Automatic Transmission Control Module problems of the 2001 Jeep Grand Cherokee

The engine revved at a very high rpms when starting. When changing gears it made a loud clung sound and wanted to lunge into that direction. The vehicle has never shifted properly between gears. It was almost like it was slipping, and then finding the right gear. It was not a smooth transmission either. Since I purchased the vehicle a little over 1-1/2 years ago the car has been in the shop more than 15 times. The dealers could not find the cause of the problem. I had to replace a transmission sensor, 02 sensor, sun roof, rear end, and cd player. The heater blend door had to be replaced , which didn't sound expensive, but the fix was to remove the entire heater plenum and replace the broken door, stop and drive assembly. Cost $890. 00.

Transmission/powertrain/electrical components/brakes at just over 36,000 miles the powertrain/transmission module failed. There were three minor incidents where when I was accelerating normal into traffic the transmission roared and spun, but the vehicle would not move, I shifted into neutral after letting up on the gas, then shifted back into drive and the transmission "kicked in". The fourth time this occurred, however, was when I was accelerating to merge onto the freeway, the vehicle lost power and I had to coast over to the shoulder of the highway onramp and the vehicle was towed to the dealership. A sensor or transmission control module was replaced at a cost in excess of $500 (just out of warranty) to me. At 50,000 miles while driving along the road, I heard a loud bang and thought I had a blowout of a tire. It was not the tire however, it was the passenger side power window. Something inside the door popped and the window fell down in the door. Another bill in excell of $500. Now at 63,001 miles, the transmission once again just would not go into gear. As I tried to accelerate off my street, the engine whined as though I were in neutral but it would not kick in. It would only go in reverse, none of the forward gears would make the car go forward. It was towed to our mechanic who says the entire transmission must now be replaced.

When driving and applying brakes vehicle will shake and shimmy very hard. Consumer believes that rotors are defective, the dealer found that the rotors were warped and replaced them under warranty, there is an odor and humming sound coming from the a/c when turning on the system, the deler has been unable to duplicate the problem, the vehicle experienced low idle while in gear, the dealer found it necessary to flash the pcm, exhaust manifold was loose causing it to make a rattling noise.