C10-C90 Bill-
Nope the OD didn't make it worse, it's been like that since I bought it I'm afraid and been doing it for years before I bot it. About 1/4 of the teeth are ground down where it's been forced in gear. (another reason why I kinda want to change it.)
squeeze-
I kinda figured anyway you look at it the 80's unit would work better than the 54', less age, less abuse, better tolerances etc. But I'm not sure if the SM465 will take the hand brake system, and I like the drive shaft parking break the 1954 has hince why I'm considering the 1954.
I've drove several trucks with SM 465's very good trannies. Even with wear they still shift easy and noise is minimal compared to my 47's tranny.
I haven't had the pleasure of driving a truck with a SM420 (other than the sliding gear job) before so I don't know how they are.
So my question though not phrased properly before is: How much better will the constant mesh 1954 SM420 be to shift and how much less noise will it make than the 1947 tranny with sliding gears? And how much worse is it than the SM465 assuming all three are actually in relatively the same shape?
I know having helical cuts will kill some noise but with the small angle how much is my question.
According to what I've heard and read the input shafts on both these tyrannies are exactly the same. Length spline and diameters, only output shaft changed. But I guess I'll find out. What I do know for a fact is my 1947 tranny is currently hooked to a 1959 engine. So I assume at least the 1954 will fit.
