Borg Warner t4 fluid

[Anderscj8]

I have a scrambler with a AMC 304 and a 4 speed. I discovered the Transmission is a Borg Warner T-4 . Lately I’ve been having problems getting the car in all 4 gears. This typically happens when the car has been driven for a while or when it has just started and is cold. My mechanic told me to change the Transmission fluid but I don’t have the slightest clue of what kind of fluid to put in it. Does anyone have any suggestions to put in it?

 

[hole]

You will likely get a handful of different answers for the T-4 /5's, but Synchromesh was the one that cleared up hard shifting and mild grinding issues for me when I ran a T-5 .

 

[hole]

Another thing you will likely hear is the the V8 is too much for the T-4 to handle since it is a light duty Transmission ,which may well be true, but it's ultimate life span depends greatly on how you drive and use yours.

 

[RiverandSand]

There was discussion about this awhile back. TSM called for ATF Dextron but was changed to a MT grade 75-90 gear oil. Search borg warner T-4 fluid or oil for that thread.