[Bob Carriere]

... which is worth more now!!!!!

1. Typically the front axle ratio of half tracks always overdrive the rear assembly by at least a little bit..... remember the initial thread.... they are hard enough to steer without having the superior traction of the rear pushing faster than the front axle.

2. Charlie is right all other half track I have seen have the diff, mounted up front even White and Internationals..... maybe it was to give some movement to the track rather than a stiff suspension associated with a quick transplant of a UC track.

3. from my experience with the 2 speed T case I beleive that it is impossible to run the front axle at 1.87 while the rear runs at 1 to 1....... the two speed gear can only be engaged in one position at the time as they are at opposite end of the PTO shaft. At least NOT unless you did some re-engineering of the T case guts.

4. they may have used a secong T case to do exactly what is impossible above.....

Think of it as using the second T case to input 1.87 to one and output back to the rear axle 1.1.....sketch it out.... and that would account for the second T case.....yes the T case would have to be flipped..... take 1:87 out of the first T case at the usual rear axle output.... feed it into the second T case flipped backwards so it goes in to the usual rear axle output....convert it back to 1:1 and drive the rear axle from the normally front part of the T case that wouold accept the engine input....yeck draw a picture and you'll see..... or maybe it's time I went to bed.....

5. the slight difference in ratio front to back maybe cancelled out by using a different 10.50 casing tires.... somewhat taller. I base this on the fact that I have compared original 9 x16 V thread 1940 tires with modern 9x16 bar thread and 9x16 michelin and they all have significant rolling diameter.....The originalal 10:50 tires on Rob's HUP are HUGE compared to regular 1940 threads...... so is it possible they found and inflated hard a larger 10:50 tyre( brand unknown) to reduce the ratio differences.....???? notice the tire in the original picture is not flexing much....... even with all the concrete blocks at the rear.

Noneless fascinated with your project Bob.

Boob