rusted fast, because that thing would really go in the snow, but you could not turn a corner for anything.
Got to do mine in the garage - can't even fathom the snow!
 
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Old Jul 10, 2021 | 07:33 PM
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Haven’t done it yet, but need to get it done soon.
 
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