So I just had to replace the engine harness in my 1999 24v Dodge 2500 and after i hooked it up it would start dropping out of lock up, Thought negative battery cables were the problem replaced those and it still happens. I'll be going down the road and itll happen my rpms will go up about 200rpms and I loose speed. Thanks for any input really annoying having to drive 50 miles a day to work on the interstate with it doing this. 

Go to the Articles,  click on 24 valve 2ed generation,  click on transmission and transfer case,  now find the write up at the bottom called torque converter lock/unlock issues.  This is a good place to start. 

Thanks for the advice ill go check that now

Were you able to get your problem figured out?