Originally Posted by mshahwan

You guys aren't crazy. Its a programming glitch. I have a 2015 Sahara 4dr with 8k.

when you climb steep hills transmissions holds the gear all the way up (4000rpm+). also shifts between 1-2 , 2-3 holds the gears for too long, followed by a significant rpm drop before shifting. acceleration while vehicle is moving, transmission hunts for proper gear, most times it will perform double shift.

no amount of driver relearn is going to fix this. but a module flash will.

all in all these are fantastic transmissions considering its predecessor. Very reliable with 25 years design cycle, tough as nails,

that is until you take it to the Chrysler dealership for fluid change, then its garbage

Originally Posted by bo9roadking

The only complaint that I have with my 2012 auto is when I start accelerating slowly from a stop as if I'm trying to be conservative with the gas consumption. The transmission shifts too soon and causes the engine to hesitate until it gets more rpms. The transmission acts like it should downshift to get the rpms back up, but it doesn't. It holds second gear until the rpms are high enough for the shift to 3rd, but the torque isn't really enough to keep the jeep moving forward without hesitation. If I start off with a little more gas pedal, there isn't an issue because the transmission waits to shift until the rpms are higher.

Originally Posted by Blown-JK

Ever since I went to 37's regeared (4:88) and calibrated my auto it likes to hold gears too long. Especially 3rd and 4th under light to normal acceleration. I recently installed a Magneson supercharger and it's off the charts bad now. It will literally hold 4th gear at 5000 rpm's at about a 1/4 throttle until I let my foot completely off the gas. Then it finally shifts into 5th. It was never been this bad before. I assume part of the problem is the disconnecting of the battery and resetting the "learning" portion of the PCM. I first thought it was all related to the "tune" for the blower but because the problem was there before (just not as bad) I am leaning towards the continuous learning that I have read these vehicles do. I am super frustrated with that because we tool around slowly near the dunes where we wheel at or we are running WOT in the sand. It must confuse the hell out of the computer. I am always going from one extreme to another with it.

I would be okay with using the manual mode but that thing is absolutely worthless too. I was surprised to see that some people actually like it. The only thing it does is hold whatever gear you are in (that is of course until you hit redline and it up shifts for you anyway). If you try to up shift early under heavy or full throttle; say around 5000 rpm's it will hold the gear until it redlines anyway then up shifts. If you want to hold 2nd for example at, let's say 3300 rpm's then floor it, it will downshift to 1st on its own then return to 2nd where you had it in the first place. So I am still trying to figure exactly what the hell manual mode is even there for besides accidentally bumping the ridiculous left to right slap shifter and putting it in the wrong gear. Sorry for ranting I am just frustrated with the newer vehicles thinking and driving for me and not being able to turn all this crap off like the stability control, traction control, TPMS sensors, etc. The tuner that came with the Magneson does let me shut off some of these things but first I have to click my heals together 3 times, turn key on, wait, off then wait, spin in a circle twice, wait some more, then my instrument panel lights up like a Xmas tree until I turn my Jeep off and then the process starts all over again.

Yes after all my bitching I do have a question. does anybody know of a tuner that would "unlock" the manual mode on the transmission? Unfortunately there is not any transmission settings within the Diablo Trinity tuner that I have. It is probably an absolute pipe dream since it is becoming painfully apparent to me that I will need to acquire an M.I.T. degree to actually drive my Jeep. I am all for automatic transmissions but I am seriously regretting not buying a manual. I had no idea the programming / mapping had gotten so out of hand.