727 trans 19 spline crisis

[bmoparmofo]

Hi, I just decided to look at the rebuilt trans for my charger only to find out its a "66" 19 spline trans by sounting the teeth on the shaft that sticks out the furthest on the shaft for the converter, there is another set of teeth behind it with 28 or so teeth? ( I guess thats the right way to tell?) I read somewhere here that it needs some kind of a bolt on yolk of some sort  as well? Not sure exactly what all that is about. I just won a 24 spline converter on ebay  I figured, what are the odds that I could have the only year lever trans that could shaft me (literally)? This thing is already rebuilt, am I in for a nightmare trying to get a stall converter for it? Also whats with the yolk thing? The motor is a 383 .030, 10:1, 495 lift, 268 duration. I doubt its economical to have the shaft switched and still not sure what the yolk thing was about. PLease let me know any thoughts you have. I guess I'm going to offer the guy on ebay money for a relisting fee and see if he will take it. Thanks.

[RD]

it may seem like it fits, but it doesnt fit correctly. it wont work and you will have wasted money on your transmission rebuild and converter at the same time.

yolk is at teh end of the transmission (tailshaft housing).  There were three different styles:

1. parking brake drum
2. bolt on yoke
3. slip/slide in yoke

[bmoparmofo]

The front ring of teeth is the correct one to count for the 19 or 24 teeth right? I'll have to look at the tail of the trans and see about the yolk. All 1966 727's have  abolt on yolk though? Thanks for the info.

[bmoparmofo]

Also anyone know of a decent 19 spline stall converter out there?

[John_Kunkel]

All '65 and later 727's have the same 30-spline output shaft that takes a slip yoke. In passenger cars only the '64 and earlier 727's had the bolt-on yoke.

To my knowledge, TCI is the only one marketing a performance 19-spline converter. It would be wiser to convert the trans you have to 24-spline, it only requires two parts to change it over.

[375instroke]

'65 was the first year for slip yokes, with I believe C-bodies still using the ball and trunnion setup for one more year, but they all still used cables for the shifting, so if you have levers on the trans, you will have a slip yoke.  I do see that TCI has 19 spline converters.  What would be wrong with using one of them, besides your eBay problem?

[375instroke]

You might want to read this article:
A Simple Parts Swap Puts A High-Stall Converter In Your Early 727 Torqueflite

[bmoparmofo]

Thanks, yes, I'm looking into the tci 19 spline converters. The ebay guy was cool. Thanks for the input on this.