I've been doing some research about GM syncromesh without much luck. Anyone tried this stuff for their tranny? TIA

 

There have been a few discussions/threads on this. I think a search would be very worthwhile.

The parts guy at the Chevy dealer says guys with Fords and other brands also buy the stuff because it works well for them. So far, the best stuff for my S2000 yet, it seems to me. I have used RedLine and Honda's.

 

I'll put it this way: this is the fluid that should have been in the transmission from the factory.

If you thought that your transmission shifted good before, you don't know what good is, until you put this fluid in your transmission. If I didn't know better, I'd say that the shifter was disconnected from the transmission. You can still feel the gears being shifted, but just barely. All the hesitation and notchiness is gone, from the first moment that I drove away from the garage after changing the fluid.

The part number for this fluid is #12345349 and it's available at your local Chevy dealer for $9.91/qt. It seems to be about the same viscosity as the MTF. To quote from the package "this product has excellent lubrication properties and does not break down. It withstands high temperatures and functions well in low temperatures. It is an amber colored light bodied base product that is a partially synthetic manual transmission fluid."

I'm going to look into this link : http://www.gmgoodwrench.com

Will see what they have to say about this fluid.

Bob

 

Would use of this fluid void one's warrantee?

 

My S2000 is only a couple of months old with just over 1000miles on it. Is there any reason to wait to switch to the GM Synchromesh tranny fluid (break in period?) or should I change it right away. I know with the engine to stay with conventional motor oil till at least 7000miles before going to synthetic to allow the engine to properly break in. The tranny shifts very smoothly already but I'm always open to improvements.
Thanks,
Glen

 

Put it in mine at 3000 miles. I'm very skeptical about any improvements resulting from different tranny fluids. But I'll be
damned if this stuff doesn't work........ and very well! I feel smoother shifts and less notchyness throughout the pattern.

Nothing else will go in my trans from now on.

 

My tranny is tough when it is cool and cold. Does the GM Sycromesh help in the extreme temps hot or cold?

 

Neo MTF will work better than GM for your cold application.

 

I did a search on this stuff and everyone is using it. Jeeps, Hondas, Fords, BMWs, Mitsubishis and of course GM products. It is supposed to be very good in cold temps as well as hot temps.

About the only thing that I didn't find were specs. Oh well.

 

Ford has a TSB recommending this fluid for cold shifting problems with their Mustang transmissions. At least that was what I read on one of the Mustang boards.