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GM Synchromesh and warranty

916 Views 13 Replies 9 Participants Last post by  Walkman003309
I was about to swap to the Synchromesh in my transmission and discussed it with my brother who used to be a Ford mechanic. He brought up the issue of whether it would void the transmission warranty should Ford release a TSB. What do you guys think? What about the ones that have already done this. I have the Tri-Ax installed after this past weekend and the Synchromesh was my next step. I asked him how would Ford know? Neither of us have ever seen the stuff, so I don't know if there's a noticeable difference or not.
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I emailed Tremec directly and they stated that each automaker has a "favorite" fluid. They stated that they tested Synchromesh and Texaco Dexron ATF (non-synthetic) and both worked well. They had no comment on any other fluids (I'm using Redline D4 ATF).

From a warranty standpoint, I believe it boils down to what is written in the manual: Mercon spec'd ATF is required (lots of choices available) [Update: checked the manual, it states Mobil 1 Synthetic. I'm checking with the dealer regarding approved oils]. Redline D4 ATF meets Mercon V specs. Some people have reported better results with Synchromesh and Valvoline synthetic (most likely Mercon spec'd as well). If the dealer states a new TSB requires a different Mercon V spec'd oil, I'll let them install it.

<font size=-1>[ This Message was edited by: DrivingSimulators on 2002-03-13 01:17 ]</font>
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