Quick question for the Brain Trust re: A833 countershaft interchange

[WymanV]

Hey all,

It's that time in my '72 Duster project when the transmission gets new bearings & seals. Of course, in taking it apart dumbass broke the key out of the end of the shaft

Application is a A833 OD iron case from a '76 Scamp. The ones I've found so far state they fit up to '74 but I'm wondering if that's because post '74 A833OD generally had aluminum cases. Will a countershaft that states fit for a 64-74 4 speed be the same as the OD cast iron transmission or am I SOL?

Thanks

Ken

 

[townsend]

Looks like non overdrive 833's used countershaft #2464012.
Overdrive 833's used countershaft # 4028123.
All 833's in 1976 used #4028123.
Brewer's performance stocks the overdrive countershaft.

1975-1987 A833 COUNTERSHAFT ALL OVERDRIVE - Mopar A833 4-Speed Transmission & Component Specialists

1975-1987 A833 COUNTERSHAFT ALL OVERDRIVE

www.brewersperformance.com

 

[WymanV]

Thanks for that and not surprised. This is the third time in the past 2 weeks I've ordered from them and had I saw this coming I could've saved a bit on shipping, I think.

 

[RustyRatRod]

What? AJ hasn't come in here to write you a ten paragraph dissertation?

 

[A56]

What? AJ hasn't come in here to write you a ten paragraph dissertation?

He's probably at church.

 

[AJ/FormS]

I've been a Saturday-Sabbath guy for about 25 years now

Overdrive pins are shorter to allow for the front cup plug. I have not measured the front ends to see if they are the same as the standards. If they are then they can be used in the older boxes.
But
That key does nothing but keep the shaft from spinning.
Loc-tite will do that too.
Your choices are;
Stick the original shaft back into the box with a good key, and the broken part to keep in place, and send it.
or
if you lost the broken piece, use whatever, to keep it in place.
OR
What I have done, is flip the pin 180 and grind a new slot, badaboom, with a die-grinder. It doesn't have to be pretty, cuz nobody is ever gonna see it. The bonus to this is that, it flips the normal-wear surfaces as well. Just don't make the cut too deep.
BUT
If you have an OD box and try to use an Early long-pin, well, the front hole is loose to allow oil into there to be a noise reduction gimmick. Consequently, there has to be an expansion plug installed there, to prevent leaks. So, no room for a long pin and no loc-tite will last for long.
Now
your choices are;
1) shorten the pin, or
2) do what I did, which was to fabricate a steel bushing, and machine the od case to accept it; then size the hole for a light press-fit on the pin.. and thus you eliminate that IMO, dumb idea.