[Redlinez]

Thanks for that input! I'll look into the Amsoil as well.

[MatthewAMEL]

Originally Posted by N Camarolina

I seem to recall that you purchased Tremec's fluid at least once before, but I can't remember what your feedback was on it's performance. Perhaps you can share now?

I ask because Tremec's fluid is considerably higher viscosity than the OEM, isn't it? Which would potentially provide higher protection on the track, but also more clunkiness on daily drives upon start up and 1st mile or so of driving (especially in cold weather)?

Please forgive me if you've shared this previously.

I have been running it for nearly 3 years now. DD (low miles) in Florida and LOTS of AutoX and Track time.


Rarely gets below 40F here, so I can't really comment on how it behaves in low temp environments. The fluid gets changed twice a year and shifts well and makes no abnormal noises.


I can tell you that I believe in it and TREMEC enough that I am switching the fluid in the Blackwing to the HP-MTF when I hit 1,500 miles.

[mano_camaro]

Originally Posted by N Camarolina

I ask because Tremec's fluid is considerably higher viscosity than the OEM, isn't it? Which would potentially provide higher protection on the track, but also more clunkiness on daily drives upon start up and 1st mile or so of driving (especially in cold weather)?

during winter i experience temps around 20's & 30's and your assessment is correct. when is cold, the Tremec fluid makes it clunky, however on warm days 60 deg + it is very smooth.

I mostly have to start from 1st and go straight to third gear skipping the 2nd gear on the first few minutes of driving, even third gets clunky a lot of times.

[N Camarolina]

Originally Posted by mano_camaro

during winter i experience temps around 20's & 30's and your assessment is correct. when is cold, the Tremec fluid makes it clunky, however on warm days 60 deg + it is very smooth.

I mostly have to start from 1st and go straight to third gear skipping the 2nd gear on the first few minutes of driving, even third gets clunky a lot of times.

Thanks for the useful info about the Tremec fluid. Not living in a "warm all the time" climate, I think I'd be frustrated with the clunky shifting when the fluid's cold. Thus, will plan to stick to the OEM.

[havelegs]

Soooo, is 88861800 correct for the m6?

[haggler]

I wanted to share this article I found:
https://txdrivetrain.com/fluid-type-...56-tr6060-faq/
I have no experience with them but it seems like they rebuild these transmissions. Basically they state to use non-synthetic fluid in these, which the OEM part is (dexIII) and products like Valvoline Dex/Merc which is DexIII equivalent.

[N Camarolina]

Originally Posted by haggler

I wanted to share this article I found:
https://txdrivetrain.com/fluid-type-...56-tr6060-faq/
I have no experience with them but it seems like they rebuild these transmissions. Basically they state to use non-synthetic fluid in these, which the OEM part is (dexIII) and products like Valvoline Dex/Merc which is DexIII equivalent.

Thanks for providing this. They don't provide any data to back up their position, but they at least have a theory and presumably some experience over the years that might support the theory.

Since both their theory and GM call for using OEM or non-synthetic ATF, that's what I'll do. Not sure if the syncros will indeed be more short lived with synthetic ATF, but why take the chance if you intend to own your SS for several years.

[lucabelga]

Originally Posted by MatthewAMEL

This is what you want for the M6.


https://www.tremec-store.com/collect...smission-fluid

Based on the Data Sheet provided by Tremec:

Applications:

Recommended for motor vehicles with manual gearboxes that require GL4 75W85 MTF, synchromesh, or DEXRON®-III/MERCON® fluids.

Not recommended for automatic transmissions or hypoid gear differentials.

In this way, it is natural to GM to apply Dex III ATF fluid from the factory, but can't see no harm in using, for example, Amsoil fluid as it complies with the Viscosity and API Specs