I think you are supposed to check it in neutral also. VERY critical that the engine is running.

 

My 2010 JK auto trans was doing the same thing. I took it to the dealer, and there was a trans update for the computer. All good now.

 

OK just checked it HOT and RUNNING and parked level. Fluid level is right between the HOT dots. I am prettyre sure it not a fluid level issue, if thats the case, why would it not be ok, shut off, restart, then be ok? The fluid level doesn't instaneously change with the on/off/on selection of the key.

 

Same here. The dealership has flashed the ECU on my 2010 twice - both related to the transmission; once for this exact problem (see below) and another for the "Hot Oil" chime.

Have you been in for the "Hot Oil" update? If not, I bet you'll be all set if you swing by the dealership and get the latest ECU updates.

https://www.jk-forum.com/forums/show...=1#post1511892

 

It happened to me once, I started off driving down the street with the doors and top off, I looked at the rpms and they were around 4000 and it wasn't shifting, then I realized I was in 2nd not drive! (stupid I know)

 

hey chuck that was my first thought. Even went to N, then back to D to be sure. I forgot to mention in my orginal post that "yes I was sure I was in D not 2" LOL so everyone has been me the benefit of the doubt on that one!

I have had no updates to the puter. I bought it in April I think. So I'll call to make appointment.

THX

 

Just made appointment for this saturday. One other question, should I use the flashpack to return to stock tune before taking it in???

 

100% YES. If not the dealer will label your account as modified, you will loose your warranty.

SLIM_SNOOPY

 

Well there will be NO DOUBT it will appear modified anyway after he sees it. Ray Charles can tell its modified! When I take it back to "stock" will that rewite tire size, gear ratio and TPMS sensor also?? Should I putl all that back as well?

FYI, WV laws states specifically that modifications cannot void all warranty on a vehicle. Only for the parts modified. Like if my windshield wiper motor burnt out, they cannot deny warranty based on the fact I have a lift kit.

 

Whether or not they would try to mess with your warranty, you'll definitely want to push the old factory programming back to your ECU before bringing your rig in. I'm not sure what happens (possibly nothing) when/if a dealership trys to overwrite modded software, but it's not a battle I'd want to fight and is easily avoided.

(Re)setting your gear ratio/tire size after returning to stock mode shouldn't be a problem since those are just attributes stored in the computer. The TPMS settings are manipulated separately by the Flashpaq and don't seem to automatically reset when going back to 'stock' anyway. I don't know whether or not the dealerhip's update would reset or simply ignore these modified settings.

When you bring your Jeep in, a service tech will upload the newest factory programming to your ECU. This will then become the new baseline for your Superchips programs... for this reason, you'll most likely need to update your Flashpaq online before using it to subsequently re-reprogram your ECU yourself. If you don't update online first, your programming attempts will probably abort with a "Vehicle not supported" message or something to that effect.