I see this question asked somewhat frequently, but never actually answered:
How far should a driveshaft yoke engage the output shaft of the tranny??
Almost without deviation the answer is given in terms or how much yoke should be showing beyond the tail housing seal.
that's all well and good, but does not answer the question.
Haw many inches of engagement should the yoke have on the spline??
For instance, my Muncie M20 is 3" shorter than the TH350 I am replacing.
If I use a driveshaft that is 3" longer than the old one, spline engagement would be the same.
But, If I found a shaft that was only 2 3/4" longer, the yoke engagement would be 1/4" less.
My original setup had about 1 1/2" or travel into the trans when the rear U-joint was disconnected.
That may be a bit much to begin with.
So, I ask: how many inches of spline engagement should a driveshaft yoke have on the splined tailshaft of the transmission?