Changing Tail Shaft Bushing

Fishing68 said
I had the same symptoms in 1968 barracuda I bought that has a 727 in it. Trying to solve it, I put new tires (with balancing) on it and then replaced the tail shaft bushing but the problem continued. Vibration over about 40 mph. I had a new (slightly longer) drive shaft built using the old ends. Voila- problem solved. Apparently the slip joint did not have enough overlap. I also had a leak that did not go away but later I found the leak was actually coming from the neutral safety switch which had its seal gone bad.

I've got about 1-5/8" yoke exposed past the tailshaft and have had a vibe since the driveshaft was made. Nowadays some driveshaft shops say only 1" exposed.

Kuz said
I couldn't find any relevant dimensions listed in the FSM or the online Torqueflight manuals I checked. I thought that was odd. So I checked a couple driveshaft shops, they are listing 1.558 as the OD for their 904 yokes. None listed any tolerances (+/- .001, etc.).

Chrysler 904 Transmission Yoke 7260 series

Spicer 2-3-8731X Trans Slip Yoke

And Denny’s, who supplied the yoke he’s using.

Denny's Driveshaft Slip yoke for Dodge Mopar 727 904 automatic and A833 manual transmission 26 and 30 spline output

I have that first yoke listed, it's 1.558. The original looking one that was on the driveshaft is 1.556. Neither one fits snugly into the trans.