tranny sliping

[cbremodel]

I just bought a 99 250,sc,7.3 automatic. 4x4 The guy said he had it rebuilt, wich is 1 of the reasons I bought it. it has a tc lock switch on it, 6 position TW chip and runs great. yesterday morning I left for work and it started sliping. It sliped 3 times on me before I got it back and parked it. I changed the tune to tow mode, stock and so on and there was no change. The fluid looks brand new, is full and not burnt. I hope I dont need a full rebuild,Thanks in advance for any help. Chris

[Black Pwrstroke]

I would give the guy who sold it to you a call and see who he had rebuild the tranny. Could have screwd somethin up when they rebuilding it.