Did a motor swap on a 1998 dodge ram 1500 5.9 4x4. Now it acts like Tranny isn't shifting and is staying in 3rd.

Asked by Jul 29, 2015 at 10:17 AM about the 1998 Dodge Ram 1500 2 Dr ST 4WD Extended Cab SB

Question type: General

Did motor swap.  One wiring harness plug
isn't plugged in can't seem to find it.  Trans
acts as if it isn't shifting. Acts like its in 4
wheel has more torque and no real pickup.  
I'm lost as to if it's a vacuum missing or
harness wire or the linkage or if computer
needs reset.  Please help

2 Answers

217,245

Did you get the same transmission model that you pulled out of the car? Hooking up the wiring harness will help as most newer transmissions are electronically controlled.

Motor stayed and yes was same year make and model. I believe it may have pins broke on transmission shift solenoid. As my brother yanked it loose cause motor was hung up when hoisting it out.

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