So my trans is slipping on the 3-4 shift under heavy load and jumping into limp mode. How much does it cost for a new/rebuilt one? Im not talking about patching it up like ram seems like to do under warranty work, but a full replacement or rebuild. I want it done right and I want a good warranty for it. About 4 years ago we were quoted $3800 for rebuilding a 68rfe, which I understand is really closely related to the unit behind the 6.4 hemi. A couple years later we were quoted $4800. Another shop recently said $6800. I've seen guys post on here over $7k. I'm pretty sick to pay so much for repairs on a truck that's not even paid for yet, but I cant talk myself into starting over on new payments.