Xj1990

Hey, I've been having where it takes longer to shift gears. If I gun it it'll take a good second or two to shift into higher gear. Not good for racing. Maybe a solenoid that's going bad? It's 1990 xj 4.0 automatic.

Bustedback

You're not in a race car, you're in an XJ.

SnakeEyes814

lol, try adjusting your kickdown cable lightning mcqueen

Sent from my DROIDX using Cherokee Forum

J0E13

What he said. Granted you might have a problem. Don't get me wrong. But Jeeps are Jeeps. They're not smoothing shifting ferraris.

excess650

Are you in "comfort mode" or "power mode"?

Adjust the kickdown cable, make sure you're in power mode,amd if you still think it isn't right, check your thottle position sensor. This is assuming that you have verified the proper fluid level, and correct type of fluid, AND that it isn't in need of changing.

Xj1990

I dont do seriouse racing lol. But when a stang rolls up next to me I like to challenge them. The fluid levels are correct and correct type. I have it in comfort. I assumed power was for towing or off road.

93gc40

Power mode is for when you need power more and sooner. IE RACING. The only time you should even try to race a Stang is when that race occurs on a dirt road. Any other road the Stang whens and you get embarrassed for trying something so ridiculous. If you even won the Stang wasn't racing.

tjwalker

Excellent advice. The throttle position sensor is DIRECTLY involved with transmission shifting characteristics. Here is more..
---------------------------------
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 automatic transmission TPS which is reasonably priced.

Bustedback

Challenging Mustangs in an XJ is a punk move, don't be a douche nozzle.

chadh92

Trying to race anything in an XJ is what gets owners stereotypically bad reps. It's a jeep, take it for what it is.

Xj1990

They still get up and go quickly tho. There not slow cars. Thanks for the adice I'll give it a try and see how it goes.

Quezzy

Whispers:

shhh gotta talk silently here not to wake up the tranny troll. how many miles do you have on the tranny filter.......

Xj1990

Just replaced it a couple months ago. So maybe two or three thousand.

dukie564

Sig Worthy

xj wheeler

Cherokees aren't just for crawlin' anymore!