Transmission Not Shifting?

Hey I have the same problem. On the same model and year. Mine changes into 2nd at around 2500 RPM when pulling away for the first time but then works fine. It does it after I park somewhere and first put it into D.

Did you ever figure out what the problem was?

Yup! Its the speed output sensor. Was about $70 to fix.

Thanks.

My son bought it for $100.00. So far the battery, radiator, has been replaced as well as the spark plugs, and plug wires, rotor and distribitor cap and oil, filter change. It starts up fine and idles fine but take it on the road and it will not shift from second to third unless you let it coast back down to 30mph and then you can feel it shift into 3rd and then into OD. Sometimes you drive it slowly building up speed and it will do okay. But once you stop it idles rough. The Fluid level is right, does not look like it has been changed in a long time. I thought maybe a vacuum hose or maybe change the transmission filter

Mil came on while driving and stopped down shifting to 1st. Scanned w/ cheap scanner and found p0700 stored. Cleared code and drove for a few days until mil came on again and problem returned. Repeated this procedure several times and found that with mil off, downshift was normal most of the time and with mil on there was no downshift almost all the time. Finally had it scanned w/snapon scanner to find code p1747 stored. I know there is a specific diag. Procedure for this code, but now the mil is on all the time and when I scan it there are no codes stored. To drive it I have to shift manually. I was wondering if the pcm or tcm might be bad and am thinking of having it scanned again.

I have a 1997 Jeep Grand Cherokee that seems to have a very similar problem as most people are having. My jeep will shift into 1st and second okay but when it does to third I have to rev the engine up to high rpm's before it clicks over, and usually more than one time. When its cold its worse. Now, when I try to go in reverse I have to start the car, let it warm up for a sec and then shift into reverse, sometimes its smooth and sometimes I have to rev the engine to make it jerk into reverse. The engine light is on and the trouble code is 37 and the OBDII code is p0740 or something to that effect. Please help!

First I thank you for your help. If this does fix my car I plan on donating more money to help you guys out.

I do have a question though. When I looked up P0740 it talked about "Relationship between engine and vehicle speeds indicated failure of torque convertor clutch lock-up system (TCC/PTU sol)." Will the (OS) sensor fix this problem also? For $18.00 at my local Autozone it is worth a shot and I will try it at least. I just want to make sure we are talking about the same thing.

-Jason

Drove to work, drove home from work would not shift out 1st gear. No mater what I did. Later that day went to store car worked just fine. Then about two weeks later, same thing but now will not come out of 1st no matter what I do. Can you help? Thanks. MIKE.

Transmission problem
1999 Jeep Cherokee 4 cyl Four Wheel Drive Automatic 150k miles

� � � � To whom this may concern, I've been a mechanic for over 35yrs. However during the early 90's I gave it up to become an O/O of an 18 wheeler.

Today (07/08/09) a friend asked me to check out his son's (James) 1999 Jeep Cherokee Laredo. It has a 4.0L 6cyl engine, 4 X 4 automatic transmission with a 14 bolt pan.

I took it for a test run and it won't shift out of 1st gear.
I dropped the pan (I noticed tranny fluid the inspection plate and trans body. Front main leak) and removed the filter. It was filthy and plugged up. I looked in the pan itself and there wasn't any chunks of medal, nor any clutch material. The magnet has a small amount of matter on it and it didn't feel sandy. The tranny fluid didn't smell burnt and appeared the color was ok.

I looked inside and didn't see any broken wires or anything weird.
I cleaned up the pan and tranny body, installed a new filter and gasket and poured in approx, 4.5 quarts of ATF+4.

Took it out for another test run and still the same problem.
As I was doing all this I was asking James how long the tranny was acting up. He danced around the question but, I finally got him to admit the tranny has been losing fluid since the 1st of the year and it� � � � � � � � d slip until he� � � � � � � � d toss in 3 or 4 quarts.

I believe the tranny is blown. However, since I haven� � � � � � � � t any test equipment to check out the electronics, it is possible a relay or a computer problem is the cause. Are there any tests I can perform w/o any expensive test equipment? I have test lights and a multi-meter.

Any help will be appreciated.

Thank you
Shal � � � � � � � � aam
AAPiY
Mike

P.S, until this economy improves, all I can afford to donate (at this time) is $5.00.

Sometimes it will not shift into fourth gear.

Yes I appreciate your help. I checked all the things you said to do, but it still won't shift into 4th.

Thanks, I appreciate the help.