Hi guys,
I’m chasing down a slight driveline vibration at cruise around 65, under accel or decel it’s not there, I can accelerate up to 65 and back the throttle off to just maintain 65 and there it is, enough to vibrate the rear view mirror. I’ve updated to a D60 with 3.74 gears and had a new driveshaft made by Spicer here locally, had it back to them to re-check balance. One thing I did notice is my new 1350 trans yoke was shorter then the original E body yoke, I can grab the driveshaft and feel the yoke has some movement in the trans so the bushing is possible a little worn. But I can’t help but think the shorter yoke may not be helping, sorry I can’t recall by how much it’s shorter but from memory it’s probably about an inch maybe???.

Question is, is there different length yokes??? Can I get a long yoke for my 727??