Which Tranny Do I Have??

So, the manual says either a TH350 or TH400. How do I tell? Time to change the pan gasket and filter, and I just don't trust the Jiffy Lube places to do this. I have a '77 L48 with a 3.08 rear.

Thanks,

I'm couris too I have a 75 stingray 350 auto trans........ ?

The TH350 is square except for one corner is on a 45 deg. and the TH400 is not square. Here are two links that show the pans.
http://www.tpiperformance.com/thdeepalpan.html
http://www.tpiperformance.com/th350deeppan.html
Good Luck
Jim

Thanks for the links, Jim!

Thanks for the help, too!

Goog Links looks like I have the 400, might even buy the pan ....................TKS.