Shift button can you fix the button in the shift handle so that it stops popping out? automatic transmission, not brake or linkage problem just waht ever keeps the push button from coming out of handle.

is it a linkage issue? if the shift lever is working and you can feel the detents, check your fluid make sure it is full and clean, if not you could have internal issues with the trans

Vehicles have a safety system that won't allow gear selector to be moved out of park unless brake pedal is pushed ! This what Buick calls there's
Automatic Transmission Shift Lock Control ! Depending on make of your vehicle it mite be called something else . But all vehicles have it.
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid

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The automatic transmission shift lock control switch

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The brake to shift relay

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The rear integration module (RIM)

With the ignition in the ON position, battery positive voltage is supplied to the brake to shift relay coil. When the RIM energizes the brake to shift relay, the brake to shift relay switch contacts close suppling battery voltage to the automatic transmission shift lock control switch. The circuit continues through the normally closed switch to the automatic transmission shift lock control solenoid. The permanently grounded solenoid is energized. This locks the shift linkage in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open. This causes the automatic transmission shift lock control solenoid to release. This allows the shift lever to move from the PARK position.

Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid

?€¢
The automatic transmission shift lock control switch

?€¢
The brake to shift relay

?€¢
The rear integration module (RIM)

With the ignition in the ON position, battery positive voltage is supplied to the brake to shift relay coil. When the RIM energizes the brake to shift relay, the brake to shift relay switch contacts close suppling battery voltage to the automatic transmission shift lock control switch. The circuit continues through the normally --closed switch to the automatic transmission shift lock control solenoid. The permanently grounded solenoid is energized. This locks the shift linkage in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open. This causes the automatic transmission shift lock control solenoid to release. This allows the shift lever to move from the PARK position.
Shift Lever Does Not Move with Brake Pedal Depressed ?

check shifting linkage.If you can not tell disconnect linkage an shift by hand.

Hi, if it is an automatic transmission, it could be several things:
It could be really low on transmission fluid or the fluid may have leaked out. Do you see an reddish or reddish-brown fluid under the car? Check the fluid level by looking at the transmission fluid dipstick.
The torque converter (essentially a motion transfer device that resembles two fans facing each other) may be bad. As the engine spins, up, the fluid in the torque converter starts spinning and flowing and starts to 'spin' the blade on the transmissin side (it's called locking up the torqure converter). If there a malfunction in the converter, or no fluid, as noted above, no motion to the transmission.
Is the emergency brake stuck on?
Another issue might be the transmission linkage - when you move the shift handle to "D", there is a linkage that moves a lever on the transmission to change how fluid moves thru the transmission, etc. Check for a broken linkage between the bottom of the shift handle and the tranny. This is best done at a good auto repair shop or dealer.
If this is a manual transmission car, you probably have a worn out clutch plate or broken shift linkage. See a mechanic.

Make sure you car is actually in PARK, Easy to do, Just disengage the parking brake (emergency brake) and attempt to push your car both forward and reverse to ensure your car isnt in neutral. If you cant budge the vehicle your good to go! If it rolls forward it may be in neutral or a forward gear. if it rolls backwards it may be in neutral or reverse. If it rolls both directions its in neutral. On that note if it moves at all skip to the third step (***) and make sure the transmissions shift bracket is in the park possition. Depending on your cars transmission model the parking gear is located all the way left to the farthest possition or all the way right to the farthest possition) One direction will put you in Park, the other in will put you in 1st gear, If your in 1st gear the linkage should be too far away from the shift plate to connect if your column says you are in park. DO NOT ATTEMPT TO START YOUR CAR WHILE IT IS IN A DRIVE GEAR AND THE LINKAGE IS DISCONNECTED IF YOU ARE ABLE TO START YOUR CAR IN ITS CURRENT STATE DO NOT MOVE THE TRANSMISSIONS SHIFT BRACKET UNTIL LATER IN THIS INSTRUCTIONAL!!!!!

