I’m building a little 1972 resto mod for someone. He wants to keep it automatic . I did some searching and realized the 83 turbo automatics had a lock up torque converter - badly needed really . I acquired one and on install DS from the 72 wouldn’t fit ( 24 spline -24mm) . The 83 zxt( at least this one) has a 26 spline output -26mm OD. 

I sold my last t5 DS and it had the oddball yoke - I believe is 26 spline . I’ve talked to many people that automatics and no one has one with a 24 spline output .

Ordered a new yoke from Z Car Depot that they said had 26 spline . Came today and it was 24 spline 😡

I know autos are spoken about much , but  maybe someone knows something 

Could someone have pulled the wrong part for you? They clearly show their other yoke is 24 spline. 

Just as an aside, I did a search on Summit Racing for 26 spline yokes. There are plenty of hits, but I don't know if any of them would work. The only yoke I have lying about is from when I tore up the u-joints on my driveshaft 6 years ago.

Well I have answers and have to fess up of a mistake . The yoke sent to me was only 24 splines but skips teeth at 180 degrees . They call that a 26 spline I guess . I didn’t at the time check the actual measurement of the yoke and ASSumed it wouldn’t be right , but it is .

So the 83 turbo - regardless of manual or automatic have a larger output shaft with 26 splines . I had no clue . 

Good to know