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pulling a LSDiff
Posted 08 April 2005 - 12:28 PM
Having read that swapping diffs is a quick job, I still am not quite sure where to pull what loose. How and where do I get the driveshaft off, how and where do I get the axle shafts off; is it like the front CVs where I knock out a pin and yank it loose, or does something else have to happen?
I am also a pretty clean sort of fella. Is 20 year old (hopefully more well maintained than that) gear oil going to come gushing out somewhere when I take something other than the drain plugs off?
The plan is to use the fine USMB write-up on doing the gear swap to get this to 3.9:1 after I get it home. I may try to take pictures to go with the write-up when I do this. Also got my high dollar stainless brake hoses all ready for the disk brake retrofit on the back, so I might snap a few of that process as well. Need to get the pictures of my home fabricated lift posted before I do any of that though.
Wish me luck. Any advice on the whole u-pull thing would be helpful.
- James B
Posted 08 April 2005 - 12:43 PM
Posted 08 April 2005 - 12:49 PM
No oil should come out unless you turn it upside down and then the vent will leak some.
Driveshaft has a bolted flange at the diff end. Bring a PAIR of wrenches (12mm IIRC), preferably combos as the nut will prob require a boxend (6-point box best).
Unbolting the diff should be pretty straightforward, except that it is probably easier to remove the 2 large nuts on the ends of the moustache bar and taking the bar out with the diff.
Once removed and cleaned up, carefully box it up and ship it to zip 98312 LOL!
Posted 08 April 2005 - 01:30 PM
Posted 08 April 2005 - 02:01 PM
12mm wrench(driveline bolts)
17mm socket-1/2 drive
1/2 drive rachet
3/16 or equivalent punch
Large flat screw driver or small heel bar(to assist with holding the driveline still)
19mm or 21mm wrench(bring both, can't remember which for the upper bolt)
17mm wrench(upper nut)
If all else fails on the rear axles and they do not come off. You can remove the boot clamp and pull back the boot. With a small flat tip screw driver you can remove the circlip the keeps the joint together and leave the cup on the diff. It is sometimes easier to deal with these at home.
Posted 08 April 2005 - 03:52 PM
So when you say don't remove the 4 bolts, I should be taking off the bolt thru the bushing in callout number 13 below?
And thanks for the tips on the axle cups getting stuck. If it is hard to break those cups loose I have a new (to me) Victor OA welding setup in the garage at home. Making the whole thing glow a pretty red would be fun.
Appreciate the tip about bringing something to stake the driveline as well, I would have forgot about that.
- James B
(picture from the AutoZone free repair info website)
Posted 08 April 2005 - 08:57 PM
Posted 09 April 2005 - 06:05 PM
Posted 09 April 2005 - 10:36 PM
Anyway, thanks for all the advice. It made this go pretty well.
- James B
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