Transmission type

[RatRoddin4life]

Make

Chevy

Model

2-door sedan

Year

1930

Miles

123456

Engine

454

I have a transmission here we bought with our big block 454 bored into a 496 Stroker. I am trying to distinguish what the transmission is but I’m finding things that lead to three different types! Help!

 

[billr]

I'm pretty sure that is a Muncie "M2x" of some type; M21, M22, etc. Take of the shift cover and see if the gears have straight teeth or helical teeth, start there. The grooves on the input spline may mean something, but maybe not, as that shaft looks gold-colored and may be an aftermarket piece. Just search online for "muncie trans" or "muncie 4-speed", you will find oodles of info.

If you are going to use that trans on the engine, step up to a dual-disc clutch. The BBC likes to eat up single-disc clutches...

Well, I just peeked online. It seems the Muncie M-series was derived from the Borg-Warner T-10 and they look very similar. Is the case cast-iron? If so, then I think it is more likely a T-10; I'm thinking the Muncies were all aluminum cases. Again, lots of info available on either trans family!

 

[RatRoddin4life]

That’s where I have gotten myself so confused, I have been looking it up and there’s similarities to the Borgen, Muncie and Seg! It is all cast iron but the side plate is bolted by 7 bolts, All pullys are on the side plate.

 

[billr]

Browsing more online Muncie info, I think I was wrong about some having straight gear teeth. The M22 has a lesser angle on the teeth, but still helix.

Still no confirmation that all the Muncies had aluminum cases.

 

[billr]

OK, last comment (I think!). There are numbers cast into the case (can't read in poor photos) that will positively identify it.

 

[grcauto]

That thing ain't stamped or have an ID plate?

 

[stu]

Definite Muncie.

 

[paulo57509]

Check the casting numbers on the case and count the splines. This will tell you if its a Muncie or not.

Muncie 4 Speed Transmissions