Thread: Need Chevy Guys Help On Tranny Id

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I bought this 3 speed trans on Ebay to use in the el cheapo '23 T bucket. I intend on putting it behind the 5.7 Vortec I've got. I know the ratio selection isn't like a 4 or 5 speed, nor is the strength, but it is perfect for the '50 style rod I want to build, and I got it cheap, like $ 29.00, with brand new Hurst shifter. (ok, so shipping DID cost $ 90.00, but still not too bad)

Here is the problem. I haven't played with Chevy's in lots of years, so I don't know what this trans is. It was advertised as '64 to '67 Chevy Nova, and that is about it. I took some pictures tonight to post, thinking some of you could ID it for me. Here are the numbers and dimensions I get from it"

Case has a number that looks like 3748368, plus GM 74, and Ll271 also. The numbers could be different, as they are stamped and the 8.s look like 3's and so do the 6's.

The overall length from the flat surface where it bolts to the bellhousing and back to the end of the tailshaft is 21 inches. The tailshaft itself is 14 inches, so the main case is only 7 inches.

The round part of the snout that goes in the bellhousing hole is 4 1/4 inches, and the tip of the input shaft that goes into the pilot bearing is 5/8 inches.

The bolt holes where you bolt it to the bellhousing are 8 1/4 apart on the top two holes, and 9 1/4 apart on the bottom two. The top and bottom holes are 4 3/4 inches apart. It has 10 splines on the clutch portion of the input shaft.

I know this is probably a weak 6 cyl trans, but if it bolts up to a v8, that is all I need it to do. This will be a mild street rod, so hi performance is not important.

Any help you guys can give will be appreciated, and I am truly sorry about the hundreds of posts I have put on here bashing Chevy's. KIDDING, I'M JUST KIDDING.


Don