I'm currently re-sealing potential leak area on a '67 TH400. Did the Governor, Shift shaft, Speedo, now on the tail shaft seal.
The tail shaft bushing (with yoke installed) has some noticeable slop. I figured 'might as well' replace the bushing and seal at the same time. In searching for the bushing, I can't find the original one with the grooves & drain holes at 3 and 9 0clock, The replacements just have the grooves. I wondering if this is an 'universal upgrade' or are the original style ones still out there?
Would the newer style ones restrict more fluid from seal area? In stead of just jumping into this I figured it's better to ask and get advise from others that have already done this job.
Thanks,
Ed

 

FYI, if you are just putting the yoke in the tailshaft without the output shaft in place, you will see a lot of wobble.

 

The drive shaft was installed. Had the U-Joints replaced and re installed the shaft. That's when I first noticed it.

 

The lube holes don’t matter on a 400, the rear bushing is lubed by splash oil. Look at the extension housing, there are no holes for lube oil. There is a groove and “funnel” to catch and direct oil to the bushing. The hole at the very bottom of the seal bore is a drain to direct whatever oil seeps past the bushing back into the pan.

 

Ok, thank you

 

Note that replacement of the bushing requires Kent Moore swaging tool J21465-10. The two little pins on the end of this tool fit into the grooves in the bearing and when you squeeze the handles it dimples the bushing to lock it into the tailhousing.

 

That's probably what I'm seeing (the dimples) at 3&9 o'clock inside the bushing and thought they were drain holes.
I'll research that tool too.
Thanks Joe