[01grand]

Normally with this code there is something wrong with the solenoid block. But before changing anything, have a look at the connector on the left hand side of the tranny. The connector could be losse or have dirty connector pins. Clean it out with some contact cleaner,let it dry, reconnect and try again. When the fault returns, then its probably the solenoid block itself.

Thanks for the tip Frank! I will check that out as soon as the winter crap dries up a bit around here, we are finally getting a decent amount of snow.

 

[01grand]

Ok, so while driving to work this morning the code came back. When I got to work I cleared it and before leaving to lunch I used my superchips to return the vehicle to stock. No codes since. I am starting to wonder if maybe the solenoid is on its way out and the tuning (plus maybe the way I drive with it on) is causing the problem. Seem possible? I know its only been one day I plan on running a while without the tune and see what happens.

 

[01grand]

I believe the tuning bumps up the line pressure and changes shift points, and I know it makes harder, quicker shifts.

Also, I keep getting P0456 lately, which is a very small vacuum leak. I tightened my gas cap again, but I'm starting to think its something else. Guess I will have to start checking vacuum lines.

 

[01grand]

Update: No codes have come back all week. I cleared the codes Monday morning and took the tuning off then. No codes, so on Wednesday I decided to try the mileage tune to see if that makes a difference for the 3 hour trip I have this weekend. No codes since then, and hopefully none over the weekend, I will report back on Monday.

This leaves me wondering, do I have a weak solenoid that fails under the added pressure of the performance tuning? If all goes well this weekend I will try the tuning again next week, I think that would confirm the problem if it comes back.

I did not get a chance to check the wire connector like you suggested Frank, but I'm thinking now that if the connector were loose it wouldn't make a difference if the tuning was on or not.

 

[01grand]

I don´t know what the tuning exactly does Aaron, but indeed you would expect the same problem with or without the tuning if it was related to the connector.
Or if the solenoid would draw more current due to switching a higher line pressure, it could still have to do with a resistance problem in the connector.
If the problem comes back, that would be the first thing i would check, and it would only cost some time and contact cleaner.

I plan on checking that connector as soon as I can get under her. She drove fantastic for 4 hours out to my sister in laws this weekend with a car full of people and stuff, but then kicked the code returning to her house from a short trip into town.(with mileage tune on, which didn't seem to make much difference) I cleared it, (and went back to stock tune) and she drove great again all the way home, dropped off my other sister in law and niece, and the code came back on the way from there home (just a few miles). Seems to happen always when shifting a lot in around town driving, but is fine on steady highway driving. A connector issue would definitely make sense if it is getting a bad signal when shifting. I will check it out ASAP. Thanks for the help!

 

[01grand]

:thatfunny::thatfunny::thatfunny::thatfunny:

Ok Dave, I promise if I have to go in and replace the solenoid pack I will get the transgo, if for any reason to avoid the whole lying in a ditch problem. :lol:

In other news, I went under the Jeep today and found the harness. It seemed ok but I pulled it off, sprayed it with some electronics cleaner and upon inspection it appeared ok. I sealed it back up and it seems ok. I went ahead and put the 87 octane tune back on, since that didn't seem to make a difference. While I was at it..... wait for it........

I pulled the TCM plug and snipped the torque management wire! :woot:

I love the way it WOT downshifts now when passing, etc.

Overall everything seems fine now, time will tell if the code comes back. If it doesn't I may have to pull the valve body and put in the transgo anyway.

 

[01grand]

:thumbsup:

 

[01grand]

Well, another week has gone by and still no more problems. I will be going on a 7 hour drive to Michigan next week, so I'm hoping no more problems. If I do I will be getting the shift solenoid and transgo, if its still fine I might do the transgo anyway! Which kit is it that you used Dave, I have seen 2 models. One they call a shift kit, the other a programming kit. I see it says the reprogramming kit comes with a resistor that doesn't work with aftermarket programmers (I have a superchips) and it says to get the shift kit if using a programmer.