Where to start?
I spent a few hours with my nose in the books (5-6) to find out what the differences are in the IH 5spd's,ie; the T-34,35,36,495,496,698 & 699. They all "look alike" and share a majority of internal parts. They are "constant mesh" and are synchronized in 2-3,4-5 direct in 5th transmissions (except the T-34).
The shift pattern is the same in all but the T-34...
Left up = 1st
Left down = Rev.
Center up = 2nd
Right up = 4th
Right down = 5th
1 2 4
R 3 5
With the T-34 4th & 5th is opposite the above.
Here's some ratio's,1st,2nd etc.
T34 6.21, 3.43, 1.81, 1.00, .082
T35 Direct in 5th = 7.17,3.96,2.36,1.41,1.00
T36 Direct in 5th 1.22 in 4th = 6.21,3.43,2.05,1.22,1.00
T495 Direct in 5th = Same as T-35
T496 Direct in 5th 1.22 in 4th = Same as T-36
T698 Direct in 5th = Same as T-35
T699 Direct in 5th 1.22 in 4th = Same as T-36
If there's no tag then try the case casting pn,if the 1st 3 digits are 238 it's a 34-36,if they're 440 it's a 495/496 and 497 for the 698/699.
Another thing I found is that a T-34 from a Loadstar/Cargostar will have a 1-1/2"-10 spline input shaft no matter the engine and if from a light line truck will have the more common 1-1/4"-10 spline as will a 35/36 unless it was mated to a diesel or RD engine,which are also 1-1/2-10.
That being the case,a T-34 from a Loadstar would be easy to ID.
The gearing difference between them is the main drive gear (aka. input shaft) and the gears on the countershaft,I made a list up if anyone's interested. I also have a tooth count if I deciphered the aftermarket catalog I have crappy listing correctly(?)
OK,I'm tired,did I miss anything?
12 yrs.exp. in IH dealer parts dept.
Never argue with a fool...
If you don't have anything nice to say...say nothing.
If you don't learn something new everyday...you weren't paying attention.
THINK! Be sure brain is connected before mouth is in gear.