Mobil 1 Synthetic ATF vs Acdelco stock fill
 

What fluid gives the best shifting characteristics for TR6060 manual? Will the mobil 1 slow synchronizer performance at all?

I've seen many forums discussing aftermarket fluids some say stock fluid is better vs mobil or vise versa, would like to hear some more insight on this.

Thanx

I didnt like the Mobil 1 trans fluid. I had good improvement with royal purple synchromesh