Grinding from rear wheels while turning
#1
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Recently my 05 V started making a grinding noise that sounds as if it's coming from the rear wheels. It only happens while turning fairly tightly, and it only happens while going forward, not reverse. There's nothing obviously loose or rubbing that I could see.
The car has 65,000 miles on it. I really hope it's not the diff, but it seems like a possibility. Any other ideas? Wheel bearings?
The car has 65,000 miles on it. I really hope it's not the diff, but it seems like a possibility. Any other ideas? Wheel bearings?
#4
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Did you put any limited slip additive with the new fluid? That is most likely the cause. Even if you put some in that already had it, you should add another 8 oz of gm additive or similar. For some reason the V diff doesn't really like the additive that comes in most HD gear oils for LSD's.
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Most CTS's don't have LSD's in them and the service manual fails to mention the addition of limited slip additive for the V so most likely, they left it out. Especially since this just started after a fluid change of the rear end.
#18
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Those who suggested friction modifier were right. I replaced the fluid and added the LSD additive and the grinding is gone. Thank you for your help.
Score: LS1tech 1; Caddy dealer, 0.
Score: LS1tech 1; Caddy dealer, 0.
#20
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Did you put any limited slip additive with the new fluid? That is most likely the cause. Even if you put some in that already had it, you should add another 8 oz of gm additive or similar. For some reason the V diff doesn't really like the additive that comes in most HD gear oils for LSD's.
Last edited by Dakota Kemp; 11-24-2020 at 06:42 PM. Reason: More info