Odd ball transmission identification and fix

[MarineGreen]

What's up guys. Got this transmission in my pickup and i discovered a cracked bearing retainer. Problem is i can't even find any information about it, its got a 5th bolt ear on top and a 7 bolt side cover.

I need a new bearing retainer because it's split down the sleeve the input shaft goes into. I'm starting to think i am going to have to get a machine shop to literally make one to match.

Casting number on the case is GM 3 6273262

Bearing retainer casting is GM 4 3925635

Bellhousing casting number is GM 6263756

And pictures

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Any help or tips what to do is very appreciated. Thanks y'all

 

[HotRodPC]

Kinda looking like a Saginaw 3 speed. Was this a 3 on tree truck? Can we at least get a hint if it's a 3 speed or 4 speed?

 

[HotRodPC]

Need more full pics of the sides of it. Not so zoomed in where we can see the whole transmission and it's side cover.

 

[MarineGreen]

Yes it is a 3 speed. Factory column shift. It is difficult to see as it is still installed in the truck

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[Honky Kong jr]

A833 thingy isn’t it?

 

[HotRodPC]

Nope, not an A833. By the looks, I'm gonna say with 98% certainty, it's a fully synchronized Saginaw. It's obviously not a Muncie, and by the lack of bolts on the side cover I'd say Saginaw, if it were a Borg Warner it would have more bolts on the side cover. I'm pretty certain that there were some Saggy's that had that 5 bolt mounting hole too.

 

[MarineGreen]

It has 7 side cover bolts and it is fully synchronized. Just lost as what to do with the throwout bearing retainer. I can find the ones with the smaller diameter for cars and the SM465 all day but not this.

 

[Swims350]

how about buy the smaller car one and then buy the bellhousing for a car to make it match? I had a 4 speed saginaw car trans with the small bearing retainer and a bellhousing for a 3 speed truck big bearing retainer hole and they told me to just swap on a truck big bearing retainer and run the bell housing I had

 

[bucket]

Wow! Cool! 3 on the tree and 4x4! If I had to guess, it has that 5th mounting bolt because it's a 4x4 application.

Is it not the same bearing retainer used in a 2wd truck application? I was under the impression that they used the larger pilot hole like the sm465.

 

[436'd skylark]

I've got a Saginaw bearing retainer hanging in my shop. I'll check when i get home in a few days.

 

[crazy4offroad]

One of those pics looks like it has a top loader shifter like a floor shift. Might be an SM435 if it is.
EDIT nevermind, I see the shifter rods on the side.

 

[MarineGreen]

Wow! Cool! 3 on the tree and 4x4! If I had to guess, it has that 5th mounting bolt because it's a 4x4 application.

Is it not the same bearing retainer used in a 2wd truck application? I was under the impression that they used the larger pilot hole like the sm465.

Its also a 350! I'm pretty sure the 2wd is the same retainer but this one has a smaller bolt pattern then the sm465, i think its the same pattern as the car type but diameter is wrong

 

[bucket]

Its also a 350! I'm pretty sure the 2wd is the same retainer but this one has a smaller bolt pattern then the sm465, i think its the same pattern as the car type but diameter is wrong

If you find a source for a 3 speed saginaw retainer for a truck application, please post it up!

You have any pictures of your truck? It sounds really cool.

 

[mmerlinn]

I know this is an old thread but apparently the OPs question was never answered. Just in case someone in the future has the same problem I signed up and am answering his question.

What the OP has is an SM330 transmission. It looks very much like a Saginaw but is SLIGHTLY bigger and considerably stronger. It is relatively rare.

I am assuming that the OP has fixed his transmission. At the very least he never bought one of the many used retainers for it that I have in stock.