Slip and slide transmission
The linkage is critical to anything that transmission does. Period. End of story. Roger Wilco. Over and out. Find new informants. Some of the ones you have are idiots. If it's slipping that badly, The damage is done. It's time to pull it. It probably didn't show up before because you didn't have enough power to make it slip. Now you do. The Torqueflite transmission MUST have that throttle pressure linkage installed. Must, must, MUST, MUST!!!!! It's not like a Chevy and some Fords where you can throw the kickdown linkage or cable in the ditch......and even with them it's not a good idea, yet ALL the Chevy guys leave it off. Dumbasses. Not you. Them. You just didn't know. They have no excuse. lol That's the correct name for it. Throttle pressure linkage. It operates by manually increasing the throttle pressure as the gas pedal is depressed. More gas pedal, more throttle pressure. The purpose in increasing throttle pressure to the transmission is to increase the transmission's LINE PRESSURE so that the clutch packs are held more tightly together as more engine RPM (power) is transmitted through the transmission. Without that all important throttle pressure linkage to increase that line pressure, the clutch packs have very pressure holding them together and will slip. As I said, if yours is slipping as described, get the tools out. It's done. Once rebuilt, find the proper throttle pressure linkage. I would use the OEM stuff, as my opinion of the Lokar is not very good....and yes, I've seen and installed some for other people that just HAD to have it and I think it's junk. Chrysler got it RIGHT when it came to transmissions. Good luck!