| Re: 6 Speed manual Trans S-640 Replacing a 4+3 |
Subject: Re: 6 Speed manual Trans S-640 Replacing a 4+3 by CentralCoaster on 2008/6/29 1:11:12 I don't think you'll find anyone that would recommend that. Even the rear end just uses 75w90 gear oil (which is about as thick as 5w30 motor oil, which is the weight GM used originally) The thicker 10w60 Castrol some use will be quieter. |
