Rebn

i just picked up my first Cummins. 1996 Cummins 12 Valve with 233k Miles. Mechanically sound Body is hell. But i bought a southern 96 1500 for the body im about 7grand into this project, Well i was driving the cummins home from work today, Stopped at a light took off fine got to about 45-50Mph It didnt feel like the trans slipped, Felt more like it just changed gears my rpms went a high, More so it felt like i hit the OD button the dash then it went back to normal and my rpms went back down, It did this twice in a row then was fine for the rest of the 25min drive home. I even messed with it driving, Shifting it in and out slow speed high speed, I got on it hard. I know these 12v's dont have much Nut off the line. i just dont want to put all this work into changing the bodys over and have my tranny go. keep in mind when this happened i was driving normal. Not trying to get it to down shift to get up and go.