Transmission 2004 jeep will not shift up malfunctionlite is on

Sometimes the same part can be called more than one name. Mechanics have their own terms as do part manufatures.

have you tried starting in low and shift manually? aw4 transmission , is that all the time 4x4

yes

Jeeps have electric solenoids inside the transmission, (shift solenoids) I would have the jeep tested at the advance auto or autozone for codes if the check engine light is on; (its free) and go from there. sounds like the jeep may be in limp mode which chrysler created to protect the transmission. limp mode will not allow the jeep to shift all the way up to overdrive or shift all the way down to 1st shifting position. feels like it has to get going over25 to move well . AAMCO transmissions will diagnose your jeep for free in most states.

I’m happy to help further over the phone at https://www.6ya.com/expert/gregory_8e6ba270263743ac

if fluid isn't burned, shifts aren't slipping or flairing and you did not find a large amount of debris in the pan, chances are that the electronic shift control is malfunctioning. Have someone check it out.

get a filter and fluid change in the transmission.
that 5 speed automatic is tricky.

do a code scan and see if there is a vacuum leak telling it to shift too late

is the check engine light on?

It could be lash in the differential which is normal, but it could also be a loose u-joint in the driveshaft. Check the rear driveshaft u-joints.

start the vehicle, shift transmission to nuetral. then move the 4x4 shifter to the 2wd position. then shift the transmission into reverse and back up a few feet straight, then drive forwards. it should be out of 4x4.

maybe the speed sensor on the transmission monitors transmission speed and sends info to computer to control shifting not sure if this is helpful