what fluid to use in a t-5

  • Sponsors (?)


ZephyrMotorspor said:
Some guys buy'm brand new (Tremec) but some still have the stock T-5 in their stangs, which would be Borg Warner. I just use GM Synchromesh cuz thats what Tremec reccomends you ONLY use.


Tremec only recommends GM synchromesh for the 3550/TKO series of transmission....and even the later ones can take both synchromesh and ATF.

As for the t-5, t-45 and t-3650, Tremec recommends only ATF.

The reason being additives in the synchromesh can eat away at the linings on the synchro blocker rings

Straight off tremec's website

Technical Questions
What type of lube is recommended for my TREMEC transmission?


The following types of lube are recommended:
TR-3550/TKO - GM Synchromesh or Dexron III
TR-3650/T-45/T-5 - Dexron III
T-56 (Ford and GM) - Dexron III
T-56 (Viper only) - Castrol Syntorque