OK I'm having problems with it not shifting until I get to between 3000 and 4100 rpms I figured it was the filter but now that I got it apart the filter don't look bad, the motor n tranny are out of an 89 limited but currently in my 87 pioneer, 3.55 gears and 33's.... I've been driving it with the power/comfort switch in the power setting and in 3rd rather than in D because I don't like it going into overdrive with my gearing and tire combo but get the same results even in comfort setting and in D..... any ideas other than the tranny going out????

 

search kick down cable adjustmen ,,,

 

when my '95 did that (more than once), I replaced the speed sensor on the side of the transfer case. worked great for awhile, then did it again, went to Car Quest, got another one. That one worked for awhile, and then it went goofy again. At that point, I had Car Quest order me one from MOPAR. As I went to pick it up at the parts house, I was talking to the Manager when it was delivered from dealer. Looked at the bag, and it was the exact same part that Car Quest had sold me on numerous occassions. It's been in there for about two years with no problems. I have no idea what the difference is, as the part was EXACTLY the same. My advice (worth every dime, it's free!) is to go to Car Quest or NAPA and get one. That's just the way it worked for me. Hopefully it works for you. I thought for awhile I had a manual valve body. Good Luck

 

The #1 suspect is a bad throttle position sensor. Located on the throttle body. The TPS is directly involved with transmission shifting characteristics. I answer at least a half a dozen of these threads every week and often, the delayed shifting is because of the TPS. Failure is very common, especially on the 87-90

They can be tested and they aren't particularly expensive or difficult to replace.


RENIX TPS
(Thanks to Joe Peters from NAXJA for this information)

MANUAL TRANSMISSION:

RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body. This manual transmission vehicle TPS provides data input to the ECU. The manual transmission TPS has three wires in the connector. Wire "A" is positive. Wire "D" is ground. Remove the three-wire connector from the TPS. Key ON, measure voltage from "A" positive to "D" ground. Note the voltage reading--this is your REFERENCE voltage. Now, reconnect the three-wire connector to the TPS. Key ON, back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. Adjust the TPS until you have achieved this percentage, if you can't achieve the correct output voltage replace the TPS and start over.

AUTOMATIC TRANSMISSION:

RENIX automatic transmission equipped XJs have a TPS with two connectors. There is a three-wire connector, same as the manual transmission vehicles have, and it is tested the same as the manual transmission equipped vehicles--FOR ENGINE MANAGEMENT RELATED ISSUES. However, the automatic TPS also has a four-wire connector. For the automatic transmission equipped vehicles the four-wire connector provides data to the TCU. Disconnect the four-wire connector. Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your REFERENCE voltage. Now, reconnect the four-wire connector to the TPS. Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage. Adjust the TPS until you have achieved this percentage, if you can't replace the TPS and start over.

So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and the other side feeds the TCU. If you have TRANSMISSION issues check the four-wire connector side of the TPS. If you have ENGINE issues check the three-wire connector side of the TPS.

For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is stupid expensive. You can substitute the autom

 

DUDE YOUR A F***IN LIFE SAVER!!!!! I NEVER IN MY LIFE WOULD'VE THOUGHT TO LOOK AT THE TB FOR TRANSMISSION PROBLEMS!!!!! THANK YOU SOOOOO MUCH!!! Luckily I had a spare laying around!!! Bad part is I just pretty much wasted 60 bucks on a filter and fluid cause my filter looks good and the fluid was nice and clean..... but some dumb*** at autozone told me that it was bad and that the fluid was also and bad fluid will cause it to shift late!!! I don't know Jack **it bout transmissions and he said he did so I believed him!!!! Only thing is.... COULD YOU PLEASE INFORM ME BEFORE I HAVE A PROBLEM NEXT TIME!!!!!! HAHAHAHA J/K... THANK YOU REALLY IS AN UNDERSTATEMENT!!!!

 

Hey man, glad I could help! It is nice for all of us that try to help to hear a sincere thanks once in a while.

I keep trying to get the word out about the importance of the throttle position sensor for ANY transmission shifting problems. It is often overlooked and because it is located on the throttle body, people have a hard time connecting it to the tranny.

But the AW4 is an electronically controlled transmission, and it counts on input signals from things like the TCU and.........the throttle position sensor.

Rock on.

 

i have a 96 jeep lerado some days it would shift intwo over drive some days its wasent dealer told me they needed to put new transmission in so they put a referbushed one well when they put the new one in took it down the road it wont shift in over drive and my self just put a new crank sensor and throttle sensor on it 3 mounths pryer to tranny swop they even tryed new computer the thought it was that but after swaping still nothing so put new computer in i am clueless and so is shop any sudjesttion of what it could be...and bye the way there is no codes on nether befor or now like i said some times after driveing it it would shift but after tranny shop it hasent shifted in over drive

 

You might consider starting a new thread to attract more replies.

 

X2 there^ bud. Your 96 is a bit different. OP, you might take a look at the tps adjustment in my sig, (for Renix Jeeps)

 

When you start your thread include that -^-above. Predators fleecing people who don't know better ...just sucks. I would think if the dealer took your money to put in a tranny, it should shift.

 

Punctuation and capitalization will get you more help from us old farts who get headaches reading stuff like that, too.

 

I'm having enough trouble trying to read a laptop with my head tilted backwards so I can see through the bottom lens of these %^& bifocals.

 

Progressives or with a line in them?

I think I scared the OP off...........

 

sounds like your overdrive shift solenoid is bad. You can replace that in your driveway by droping your tranny pan, remove the filter and its right there. There are three of them and you can get all three or just the one that is bad. I would do all three at the same time.

Why not help the guy rather than tell them to start a new thread and whine about gramer.

 

Because it truly is a PITA to read those posts. It's not grammer that's the problem. It's one paragraph run-on sentences that are not clear.

You absolutely sure you understand him?