Originally Posted by tillery
Not the same. A 400 yoke is diff spline and the case is overall diff.
Some th400's came with 27 spline just like the th350.
If the driveshaft is for a short th400 and a short th350 the yoke needs to be changed. All short th400's have 32 spline outputs.
Long th400's have both 27 and 32 spline outputs.
I don't understand the guessing game going on here, measure the damn thing, thats the answer.