My 39 pickup has a 4 speed. No synchronizers. (Someone posted you can tell them apart by the lock out lever for reverse.) It was very loud when i bought it, but i drained all the fluid and rinsed it out with mineral spirits. Refilled with the best 90w i could find. it seems much quiet now. but still sings in lower gears.


"It ain't a truck if you can't hose out the cab."