So I have a 97 xj with a 4.0 and an aw4. Today I was at a stop light and I went to accelerate, and the rpm's increased, but the jeep accelerated very slowly. So I dropped the shifter into the 1-2 position and it accelerated just fine. I replaced the tps and the problem still persists. Any ideas what it could be?

 

Feel like it's stuck in 4th gear? Or is it actually slipping, where you can rev the motor pretty high before moving?

 

It feels like its slipping.

 

And now this morning the TC wouldent lock up.

 

Fluid level and condition?

Not sure on your year, but there are 2 connectors that carry all the info between the TCU, shift solenoids, speed sensor etc that can get grungy inside. I would expect it to be worse in Florida where you are than in Arizona where I am.

Cruiser’s Trans Plug Refreshing

Over near the transmission dipstick tube are 2 rather large connectors. One is black and the other gray. These 2 connectors carry all the info between TPS, TCU, NSS, speed sensor, and transmission solenoids.
Unplug each one, visually inspect for corrosion or bent pins, spray them out with electrical contact cleaner and plug them back in.
　
Additionally, if your Jeep is an 87 to 90 Renix, it’s always a good idea to reach up under the glovebox area and unplug the connector to the TCU and spray it out along with the receptacle of the TCU. While you’re there, find the fuse right in that area for the TCU. Remove it and spray out it’s receptacle and clean any corrosion from the fuse.
Revised 9-10-2012

 

Fluid level and color is good. I'll try cleaning the connections. Could it be a shift solenoid?

 

Maybe.

Have YOU ever changed the fluid? If so, how long ago?

Fluid smell like burned electical smell?

 

Fluid/filter was changed less than a year ago by me. And the fluid does not have a burnt electrical smell.

I Dont know if this matters, but this happened right after my battery died and I replaced it.

 

Alright so i fixed it. I went and inspected the two big plugs on the passenger side of the engine bay that are for the tranny, and i found a wire that had pulled out of the plug. I stripped the wire and shoved it back in the plug, and shes runnin like a champ again!

 

Well, whaddy know!!!!!