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Old 04-09-2006, 05:05 PM   #7
ed455
Captain Ed
 
Join Date: Jul 2003
Location: Port Charlotte, FL
Posts: 1,241
Re: transmission fluid... what type?

Quote:
Originally Posted by Green Machine
I will say DO NOT run type F in a GM transmission. Yes the type F is a higher friction fluid and it will make the clutches hold better. BUT - the bushings and thrust washers are not designed for a more aggresive fluild. You will have more wear and a shorter trans life on the internals. I would rather have a little softer shift and have the trans live longer, but it is your call.
I have 138,000 miles on a 4L60 since it's rebuild and have run type F in it since then and it still shifts well and seems as good as the day it was rebuilt. Only got 68,000 miles out of it from the time it was new before rebuild. We used Detron when it was new. EVERY, and I mean EVERY tranny rebuilder I have ever dealt with spec type F in the trannies they build. Most give 50,000+ mile warrantees so it's to their benefit to get you to run what will give the best longevity.

I'm not trying to get into a pissing match but your statement disputes everything I have evr heard from tranny guys.
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