What is the recommended gear lube for the '06? I had the lube changed to synthetic (not knowing it already had it in it shame on me) and it hates life with a passion. The fluid that was put in was Red Line Lightweight Shockproof 75W140. The service manual says the rear end should have 75W140 and gives a part number of 89021809. Went to the dealer and they said the number was valid, but not available in the US. They said they had never had to service the rear end of a GTO so they didn't have a clue. The only synthetic they had was 75W90 (corvettes and CTS-V's use that).
Help!! It has gotten bad enough that I have parked the car in fear of damaging the rear end. It binds up real bad when backing up and in turns. We added more additive and it helped for a little while and then started acting up again.
Recommendations please...:confused
Help!! It has gotten bad enough that I have parked the car in fear of damaging the rear end. It binds up real bad when backing up and in turns. We added more additive and it helped for a little while and then started acting up again.
Recommendations please...:confused