I'm getting my transmission rebuilt I know shepard is good does anyone have any experience with RIPtrans or Jackstransmission?

 

Never dealt with Jacks, but the guy at T.R.E. is very knowledgeable and will be more than happy to talk to you for 30+ minutes about your trans.

You could also look at the Bushwacker by Buschur Racing. Never heard a bad thing about them, and I'm ordering one on the 1st.

IMO - TRE, Shep, BR, you can't go wrong with either.