Posted by Charlie on November 10, 1999 at 21:12:36:
In Reply to: M37 transmission questions for Cummins swap... posted by C. Garbee on November 10, 1999 at 17:01:42:
4.75" bearing retainer
1.00" 10 spline
BTW, my first try on my Clark 280VO resulted in the input shaft breaking. Wayne machine 1.00 10 splines which actually came out to 0.987". It didn't look particularly heat treated. I ended up replacing it with a 1.375" 10 spline. I suspect the M37 input shaft is stronger than the machined on Clark shaft, but 1.00" is a bit skinny for potentially 330 ft-lb. Well, if it breaks, you can always replace it with a SM420 which is 1.125" 10 spline. All you'll need is a new drive sleeve and some more holes in the back cover (get the Chevy pattern cover and then drill your Dodge holes).
Charlie