Jeep tranny acting up

[jullar99]

!990 Jeep Cherokee 192000 miles, 4.0L auto trans. After motor died while slowing for a stop sign, motor dies sometimes, restarted and put it back in D and the Jeep seemed to idle pretty rough, not like it was missing a cylinder, but a very rough idle. Left the light and it was all it could to pull away, like it was bogged down or something. Once I got up to speed it would not upshift. Almost like it was hung in 2nd gear or somthing. After setting for a few hours went out to drive it and it seemed to drive like nothing ever happened. Replaced tranny about 8 years ago with a like tranny, think it was a tranny made out of the country. Again, it seems to be running ok now but any ideas would be appreciated.

[fredjacksonsan]

For the engine quitting, I'd recommend replacing the Crankshaft Position Sensor; it's a common problem and there are many threads on it.

For the transmission, I'd suggest changing the fluid and filter; simply drop the pan, change the filter and refill (my 2000 GC takes about 5 quarts with pan drop).

Something else you may want to try is Auto-RX. It cleans your transmission over time. It helped my trans to shift a bit better - I got mine at 86K and now have almost 140K. I drop the pan and change fluid about every 30K miles and haven't had a problem.

[wwwildman]

Another thing you can look for on your trans problem--check the MAP sensor to make sure it is working properly and check the vacuum lines running to the MAP sensor. A bad MAP sensor or its vacuum lines leaking would cause the problem you described, especially the intermittant shifting problem starting from a red light.

Mike

[jullar99]

I had the Crank position sensor replaced about a year ago. Had the tranny flushed about the same time but did not get it serviced with a filter replacement or anything. That is my next thing i will probably do. I have considered a tranny additive. When it gets serviced i will have the vac lines and Map sensor checked alos. It has driven just fine for the last couple of days. Thanks for your replies.

[bmwgolfguy]

the stalling is more than likely the CPS. I just had mine replaced after about four or five episodes of stalling for no apparent reason. Runs fine now.

Good Luck!