brianbeez67

Looking to put a TH350 in my newly rebuilt 330. Was wondering what brands you guys would use, Thanks for the help

matt69olds

Find a local builder. You don’t need anything fancy for a 330 engine. No need to pay premium prices for a name brand high dollar builder.

Any shop worth a gallon of solvent could build a 350 trans. There just isn’t much to them. Parts are getting a little hard to find but they are out there.

Do you have a core, or could you find one? If your comfortable building and engine, a 350!is pretty easy.

brianbeez67

Found a TH350 trans with a 30 spline output shaft. Does anyone know what my 2 speed Jetaway has?

matt69olds

Every 200,250,350,2004r,700,4L60E and most Powerglides, plus most manual transmissions all used a 27 spline shaft. The 400 and a few heavy duty 4 speed Muncie trans used a 32 spline. Are you sure your counting correctly? I don’t recall every seeing a 2wd GM trans with either of tjosev2 spline counts.

brianbeez67

After some research I went online to JEGS and found a TH350 in my price range, the fella said the output shaft was a 30 spline.
Good thing I asked you guys and so far did not make a 1100$ mistake

Thanks for the assist

RetroRanger

Yeah thats some kind of listing error

they show 30” spline ?

Like matt said call around find a local shop that will rebuild, they may even have a bop th350 they can rebuild for you. Then put a wanted ad on here browse cl or fbmarketplace they pop up regularly youll want a BOP bellhousing th350. Im not sure if 350s have different tail lengths but maybe some else can chime in on that. The chevy pattern th350 would need an adapter to fit your 330.

a couple weeks ago two RTR 350s were listed on here one in TN and one in CT.

jegs screen cap below shows 30” spline ?

brianbeez67

I did see that 30, there but inches made no sense. But 30 spline does, “damm”

RetroRanger

They also used mm too, making me believe its a listing error, plus if matt says he never seen a 30 spline thats good enough for me