I called the Tremec distributor and he gave me the dimensions of the pin (.2 x 1"). Found a 3/16 x 1" at the Ace Hardware and knocked it in. Seemed to fit just fine, but haven't driven it yet. The big pain is having to take the seats, carpet and tunnel out to get at the thing. Also managed to fish out the old pin from the bottom of the pan with a retriever magnet. Wonder what will be next on the list of things to fix
