T56 w/ paper blocking rings, clashes when cold, fluid?

[CJK440]

I posted before asking about best fluid for a T-56 w/ carbon fiber lined syncro blocker rings that clashes when cold and got some good responses. I ended up just putting in Dex III to at least start with known fluid and it didn't make a difference.

Well, I learned that in 2001 T-56's went to carbon but my 2000 has paper linings and supposedly they are sensitive to synthetics. I'm ready to try something new and wondered if there is a different set of suggestions for paper linings?

Some report Amsoil torque drive, despite being a synth, meets the spec and won't harm the paper. I never used any Amsoil but willing to give it a go if it can keep me from wearing the box out.

 

[Devo242]

Has TREMEC's own MTF been considered?

https://www.tremec-store.com/products/tremec-hp-mtf-transmission-fluid

 

[CJK440]

Has TREMEC's own MTF been considered?

https://www.tremec-store.com/products/tremec-hp-mtf-transmission-fluid

I did not know they offered this. However when I shared my application to confirm compatibility with them, they asked for the trans tag number which could just be standard tech support practice or lack of a resounding yes makes me think there are some T-56's that they don't recommend usage in. I will need to get under the car to get this.

 

[MolaKule]

Friction materials in MT and AT transmissions are composed of fibers, fillers, and binders.

Your Tremec fiber is cellulose with the filler being diatomaceous earth, and the binder a phenolic resin.

Base oil type rarely affects operation, but the additive package may.

 

[CJK440]

Friction materials in MT and AT transmissions are composed of fibers, fillers, and binders.

Your Tremec fiber is cellulose with the filler being diatomaceous earth, and the binder a phenolic resin.

Base oil type rarely affects operation, but the additive package may.

Any reason to think a boutique fluid could cure grinding (apparently even when hot when shifting real quick) vs fresh Walmart Dex 3? Or is this mechanic in a bottle thinking?

Some owners swear by Amsoil Torque Drive with the same paper/cellulose blocker material. I never used their stuff but if there is a chance $60 in fluid could eliminate the need for an $800 synchro kit and my labor?

 

[MolaKule]

Any reason to think a boutique fluid could cure grinding (apparently even when hot when shifting real quick) vs fresh Walmart Dex 3? Or is this mechanic in a bottle thinking?

Some owners swear by Amsoil Torque Drive with the same paper/cellulose blocker material. I never used their stuff but if there is a chance $60 in fluid could eliminate the need for an $800 synchro kit and my labor?

Dex 3 has the same viscosity as Torque Drive with essentially the same friction characteristics, but there is no guarantee of a cure for an MT with a worn synchro assembly.

 

[69GTX]

I posted before asking about best fluid for a T-56 w/ carbon fiber lined syncro blocker rings that clashes when cold and got some good responses. I ended up just putting in Dex III to at least start with known fluid and it didn't make a difference.

Well, I learned that in 2001 T-56's went to carbon but my 2000 has paper linings and supposedly they are sensitive to synthetics. I'm ready to try something new and wondered if there is a different set of suggestions for paper linings?

Some report Amsoil torque drive, despite being a synth, meets the spec and won't harm the paper. I never used any Amsoil but willing to give it a go if it can keep me from wearing the box out.

My 1999 Camaro with the original T-56 transmission with the cellulose blocking rings has done fine on the recommended GM Manual Transmission & Transfer case fluid GM #88861800......basically non-synthetic ATF Dex III with a slight improvement in the add package. I don't typically drive it below 40 deg F. ambient. Any slight sluggishness in the shifts for the first 1/2 mile or so or gone in about 5 minutes.

When I looked into possibly trying synthetics the only two I felt somewhat "comfortable" with after going through dozens of threads on the subject were Mobil 1 ATF and the Red Line D4. Those fluids experienced FAR less reported issues than many of the other MTL's or synthetic ATF's. I believe Tremec only recommends the Mobil 1 synthetic ATF. There are some well known speed/trans shops that don't recommend a synthetic fluid. I change out the GM fluid about every 5K miles as I know it shears fairly rapidly. That's 5+ years of driving for me.

https://ls1tech.com/forums/manual-transmission/1865588-transmission-fluid-use-t-56-a.html