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Discussion Starter · #1 ·
Good morning guys

just replaced mine with a clean used diff still the same sound and replace one side wheel bearing alsono change

my plan is to order new clutches and bearing because the old one have some problem

any suggestions guys help me out for any details
 

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What is the "same sound" that you are combating?
1.) A 'whine' at highway speeds that changes with throttle application?
2.)A clunk or groan that occurs at low speed in tight turns?

#1 is not affected by clutches. It could be somewhat affected by new bearings, but not likely. These diffs ruin hot;eventually the fluid gets cooked, the bearings then wear, misalignment occurs; gear tooth damage results; noise is created. Hence the "whine". New bearings might change the whine somewhat but won't eliminate it. The whine is created by the gear face damage which is permanent and no one MAKES any replacement gear sets for these. There is no actual fix other than to purchase a new differential carrier unit from GM (Rock Auto usually has a good price) for around $2K. Used diffs (as you've discovered) usually already have the damage and the whine. Now, if you could fund a 10K mile pull-out...


#2. is a noise caused by the limited slip clutches 'sticking' and it is usually caused by the lube NOT containing the required friction modifier additive. (This happens often after a Cadillac DEALER replaces the lube with the wrong fluid). The fix is to replace the lube with lube which contains the magic additive OR buy the additive and ADD it to the existing lube. Again, as above, these diffs run hot, the fluid does NOT last a long time like it does in old live axles. It is VERY unlikely that the clutches need replacing. This noise (#2) isn't fixed with bearings, but simply by clean, proper fluid.
 

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Discussion Starter · #3 ·
Yes whine at high speed and with throttle

regarding clunk in turns only one side and it not noticeable

the clucthes regarding your feedback is the onlypart that I could supply from GM
And mine has some damages

might important to mention the noisecame when I repalce full creative steel red bushings all their kit

even though thats not the reason I had a noise before and I change 1 liter only back in 18000km

this time 48000km, however the noise only come after the full maintenance bushings and angine rebuild lucky me

In my city the dealer sells it around 6000$

in ahrain and Dubai around 4800$

this is why after hard research found a used one in Kuwait

I will post update

thanks buddy
 

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Check the axles and the center bearing of the driveshaft.

Sent from my SM-G991U1 using Tapatalk
 
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