I have a 1999 Isuzu Rodeo LS, 2WD/V6/Automatic (same vehicle as a Honda Passport, so I have crossposted to both Isuzu and Honda) that has a strange transmission issue. I want to know if anyone has ever seen anything like this, or has any suggestions.
Every so often, with absolutely no warning, frequency, or anything causing it, the Rodeo will start shifting very rough. It will buck when switching gears, either upshifting or downshifting. Most time shutting down the Rodeo and leaving it for about 5 minutes will cause it to start working normally again. Sometimes the issue will happen when I first start driving it, other times it happens while I'm driving it - I may be driving along fine, come to a stoplight, and when I start going again it will start shifting rough.
It has about 91,000 miles on it. I just replaced the transmission filter and fluid and that didn't make a difference. Right now it's running fine, so I'm not about to take it to a repair shop until it starts happening again.
The strangest thing is that this also happened with a car I had previously (2000 Saturn LS2). The transmission shop couldn't find anything wrong with the transmission, but suggested I replace the Throttle Position Sensor. That is only sold with the throttle body ($300+) so I ended up living with the issue and trading it in before it was fixed, so I don't know if that was the cause of the problem in the Saturn or not.
Thanks for any and all suggestions, Jake Williams Madison, Alabama