8.8 LS clutch pack
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Laughing Gas
Joined: Oct 2003
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From: DC
8.8 LS clutch pack
My '97 F150 seems to have a humming noise coming from the rearend when turning right. I changed the fluid about 2 months ago and it didn't seem to help. I'm going to try an add another 4 oz of friction modifier and see if that helps. I'm tinking that the LS clutches are worn out. Am I barking up the wrong tree? Can a driveway mech change out the clutches or do you need a differential expert (i.e dial indicator, preloads etc...)
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From: Calhoun GA
If you have the correct ratio in there now (friction modifier vs gear oil) then adding more friction modifier will make it slip more.
Rebuilding a stock locker can be done. The backlash shouldn't change since all you're doing is rebuilding it. However, it doesn't hurt to check it anyway if you have access to a dial indicator. One thing I would recommend is to slide both axles out, completely, and punch a rag though each side with a broom stick. This would also be a good time to check the bearings as well.
Rebuilding a stock locker can be done. The backlash shouldn't change since all you're doing is rebuilding it. However, it doesn't hurt to check it anyway if you have access to a dial indicator. One thing I would recommend is to slide both axles out, completely, and punch a rag though each side with a broom stick. This would also be a good time to check the bearings as well.
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Laughing Gas
Joined: Oct 2003
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From: DC
Thanks for the reply Blurry. I changed the axles bearings at the same time I did the fluid. I thought that the bearings were the problem, obviously I was wrong about that. Is the noise I'm hearing a symptom that you would expect to have from a LS going bad, or is there some other place I should be looking.
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From: Calhoun GA
I personally haven't experienced that problem with worn LSD, but that's not to say it doesn't happen. Do a good visual of the rear suspension components before tearing into the rear end.
My stock traction lock had broken/worn friction plates at the bottom of the housing when I pulled the cover, but it never made a peep. The Auburn I had after that just blew to pieces and it never made any noise either.
My stock traction lock had broken/worn friction plates at the bottom of the housing when I pulled the cover, but it never made a peep. The Auburn I had after that just blew to pieces and it never made any noise either.
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Clutch, Transmission, Differential, Axle & Transfer Case
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Nov 5, 2013 05:57 PM
