Fastfox400
New Member
- Joined
- Aug 15, 2008
- Messages
- 41
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i've used the GM stuff before. Being aworked a large GM dealer as a mechanic. GM synchromesh is made by Pennzoil up untill lately. When i was at GM All oils were delivered by Pennziol trucks. I prefer the royal purple synchromesh. It removed more than 80% of the notchy shifts in a G-Force t5 i had. I have continued to use it in my T45 in my 96.