You can do this by loosening up the gears. If you are having difficulties, you can take it into a mechanic.
adjust the shoes
you don`t know?
find the cable linked to your gas pedal it should have 1 or 2 nuts on it to adjust your idle
The 2005 Jeep Grand Cherokee emergency brake cable has adjustment nuts on each end of the cable. Turn the adjustment nut to lengthen or shorten the cable.
1st make sure that the service brakes are adjusted properly Adjustment should either be at the junction of the cables under the vehicle or at the handle itself (may have to remove trim for access) Set to 3 clicks and adjust so wheels are locked at this point
the shift interlock cable,sounds like the problem
unhook positive batery cable for 5 mins
Disconnect the positive battery cable and charge it with a slow charger. Clean and reconnect the cable once the battery is fully charged.
If external cable or mechanicalPut shifter into "Neutral" position and probably shorten throw to have transmission physically shift to Neutral - that should align all other positions If internal - bring to transmission shop
http://www.bionicdodge.com/Download/Dodge_Ram_Truck_Transmission_Adjustment.pdf I believe this is about the same for your jeep as it was for mine.
Disconnect and reconnect the ground cable from the battery or remove and replace the fuse that controls your computer.
To adjust the throttle cable, first open the hood of the car and locate the cable. Then, adjust the screws on either side of the cable. Following that, tighten the cable so that it is taut and there is no slack, but it is not over tight.