Transmission ?

[FB85C10]

can this be repaired, its a TH350C transmission:

[GRADYS Performance]

No, Because the dowel pin hole has been broken off the case, the engine to transmission alignment cannot be maintained even if welded back together. The case should be replaced.

[Desert1957]

350 Turbos should still not be that hard to find. Have some one swap the guts over to a new case. Or do it yourself, it is not that difficult.

Desert

[andrewmp6]

There is metal stitching but would cost more then a new trans would.I'd look for a new trans like you have or maybe upgrade to a 700r4.

[minitrail]

Just out of curiosity how did that happen? Looks like a recent (clean) break.

I agree look for a replacement.

[hatzie]

It's broken around the dowel pin. That's what aligns the center of the mainshaft. It can never be repaired such that the mainshaft alignment will be correct.
I assume the TH350 is otherwise almost new...
If you can find a worn out TH350C core you could swap the internals over. That's only worth it if the core is free, or darn close to free, and the one you have only has a few hundred miles on it.

I think I'd go the upgrade route with a decent TH700R4.

[SkinnyG]

It ~could~ be repaired, but you'd want to jig it up to make sure that the crank centerline and input centerline are perfect. This may require disassembling the case anyway, or just gamble and try your best to get it lined up in the truck.

I say see if a good welder near you can do it. TIG is best, but a spool gun could work.

Put it this way:

Right now it's messed.

If you are successful in welding it, at worst it will be less messed.

If you can't fix it, well - it was broken anyway.

You really don't have anything to lose by trying.