I own a 2005 Jeep GC Laredo 3.7L v6 45RFE transmission
170,000 miles. I'm from Mass and drove down to New Jersey last weekend with no problem. The next day I was driving about 30 mph on a side road and my engine starting revving up like it was in neutral reaching 2500-3500 rpm and was stuck in second gear. The +/- option to shift gears/ overdrive on the stick shift also stopped working completely. The normal jeep "clunk" sound when shifting from park to drive or vice versa was noticeably louder and heavy. I had the memory card read at AutoZone (because it was a Sunday and no one else was open) and it was a p0717 issue. I know that has to do with the input speed sensor
sending no signal to tell the transmission
when to shift gears. Check Engine light also came on. I tried restarting the car, giving it an hour to rest and driving it again, same thing. So I figured I would take it to a transmission specialist. He let the car sit for a day or two then looked at it and drove it and couldn't recreate the issue. He said nothing out of the ordinary happened for him, but 2 days before that I couldn't drive over 30 mph without the engine going crazy and no shifting occurring. He said its possibly a wiring issue that is intermittently cutting off the sensor signal, or it could be a problem with the actual sensor but he has no way of telling unless the issue can be recreated. I'm weary that its a total circuit or computer issue.
I have seen other posts from people with somewhat similar sensor error issues but not close enough to be able to derive an answer. I know jeep had a transmission
recall back in 05 that had to do with fluid leaking and sometimes destroying the tranny but I don't think that the recall has to do with the problem and the dealer that performed the work for the recall for the previous owner is out of business. Meanwhile I had to go back to Mass to make work and my car is still in Jersey so I can't be down there. The mechanic said if he can't recreate the issue that I have three options: Replace the sensor, hope that this was in fact the issue and it fixes the problem. Take it to either a dealer or an electrical specialist to see if the computer or wiring is the culprit, or just drive it off the lot and hope it was a one time anomaly. This is stressful because I'm not physically in the same state as the car and have to conduct this process over the phone. On a side note, the day this started happening the AC worked fine but was making a weird low almost farting or whirring type noise and the bottom of the car had intense fluid leaking from it when the AC was turned on. I will also say that the car had been driven a lot and it was incredibly hot out in this 4 or 5 day stretch. Any help, advise, or comments are greatly appreciated because I'm lost.