I had to have my driveshaft cut for installation to my Moser 12 Bolt with a 1350 yoke. I heard that a good rule of thumb to assure proper length (i.e., after installation) is to have 1/2 inch to 1 inch of the yoke visible from the dust cover of the yoke to the driveshaft. Has anyone else heard this?

Also, what is the best way to determine if your drive shaft is the proper length and what are the specs for the amount of distance the yoke should travel on the transmission spline? I do not want to throw a shift or go over a bump and have my driveshaft hit my transmission.

Thanks!

 

The stock DS has about a 1/2" clearance on the output shaft. A big power adder setup requires 1" clearance. With the car sitting in its normal suspension loading, unbolt the rear u-joint caps. Starting from the point where the u-joint is fully seated in the pinion yoke, measure how far you can push the DS forward into the tranny. That is the clearance. Do not rely on visual inspection of the slider. The front of the slider can bottom out on the rear seal, or the inside end of the slider can bottom out on the end of the output shaft. Actually moving the DS into the tranny tailshaft housing is the way to measure.