Please help quick question!!!!
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,694
Likes: 4
From: Franklin Square Long Island NY
Please help quick question!!!!
Im about to change my diff fluid and i read this...
"""Time to refill the axle. Read the latest GM TSB regarding rear axle chatter to determine which GM gear oil you should be using. In sum, if you are experiencing chatter and your clutch packs / plates have NOT yet been changed, use GM part # 89021669 (non-synthetic) gear oil and 4 oz of GM part # 01052358 friction modifier additive - this is different than what the shop manual calls for. If you are not experiencing chatter, or if your clutch packs have just been changed, use GM part # 12378261 synthetic gear oil and 4 oz of the same additive described above - this IS what the shop manual calls for."""
My question is can i switch to synthetic if my clutch packs have not been changed? I am experiencing chatter.
Thanks
Dan
"""Time to refill the axle. Read the latest GM TSB regarding rear axle chatter to determine which GM gear oil you should be using. In sum, if you are experiencing chatter and your clutch packs / plates have NOT yet been changed, use GM part # 89021669 (non-synthetic) gear oil and 4 oz of GM part # 01052358 friction modifier additive - this is different than what the shop manual calls for. If you are not experiencing chatter, or if your clutch packs have just been changed, use GM part # 12378261 synthetic gear oil and 4 oz of the same additive described above - this IS what the shop manual calls for."""
My question is can i switch to synthetic if my clutch packs have not been changed? I am experiencing chatter.
Thanks
Dan
Last edited by Mpwr; Aug 15, 2009 at 10:07 AM.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
Since you're experiencing chatter and your clutch packs have not been changed, wouldn't you want to follow what the latest GM TSB recommends and use the (non-synthetic) gear oil with the friction additive? If it were me I'd defer to the most current GM recommendation.
