Hello all, i picked up this trans around 4 years back for a really good price and tried researching the info on it but I can’t find anything solid on it and each forum I read has conflicting info so I put it on the shelf for a later date. Well I finally am doing so spring cleaning and decided to pull it out and try to figure out what it is. The info I do know for certain is that early T10’s that are cast iron were built in the 60’s and have the same 10 spline input/27 spline output but the date codes for the main case and the tail shaft are stamped 72. There is no vin suffix’s stamped in the p***enger side pads at the top. Both the case and tail shaft are cast iron but the mid plate is aluminum and is stamped k2022. I’ve attached pics of all the casting numbers to reference. Any and all info is greatly appreciated.
Purely considering the "72" casting date I'm thinking that (may be) a Super T-10. Seems the first year for them was about 1974.
That’s been a majority of the info has pointed too, I’ve been looking for an catalog to confirm but those are scarce.
Jul 10, 2004 — Main case is cast iron, tail housing is aluminum. I understand that if it has nickel gears, they'll have a small drill mark in them as I believe they were cast iron case and a 1 inch counter shaft,
Too co**** an input shaft and output shaft to be a Super T-10. Super T-10 is a 26 spline input and uses a TH400 splined output that's 32 spline.
I have the 46-64 chevy parts book, which was revised in 8/74. It lists several 4 speeds for 63-64 cars, but they're all Muncies. An older version of the parts book might help? but yeah, they're scarce. gmpartswiki has scans of some, have you looked there?
ST-10s used a 26-spline input shaft with 32-spline output, same size as TH400 slip yoke. AS3-T10W is a wide ratio transmission ST10 schematic
Is 3/8 inch the same as 10mm? 10mm = just over 3/8 inch. 11mm = almost 7/16 inch. 12mm = almost 15/32 inch (= almost 1/2 inch) 13mm = just over 1/2 inch.
uh....look at the picture again, the drawing of the ST-10 is an ST-10, not a T-10. So yeah, it has the later metric threads that they started using mid 70s.
You are getting erroneous information here. I know because I bought a brand new borg Warner super T 10 in 1975. It is a special wide with a 2.64 first gear and a long cast iron tail shaft. Currently lives in my 57 Tbird continuously owned and driven by me since we built in 1971. Transmission was bought from Don Bigelow’s and sold to me by another member of this board my good friend Johnny Peters.
You're not talking standard Super T10's. Of course they'd make what you wanted on special order, but my '71 with a Super T10 had the fine spline input and th400 output shafts.
I am not entirely clear on whether the original poster has the co**** or fine spline T10 and I realize he doesn't believe he has a Super T10 but here's what might be some totally useless info ... I removed a Super T10 from a 1980 Z28 (350 cubes) ... the case was cast iron. I removed a Super T10 from a 1980 Corvette (also 350 cubes) and it had an aluminum case. I bought another Super T10 at a flea market that was supposed to be out of a late seventies Trans Am and it had an aluminum case. Based on my personal experience with these three, the two aluminum cases were both close ratio, the cast iron was wide ratio. These all had the fine spline input shaft. I actually enjoyed the car more with the close ratio.
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