Originally Posted by csk
From a bad experience with out of balance driveshafts, the only company that can spin a shaft at the desired rpm is Mark Williams, as one example of my getting the SHAFT LOL, my Strange engineering shaft was only spun up to 500 rpm , thats as fast as they can spin them, after LOTS of wasted money I call MW & they solved my vibration problems & tailshaft bushing problems


This was an issue for me too. I just ordered a 4 inch bonded aluminum driveshaft with their forged yoke and 1350 joints from them. It wasn't cheap, but it's Critical Speed is nearly 10000 rpm.

Between the old Strange driveshaft and the chattering, clunking Eaton TruTrac being replaced with Dr Diff's new and improved TruTrac 2, I hope to have eliminated my mystery vibration that only occurred from 98 mph on up. My '68's driveshaft is pretty long to begin with.

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)