My 92's Power Loc rebuild
I did mine this past year, but the side gears were damaged where the spiders rolled if that makes sense.
FYI it is always good to take a Backlash measurement to see where things sit- even if you didn't change any shims. Pattern if it's quite on coast and drive 35-55 mph- you have a good pattern.
I noticed quite a few of the axle rebuilder suggest bearing life on the dana 60/70's to be 125-150,000 miles. I re-bearinged my diff. The Timken set was from autozone online($150 + 15 gift card). I highly suggest bearing replacement before failure or spinning out shims.
That's strange on the clutch material failure. On a good note, traclok is the best of the dana LSD designs. Heavy beast ~60 lbs lifting it in and out.
Michael
FYI it is always good to take a Backlash measurement to see where things sit- even if you didn't change any shims. Pattern if it's quite on coast and drive 35-55 mph- you have a good pattern.
I noticed quite a few of the axle rebuilder suggest bearing life on the dana 60/70's to be 125-150,000 miles. I re-bearinged my diff. The Timken set was from autozone online($150 + 15 gift card). I highly suggest bearing replacement before failure or spinning out shims.
That's strange on the clutch material failure. On a good note, traclok is the best of the dana LSD designs. Heavy beast ~60 lbs lifting it in and out.
Michael
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From: Land of the Toxic Avenger
....
Now to business. I have a '92 W250 4X4 with 3.54 LS gears. The spider gears are shot. I also found the shim pack on the left side to be pretty much destroyed. The shims were smashed.
I have found the complete 3rd member assembly minus carrier bearings (which I plan on replacing) for around $550.
I did not need to use a spreader to remove the assembly. That fact and the damaged shims makes me wonder if I have other problems. Any comments or ideas?
My plan is to change out the 3rd member assy, carrier bearings and replace the shims. The ring and pinion are not damaged at all. Then check the backlash and adjust as necessary.
Any info will be very much appreciated! I am sure I will have plenty more questions before I finish this project.
Now to business. I have a '92 W250 4X4 with 3.54 LS gears. The spider gears are shot. I also found the shim pack on the left side to be pretty much destroyed. The shims were smashed.
I have found the complete 3rd member assembly minus carrier bearings (which I plan on replacing) for around $550.
I did not need to use a spreader to remove the assembly. That fact and the damaged shims makes me wonder if I have other problems. Any comments or ideas?
My plan is to change out the 3rd member assy, carrier bearings and replace the shims. The ring and pinion are not damaged at all. Then check the backlash and adjust as necessary.
Any info will be very much appreciated! I am sure I will have plenty more questions before I finish this project.
Reality is, it would be a lot easier, and less expensive, to purchase a boneyard diff, replace the spiders on a bench if required, and install the used differential in the truck, tossing out the original one. If it was my truck, that's probably the way I would go, as it would be so much easier, and the thought of dumping all that money into a diff that could cause the same problem all over again just isn't worth it to me.
Ps: Replace the Ubolts with new when you do this. THey're really not designed to be reused, and at about $9 each well worth the investment.
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Joined: Dec 2010
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From: Land of the Toxic Avenger
I've been told by a local mechanic that the Trac Loc will outlast an aftermarket LSD, as it's designed for the long haul. Supposedly, other than the detroit locker, the aftermarket units supposedly have a limited lifespan.
Peronsally,
I'd rather build one than gamble with a used junkyard diff. If your diff has damaged shims, it's ussually on the thrust side. It depends solely on the condition of the bearings on if you'll need a new gear. You would need to check and see if the bearing race spun in the case which is the killer failure mode for the case. Then you would consider junkyard. But any diff with over 150k should be probably get new bearings and seals.
The original shims were soft- FYI the dana replacement shims are suppose to be a stronger steel. While a new gear is easier to pattern(Yukon or dana) an old one can be done with close look at the coast side.
Michael
I'd rather build one than gamble with a used junkyard diff. If your diff has damaged shims, it's ussually on the thrust side. It depends solely on the condition of the bearings on if you'll need a new gear. You would need to check and see if the bearing race spun in the case which is the killer failure mode for the case. Then you would consider junkyard. But any diff with over 150k should be probably get new bearings and seals.
The original shims were soft- FYI the dana replacement shims are suppose to be a stronger steel. While a new gear is easier to pattern(Yukon or dana) an old one can be done with close look at the coast side.
Michael
The simple fact that your shims were damaged tells me that you need to completely re-set your diff, meaning that you need to start as if you were putting together a new assembly. Personally, I've never done it from scratch, but if I had to, the unit would get completely disassembled and every internal part would be replaced that was a wear item. I would only do this AFTER I determined if the housing itself had been damaged, as it is possible that the housing can warp or be bent due to previous use by a former owner.
Reality is, it would be a lot easier, and less expensive, to purchase a boneyard diff, replace the spiders on a bench if required, and install the used differential in the truck, tossing out the original one. If it was my truck, that's probably the way I would go, as it would be so much easier, and the thought of dumping all that money into a diff that could cause the same problem all over again just isn't worth it to me.
Ps: Replace the Ubolts with new when you do this. THey're really not designed to be reused, and at about $9 each well worth the investment.
Reality is, it would be a lot easier, and less expensive, to purchase a boneyard diff, replace the spiders on a bench if required, and install the used differential in the truck, tossing out the original one. If it was my truck, that's probably the way I would go, as it would be so much easier, and the thought of dumping all that money into a diff that could cause the same problem all over again just isn't worth it to me.
Ps: Replace the Ubolts with new when you do this. THey're really not designed to be reused, and at about $9 each well worth the investment.
I plan on using the truck only locally, not any long hauls or pulling. I live on the Texas coast and rust has not been nice to my truck. The motor,front drive train and tranny or still fine. Just hard to put her out to pasture!
Peronsally,
If your diff has damaged shims, it's ussually on the thrust side.
Which side is the thrust side?
It depends solely on the condition of the bearings on if you'll need a new gear.
Are you talking about the ring gear here?
You would need to check and see if the bearing race spun in the case which is the killer failure mode for the case. Then you would consider junkyard. But any diff with over 150k should be probably get new bearings and seals.
The original shims were soft- FYI the dana replacement shims are suppose to be a stronger steel. While a new gear is easier to pattern(Yukon or dana) an old one can be done with close look at the coast side.
Can you explain what you mean by a "close look at the coast side"?
Michael
If your diff has damaged shims, it's ussually on the thrust side.
Which side is the thrust side?
It depends solely on the condition of the bearings on if you'll need a new gear.
Are you talking about the ring gear here?
You would need to check and see if the bearing race spun in the case which is the killer failure mode for the case. Then you would consider junkyard. But any diff with over 150k should be probably get new bearings and seals.
The original shims were soft- FYI the dana replacement shims are suppose to be a stronger steel. While a new gear is easier to pattern(Yukon or dana) an old one can be done with close look at the coast side.
Can you explain what you mean by a "close look at the coast side"?
Michael


