98 Jeep Grand Cherokee 4.0 4×4 Auto NO POWER

I have this Jeep I’ve been fixing up and outfitting for offroading, but I’ve realized I have no low end torque. I had some problems with the O2 sensors about 4 months ago, but solved that. The Jeep has a hard time staying in 4th gear on the interstate. If I hit a 5 degree incline or a gust of wind while driving 70 MPH it kicks into 3rd gear.

I’ve also noticed that the temp runs hot. I stuck my finger in the washer fluid container the other day and it was steaming. It feels like I’m always driving around in a higher gear and need to downshift, but I’m actually in the low gear. I normally drive in 2WD beacuse it’s easier on the suspension / tires.

I have the following on the Jeep…
-31×10.50 MT
-4.5″ lift (didn’t drop the t-case)
-Throttle body spacer (doesn’t do jack)
-Expedition rack
-K&N air filter (doesn’t do jack)
-Some stereo junk
-rebuilt tranny about 2 years ago
-I’m currently getting 11-13 MPG
-No error codes (ABS light is on)
-No custom gearing
-Recently swapped engines
-Recently changed plugs / wires / rotor / starter / alternator / exhaust manifold

Anyone have any ideas why I feel like I’m driving a prius??? I can’t even spin the tires unless it’s raining and I’m on slick pavement!! I think right now I couldn’t even beat a geo metro in a race. If I turn on the AC I can’t even beat a 49cc scooter in a race. Maybe I need to switch to the V8. Thanks for the help.
I did replace the O2 sensors as well as the Catalytic converter about 6 months back.

Something about the heat just seems odd. This Jeep runs really hot, but the engine temp is generally cool. I’ve also noticed that tranny fluid bubbles out if I fill it to the normal level. I’ve been driving with it low because it doesn’t boil out this way (bad idea). It seems to be overheating.

Answers for The Question

  1. Hair Lover
  2. dr_cook76
  3. Doug K
  4. Josh B
  5. Seahorse