Possible Looming Transmission Issues??

[andyb]

Get it serviced and drop the 100 bucks to make sure its got fresh parts and fluid.

Yeah it's going in at 9 tomorrow morning. I've talked with the guy who runs the shop before about tranny service and he said they do a full service drop the pan and change filters. I've had some good interaction with this guy and shop, but unfortunately only found out about them immediately after the tranny fluid was flushed before. Pretty sure he knows my Jeep well. It's been there 3-4 times in the last 10k miles. Classic Jeep product for you, helping you make relationships with shop owners/operators.


EDIT: It hasn't thrown any lights, but I'll have to plug in the superchips to see what codes are in there. I know my service 4wd codes are back already.

[andyb]

I checked the fluid after work and it was low. I added a quart of fluid and a pint of seafoam trans tune since it's still going in tomorrow morning for new filters and fluid. That's the safe play with over 1500 miles of towing coming up in the next month.

Surely I've lost some lifespan with however long it's been low on fluid

[06JeepXKHEMI]

Check your trans cooling lines and see if you're leaking, we all have been and are plagued by those lines. Other than that you shouldnt be down any fluid unless the right amount wasnt put in last change.

[andyb]

I'll check the lines after work. I did notice during my oil change 2 weeks ago that there seemed to be more than usual amounts of fluids/grease/crap on the bottom of the transmission pan.

Guy at the shop seems to think from my description that it's a solenoid problem and needs to go to a tranny shop. He said the service could just be waste of money. I elected to do the service anyways because I don't have the time to leave it with a tranny shop before I start the move. Better off to have new filters and fluid than to do nothing. Tomorrow I'll be making the first trip hauling a trailer down to Augusta.

I'm also going to replace the TPS. Some people over on Jeep Forum seemed to suggest that it could cause symptoms similar to that.

[Matt]

I think theres a calibration sequence you can do for the TPS. I wouldn't go throwing parts at it, especially for a system like ours that'll throw a DTC if throttle position doesn't match pedal position.

[andyb]

I think theres a calibration sequence you can do for the TPS. I wouldn't go throwing parts at it, especially for a system like ours that'll throw a DTC if throttle position doesn't match pedal position.

Yeah, really not trying to take the throw parts at it overall approach. But for a cheap $35 part I think it's worth a shot to throw this one at it.

[Matt]

I hear ya. Might as well disconnect the battery and leave the key on for 5+ minutes too.... reset the modules etc.

[07JeepXK]

I think theres a calibration sequence you can do for the TPS. I wouldn't go throwing parts at it, especially for a system like ours that'll throw a DTC if throttle position doesn't match pedal position.

Matt. I was having a crazy idling issue last march and was told to replace the Throttle Position Sensor. I replaced the TPS and haven't had any issues since. I got the part for cheap and only took a few minutes to replace it. I didn't get any codes or anything from the bad TPS so I think it's worth a try for him to replace it since it's very inexpensive. It wouldn't hurt to eliminate the TPS as being the problem. I have the same year and engine XK as he does

[Matt]

Idling issues without a DTC are a lot more likely than torque converter locking issues without a DTC caused by the TPS since the PCM is constantly monitoring pedal position vs throttle position while driving (so a hunting TPS without pedal movement would/should throw a code)

I was just saying it might be worth trying a calibration first since that might cause the issue without a DTC and not cost any money.

But yeah, for $35 kill two birds with one stone.... disconnect the battery and install a new sensor; Itll be a new part and automatically calibrate.