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Old 02-13-2009, 10:33 AM
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Default 69 FJ55 fun

So you may have read that I bought Frontrange4x4's 1969/77 FJ55, and he had sold the 4.88 gears and ARB locker to Mtntrucker. So we had a gear swapping party where somehow I had to do all the work! Had 2 issues with the swap:

1. Rear diff somehow ended up with a bunged up stud...and of course it was the lowest stud possible, so it leaked like crazy. Pretty much drained the diff overnight. Thought I would just pull the stud, but of course there is no room between the stud and the diff housing for a stud puller. So.....guess that means I have to pull the cover, take out the locker (NOT looking forward to that), unbolt driveshaft, take off diff, pull stud, replaces stud, replace gaskets, install locker, and reinstall everything else.

2. When Ige went to hook up the front driveshaft she could not pull it out the couple of inches it needed, so she asked "strongman Timm" to do it and I could not budge it. Then we even hooked up a chain to it and my considerable weight pulling on it would not budge it. We ended up tying it to the frame with some wire we had lying around. Any ide why or how that could happen? I will be taking it off and see what I can do...I also have as extra driveshaft if needed.


T
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Old 02-13-2009, 11:35 AM
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2. Is there some crazy vacuum action in the splines? did you try removing the zirc fitting?
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Old 02-13-2009, 11:36 AM
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Quote:
Originally Posted by timmbuck2 View Post
2. When Ige went to hook up the front driveshaft she could not pull it out the couple of inches it needed, so she asked "strongman Timm" to do it and I could not budge it. Then we even hooked up a chain to it and my considerable weight pulling on it would not budge it. We ended up tying it to the frame with some wire we had lying around. Any ide why or how that could happen? I will be taking it off and see what I can do...I also have as extra driveshaft if needed.
If I understand you right you cannot extend the front driveshaft so that it can be bolted up at both ends correct?

My first thought is if there is a zerk on the shaft and if so did you remove that? That might release the pressure/suction and allow the two pieces to pull apart. Not much advise but hey, it's free

Edit: Nakman beat me to it - I feel better now that my suggestion matches his
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Old 02-13-2009, 01:04 PM
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I thought the diff studs screwed in and out? Some PB Blaster and a vise grips should do it. I'd probably snap the stud off trying.

If you get the zirc fitting off, try some PB both inside and out. If it's frozen you might as well get a new drive shaft. It needs to be able to slide in and out.

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Old 02-13-2009, 01:54 PM
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I might have a front driveshaft for a pig. Lemme check my stash at home. If so you are welcome to have it.
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Old 02-13-2009, 02:13 PM
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What struck me odd about the DS is that after unbolting the front it sucked in and wouldn't budge. Crazy vacuum action seems the only answer.

Timm, the good news is that it's the rear diff bunged bolt, not the front.
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Old 02-13-2009, 04:04 PM
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Quote:
Originally Posted by Front Range 4x4 View Post
What struck me odd about the DS is that after unbolting the front it sucked in and wouldn't budge. Crazy vacuum action seems the only answer...
Cold temps = vacuum on a sealed system.

Did you try hitting it with a torch?
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Old 02-13-2009, 04:19 PM
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Quote:
Originally Posted by PabloCruise View Post
Cold temps = vacuum on a sealed system.

Did you try hitting it with a torch?

you beat me to it. sizzle sizzle, drip drip!
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Old 02-13-2009, 04:21 PM
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I don't hit anyone else's truck with a torch.

We were inside for 11 hours so I don't think cold was a factor.
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Old 02-13-2009, 05:19 PM
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Double nut the stud and take it out with a wrench.
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