Guascone

Hi,

I have some trouble on my JKUR 2015 automatic gearbox W5A580

When the gearbox is cold, mabe after a night parking, after I switch on the engine, the gearbox works properly ( just few minutes).

But after few meters when I have to stop,ie at a traffic light, when I decrease the speed from 20/30 Mh until the stop, it seems that the gearbox doesn't disengage the traction...if you compare it with a manual gearbox it seem like a sticky clutch.

But after few kilometers, when the gearbox oil becomes hot, everything comes back to normal.

Anyone had some issue like this?

I have been to the dealer but they has just upgraded the gearbox software...


Thanks a lot for your help!

scubatech

Both mine & my wife's work as they should. Sounds like the lock up in the converter isn't releasing soon enough. A software adjustment should fix it. These are pretty good transmissions.

Guascone

Thanks for the quick feedback!
According to you it could related with the cold temperature?
With higher temperature everething work properly...

TweakJK

Mine has always done this. Feels like the jeep just wants to take off at idle when it is cold out until the transmission fluid warms up.


with 5.38's, It REALLY wants to take off.

scubatech

I think it's a function of RPM mostly. There's probably a Scan Tool re flash for it.

Guascone

The dealer has has already re flash it...they told me also the the scan show that all the parameter are ok...I don't know if it could be normal...

Guascone

Can I make some test or check?
Have you some suggestion? The JKU is covered by warranty one more year but I would like to avoid big damages

ronjenx

Check the engine idle rpm when it's cold and doing what you describe, in gear and in neutral. Compare to idle rpm after warm up, in gear and in neutral.

Guascone

I have forgot...I have a JKUR 2.8 CRD. The RPM at idle are always the same.
In any case I'll monitor them!

Thanks!