T18-1b

[Kman]

I just picked up a 1975 CJ5 rolling chassis.It has a T18-1B four speed in it.This is the trans with the 4.02:1 first gear correct?It has the Spicer 20 transfercase and 3.73 gears.

[Davisrats]

Hard to say what gears, from what I found you may have to take the cover off and count the teeth on the input shaft,
23 teeth = 4-1
17 teeth = 6.32-1

Or wait till it runs or untill you pull it. It didn't come from the factory in a CJ so it is anybody's guess.