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.
the shift interlock cable,sounds like the problem
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
unhook positive batery cable for 5 mins
To adjust the throttle body cable on a 1998 Jeep Grand Cherokee, first, ensure the engine is off and the vehicle is in park. Locate the throttle cable at the throttle body, and check the tension by pressing the throttle pedal fully. If adjustment is needed, loosen the cable's retaining nut and adjust the cable length until there is a slight amount of slack, then retighten the nut. Finally, ensure the throttle moves freely without binding before starting the engine.
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.