Rear differential problems

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My sons 92, W250, 5 spd. with LSD/antilock and 130k miles has a problem.
I trashed the diff. (it was my truck originally) pulling a 14k lb. 5th ehl. 70,00 miles. I had it replaced ($1700) before he got it. Lasted a month and started making loud noises. Took it back, they replaced it again. Said it was their fault. Now after 20k miles it is making noises when turning in either direction. Had fluid replaced and added 3 tubes of LSD fluid. Helped for awhile but noise is back again. It works fine, justs makes those strange, unnerving sounds.
Any ideas would be appreciated.

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98 24v,3500,4x4,quadcab,5 spd,3. 54,all options available when ordered,oem full length diamond plate running boards, eyebrows & hood dam, bed edges,bedhooks plus Rhinohide liner, Pacbrake, britebox,"deepdish"mats, topper shell, Sandstone & camel leather. Lowered rear end 4" to set truck level. brush guard.
Digital boost/egt gauges coming for fathers day present from two sons, both with Dodge/Cummins. fender chrome "eyebrows" coming.

 

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Jack,
If it makes you feel any better, my 93 does the same thing and has for the past year or two. Really can feel the thing "ratchet" when going slow and making a turn such as in a parking lot. Am thinking of having the rear end rebuilt but will wait a while longer to see what happens.

Do you know if they replaced the limited slip setup when the thing was rebuilt? If so, what kind did they reinstall?

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Stan
93 2WD extended cab, Banks Power Pack, K&N Air Filter, Auto w/4. 10 rear with gear locker, US Gear Exhaust Brake, 3. 5" Exhaust, 5K air bags, Boost/Pyro/Tach Gauges, Green/Silver, 137K

 

[Archive]

Paccool,
Thanks for the comeback. I do not know the brand but it was replaced with another limited slip "pumpkin" by a local reputable shop.
As I said before, it works just fine and has for 15k miles. Just a real pain in the a-- to listen to all the time.
I should have listened to the old man in the repair shop when he said, "don't sell your old truck to your son, it will come back to haunt you". He was right. Unfortunately he has since died and will never know he was right.



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98 24v,3500,4x4,quadcab,5 spd,3. 54,all options available when ordered,oem full length diamond plate running boards, eyebrows & hood dam, bed edges,bedhooks plus Rhinohide liner, Pacbrake, britebox,"deepdish"mats, matching topper shell, Sandstone & camel leather, stainless fender eyebrows, chrome exhaust turndown pipe.
Lowered rear end 4" to set truck level. brush guard.
SPA digital boost/egt gauge and pillar mount coming for fathers day present from two sons, both with Dodge/Cummins, a 92 & 01.