14 hours ago, inline6 said:

There seems to be quite a large amount of movement of the new transmission yoke inside the tail of the transmission. I am concerned that the bushing in the tail shaft is excessively worn.

I'd fix this first. Besides the bushing, the fit of the splines should control play also. Are you sure that you have enough engagement?

15 hours ago, inline6 said:

I'll need to check for a wear specification. The 240SX transmission I the one thing on this whole car that I did not fully rebuild! Ugh!

Can't tell where the seal is riding in your picture but here is a picture of an old early 240Z shaft I picked up that had a groove from a worn seal, for reference. Gives an indication of factory engagement. The wear pattern in your picture is very weird.

No, I am investigating my transmission rear bushing. I have two of these on hand I bought years ago:


https://sales.omegamachine.com/Nissan_FS5W71C_Extension_Housing_Bushing_p/71411.htm

I slipped one onto the old prop shaft yoke and it fits nicely. Not loose and not tight. I will have more time later tonight to measure ID and the OD of the new yoke. I'd say the new yoke is deflecting a good 0.030" to 0.040" up and down (total) inside the tail of the transmission right now.

I am thinking I may need to pull the transmission tail section out of the car to do this bushing replacement.

Edited Tuesday at 07:11 PM2 days by inline6

I wouldn't want to split the transmission in the car. I would rather have the whole unit on the bench

IMHO, That is not a good idea moving forward. You won’t be able to access all points of concern if it’s not on the bench. I personally have gone through a couple of the “B” series and access is critical. You’re already half way there removing the shaft. Not to mention you’re going to have to rotate the tail shaft back and forth to remove and install. Personally I wouldn’t do it in the car. My 2cents.

Yeah I agree. So I took the day off today so I have the time to remove the transmission and replace the rear tail shaft bushing. Headed out to the garage shortly to start on that.