T56 Transmission Fluid

[rleng1]

What are y’all using for transmission fluid. Yes, I’m changing the transmission fluid for nationals.

[Fbody383]

Probably wrong guy to ask but I use Royal Purple.

[Al Fernandez]

I’ve been using synthetic power steering fluid since 2001
Well, not the same fluid but you know what I mean.

[Pranav]

I've been running plain non synthetic pennzoil synchromesh. It's a touch notchy when cold but shifts like butter after the first warmup lap.

The tremec guy here in TX said for what we do the shear resistance and protection of synchromesh is better than just running dexron iii, and to run the pennzoil (also valvoline, which is just pennzoil in their bottle) synchromesh.

For a street t56 I would run regular dex III to avoid the notchines/wear from cold shifting.

Then again I also ran synthetic redline D4 for four seasons and when we took it apart to do the LS conversion everything still looked great, so I have no idea lol.

[drecords]

I've been running plain non synthetic pennzoil synchromesh. It's a touch notchy when cold but shifts like butter after the first warmup lap.

The tremec guy here in TX said for what we do the shear resistance and protection of synchromesh is better than just running dexron iii, and to run the pennzoil (also valvoline, which is just pennzoil in their bottle) synchromesh.

For a street t56 I would run regular dex III to avoid the notchines/wear from cold shifting.

Then again I also ran synthetic redline D4 for four seasons and when we took it apart to do the LS conversion everything still looked great, so I have no idea lol.
Pennzoil...eww

[centerville]

My track car has had redline d4 in it almost since new, 15 years. Fluid changed every year.

[Sook]

I thought synchromesh fluids would be bad for transmissions that don't have brass synchronizers?

[Pranav]

Pennzoil...eww

C'mon mister oil expert. Pennzoil is the label they stick on Shell lubricants (same guys that make the rotella) sold in the US these days. The exact same stuff gets a shell sticker overseas.

Pennzoil is nothing but a label brand these days.

[ShadowBolt]

I was told the Pennzoil was the same as GM synchromesh. Joe Dietrich told me to run this in my 600RR.

JJ

[drecords]

C'mon mister oil expert. Pennzoil is the label they stick on Shell lubricants (same guys that make the rotella) sold in the US these days. The exact same stuff gets a shell sticker overseas.

Pennzoil is nothing but a label brand these days.

I highly recommend Mobil products. Could be biased...

[Sook]

I highly recommend Mobil products. Could be biased...

Got a recommendation for a Mobil synchromesh?

[drecords]

Got a recommendation for a Mobil synchromesh?

I was actually just gigging Pranav. I did look it up and on the surface M1 doesn't make a Synchromesh equivalent. In the Astro I'm running a brew of Redline D4 ATF and the Syngear Synerlube II that they recommend.

[marshall_mosty]

I was actually just gigging Pranav. I did look it up and on the surface M1 doesn't make a Synchromesh equivalent. In the Astro I'm running a brew of Redline D4 ATF and the Syngear Synerlube II that they recommend.
In the Astro, I ran Amsoil ATF and Syngear Synerlube II and it worked flawlessly.

[ShadowBolt]

In the Astro, I ran Amsoil ATF and Syngear Synerlube II and it worked flawlessly.

The Syngear Synerlube II is as high as Giraffe pussy but it must work.

JJ

[BryanL]

Ran Redline D4 ATF for years following the recommendation of LAW Motorsports and never had any issue. I have switched to Motul Gear 300 75/90- D4 ATF along with Patterson I believe and also haven't had any issue that I'm aware of.
My thought is the T56 is overkill for our power levels and I don't think heat is an issue either so run a good fluid that can handle the heat. That's where I'm led to believe Motul does a good job of handling heat-I run Motul in engine, trans, and rear end.

[marshall_mosty]

Ran Redline D4 ATF for years following the recommendation of LAW Motorsports and never had any issue...

I'm not one to talk, but that's only like four weekends on the fluid, right??

[Pranav]

Yeah but he uses reverse way more than anyone else. Much harder on the fluid...

[marshall_mosty]

yeah but he uses reverse way more than anyone else. Much harder on the fluid...

lol

[rleng1]

Just changed trans fluid using Redline D4, and it looked perfect after 7 seasons. Put Redline back in.
Ready for COTA.
Will have a new look.

[Supercharged111]

I use Walmart Valvoline fluid. Replace it once a year as needed. Seems to do the trick.