Slip Yoke for a 727?

[Dusterdenovo]

I am trying to source a slip yoke for my new 727. It has a 30 spline output shaft. My 8 3/4 takes a 7290 U Joint so I was looking to do the same thing at the front end of the driveshaft.

I thought this would be straightforward, but the only piece I can find is at Jegs - an Inland Empire SY-727-7290 which specs out at the 30 spline and accepts the 7290.

My concern comes from the fact that everywhere else I look I am seeing different (29) spline counts or different yokes like 1350 etc. so I have no other options to compare to.

This will go behind a 458HP 408.

The Jegs webpage says "material: Cast, OEM Quality" so I'm wondering if this Inland Empire piece will fit the bill, should I be thinking of a different U Joint style or??

In the words of Lawrence Welk: "Thank you Boyz-a"

 

[Blue Grey Duster]

See what this Guy says. He has helped me a couple of times.
Cass -- Dr Differential
1(406) 883-4772

 

[SGBARRACUDA]

If you have a good drive line shop in your area, go to them. You can buy everything from them. I just had one built from scratch with 7290 front yoke and 7290 rear, including new u-joints. It cost me $275.00

 

[TrailBeast]

I am trying to source a slip yoke for my new 727. It has a 30 spline output shaft. My 8 3/4 takes a 7290 U Joint so I was looking to do the same thing at the front end of the driveshaft.

I thought this would be straightforward, but the only piece I can find is at Jegs - an Inland Empire SY-727-7290 which specs out at the 30 spline and accepts the 7290.

My concern comes from the fact that everywhere else I look I am seeing different (29) spline counts or different yokes like 1350 etc. so I have no other options to compare to.

This will go behind a 458HP 408.

The Jegs webpage says "material: Cast, OEM Quality" so I'm wondering if this Inland Empire piece will fit the bill, should I be thinking of a different U Joint style or??

In the words of Lawrence Welk: "Thank you Boyz-a"

DODGE 727 auto & A833 manual 7290 Series Slip Yoke 29/30 spline

The A-500 and A-518 use the larger A-727 style slip-yoke, so you might find a better deal going for one of the others instead of the 727 specifically.
When I did my 42RH swap in place of the 904 I made sure I got the yoke with it, as the 904 yoke won't fit the 42RH.(plus the 904 yoke wasn't a 7290 capable yoke and the 42RH and 46RH both are) because they are the same yoke.
I got the entire trans and converter with the yoke for almost what some of the places wanted for only the yoke.

Hope this helps.

 

[12many]

Just went through trying to source a 7260 slip yoke for my project, Neapco has all sorts. A slip yoke for a 7290 30 spline is their part# N729-3-1932X. There are other brands, no idea country of origin on any of them anymore. One with a 1.312x 30 spline, hub diameter of 1.68 I believe you need. An example with spec's here: www.northerndrivetrain.com/product/NEA-N729-3-1932X.html

 

[Dusterdenovo]

Thanks Guys, I will check all of these out.

Can anyone school me on "29/30" or "29 based on 30"? Mine has 30.

 

[12many]

Pretty sure the spline count on the trans output shaft is 30 and the slip yoke with 29 splines just has a missing raised outer spline, which means one inner spline is wider. All interchangeable one would think.

 

[Dusterdenovo]

Gotcha. Thanks!