Originally Posted By MoparJ
Originally Posted By RapidRobert
the first thing I would do right now is pull the rear ujoint caps & move the shaft all the way forward & measure the distance back to where the caps seat in the yoke.


I will check that out. About 1.75" exposed of snout and no less than 5/8 of snout is engaged in trans.


I was told you want the driveshaft to be able to slide 1" forward before it bottoms out in the trans.

There is a tool available to R&R the rear trans bushing without pulling the trans. It cost about $150. I bought one and did mine chasing a similar high speed vibration. I have yet to find it, and it only occurs above 95mph.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)