Ball & Trunnion differences

dmoore · Oct 28, 2020

Lately I have noticed two diff ball & trunnion faces on 64 Sport Fury auto & 65 Satellite 4-speed cars. Can anyone tell me if auto and 4-speed are the reason?

dmoore · Oct 28, 2020

The one on the right was in my 64 Sport Fury, console auto. The one on the left was provided with my newly built 727 auto. My original ball & trunnion face bolts up flush with no issues. Car is as smooth as it was with the original piece.

dmoore · Oct 28, 2020

I pulled this pic of a ball & trunnion from a 65 Satellite 4-speed car over at Mopart's. You can see how the above piece on left would accept it. However both bolt up flush. Not sure if it's a 4 -speed, auto thing or what? I'm sure someone will chime in soon! Thanks!

moparsteve636 · Oct 28, 2020

I have found that the difference is the larger bolt pattern is if it was a big block, or a small block! As for the 4 speed the only ones I've had they had the large pattern! But then knowing mother mopar it wasn't set in stone! What ever was handy at the time!

dmoore · Oct 28, 2020

The stud pattern is the same.

barbee6043 · Oct 29, 2020

Diameter of driveshaft maybe??

Centerline · Oct 29, 2020

You can tell by the pic that my '64 Polara has the one with the indentations. This is the stock trans that was in this big block car from the factory and the stock ball and trunion unit.

dmoore · Oct 29, 2020

barbee6043 said:
Diameter of driveshaft maybe??

While I have not measured either one, 4-speed or auto I would say something to do with the abrupt loading and unloading of torque from a 4 -speed. Of course this is pure speculation. Someone will chime in soon with a positive take.

69Coronetrt · Oct 29, 2020

The parts book shows no difference based on transmissions. Check date codes if possible. It could be an early/late design change.

dmoore · Nov 1, 2020

I believe you are correct..checked parts book as well. Thank you for the reply!

khryslerkid · Nov 1, 2020

I found out there are different size flanges trying to replace the boot. Here's a couple of links to my build thread while doing this. The third link is the info I found and who I delt with on parts.

https://www.forbbodiesonly.com/mopa...p-new-residence.114133/page-14#post-910763228

https://www.forbbodiesonly.com/mopa...p-new-residence.114133/page-15#post-910763239

https://www.forbbodiesonly.com/mopa...p-new-residence.114133/page-16#post-910765129

Ball & Trunnion differences

dmoore

Mopar to the end

dmoore

Mopar to the end

dmoore

Mopar to the end

moparsteve636

Well-Known Member

dmoore

Mopar to the end

barbee6043

Well-Known Member

Centerline

Well-Known Member

dmoore

Mopar to the end

69Coronetrt

Well-Known Member

dmoore

Mopar to the end

khryslerkid

FBBO Gold Member

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