I'm wondering what most of you guys on here are running in your T-5 trannies. If you have any suggestions as to what i should run in mine. just let me know. I've heard that you can run oil in them?? is it bad or better for tranny life?? any help and insight would be appreciated.

 

dextron mercon for GM's

 

Any opinions on using gear oil or oil in the tranny?? i knew about the dextron mercon... i forgot the names... i've been runnin that for a while... a buddy of mine that drag races said that most guys put oil in thier T-5's. i was just asking if anyone here has any positive comments about it.

 

on a world class unit I've heard gear oil is hard on the dog ears or something like that and can cause premature wear on the nylon synchros ... On the non world class I can't remember what gear oil hurts but I remember something about it.

 

stick to the dex.. i run valvoline full synthetic ATF dex IV or something like that.. not sure on the exact name..

 

On the '88 and newer world class T5's, use ATF or synthetic ATF only. For the older non world class T5's, you can use 90 weight gear oil, or ATF.