Drivetrain T5 5th gear options

Can’t use the GM gears on a Ford t5. The mainshaft spline counts are not the same. GM is 27 spline and ford is 28.


So there are three main 5th gearsets for the T5 that I am aware of not including the aftermarket offerings.

27/59
25/51
33/53

I think there is a 31/55 but not so much info on that.

The 2.95 gearset came with the 25/51 set which gave you 0.63. With the 27/59 you got 0.59

The 3.35 gearset comes with 27/59 which gives you 0.68. Some of the 94-98 V6 cars came with the 25/51 which gives you 0.73 which is probably what you are looking for.

The 33/53 set came on a few early 2.95 trans and is hard to find. It gave you 0.80 in a 2.95 trans and 0.97ish in a 3.35 trans. Lots of aftermarket 5th gears are similar to this one and give you 0.80 only with the 2.95 box. You don’t want this for obvious reasons.


Sounds like you want to find a 25/51 gearset from a 94-98 v6 trans. I am not sure what gearset came in the 99-04 and 05-10 trans so count the teeth and compare.