* Floor shift automatic, the push pin lever (located inside your shifter/gear stick) may be malfunctioning. You have to pop the grip off and inspect the white plastic pin inside the shaft to see if it is damaged, also check inside the grip while you press the safety release (shift lock button) to ensure the internal slide mechanics are propperly working). Also check for anything obstructing the levers movement inside the floor housing.

** Column Shift. Make sure your pull pin lock is working properly (disengages the shift lock when you pull back the gear shift before you select a gear) if its broke theres two possible behaviors you'll experiance -1. You cant pull the gear shift back at all or -2. No effort or less than normal effot is required to pull back the gear shift. If all that checks out then you have to inspect the steering column linkage bar (you may have to remove some of the steering column housing to view it. Make sure the bar isn't bent or that its movement isnt obstructed.

***Automatic Transmission Linkage Check - Look under the kick panel located above the gas and brake pedals.........Once linkage is located under the dash (kick panel) disconnect it and try the gear shift. If the cable moves under the dash then reconnect it and move on to the next step.
Now block the wheels and climb under the car and disconnect the linkage from the transmission and have someone work the gear shift while you see if the cable is operating propperly, if the linkage moves (as it should) then try shifting the transmission back and fourth by hand while the linkage is disconnected., If the shift bracket feels stiff or is dirty clean it off with non corosive chemicals so you dont damage any seals. If the bracket operates smoother go ahead and reconnect the linkage and try shifting with the column again. Be sure to move the shift bracket back to the park position and make sure your shifter column is in park as well before you reconnect the linkage, if you dont you are sure to run into more issues.

Hope this helps you out! If all the mentioned area's above are in working order then your problem is with the car's transmission and you should take it to a speciallist.

1 Inspect Clutch Disc Contaminated Clutch or Pressure Plate Surface. 2 Inspect Clutch Disc Worn or Damaged Clutch Pressure Plate. 3 Inspect Clutch Disc Improperly Adjusted Clutch Cable or Linkage. 4 Inspect Transmission Shift Linkage (Manual) Loose or Worn Shifting Linkage. 5 Inspect Clutch Disc Broken, Missing or Weak Clutch Disc Springs. 6 Inspect Clu 1 Inspect Transmission Modulator(Automatic) Modulator Leaking Fluid into Vacuum System. 2 Inspect Transmission(Capacity) Fluid Level Incorrect. 3 Inspect Transmission Fluid Type Contaminated Transmission Fluid. 4 Inspect Transmission Filter (A/T) Clogged or Dirty Transmission Filter. 5 Inspect Automatic Transmission Internal Transmission Problems.tch Disc Broken, Missing or Worn Pressure Plate Diaphragm Fingers.

I only have 2003 Nav procedure. Maybe get used part at car-part.com. Page with * is lowest price.

SECTION 307-05: Automatic Transaxle/Transmission External Controls 2003 Expedition/Navigator Workshop Manual
REMOVAL AND INSTALLATION Selector Lever —Floor Shift Removal and Installation

1. Lift the floor shift PRNDL bezel.

1. Disconnect the PRNDL bezel wire harness connector.

1. Remove the shift lever handle and cover.
   1. Slide the handle bezel down.
   1. Remove the screw.
   1. Disconnect the TCS wire harness.
   1. Lift assembly from the shifter lever.

1. Position the window regulator control panel aside.

1. Remove the screws and the console finish panel.

1. Remove the left side console access panel.

1. Disconnect the transmission shift cable from the transmission selector arm.

1. Remove the transmission shift cable retaining clip from the floor shift mechanism through the console access.

1. Remove the four bolts retaining the floor shift mechanism to the floor.

1. Disconnect the floor shift mechanism wire harness connector.

1. Remove the floor shift mechanism from the console.

1. Remove the brake shift interlock actuator, parking brake release mechanism and harness.
   • Remove the wire harness retainers.
   • Remove the wire harness retainers.
   • Remove the two screws retaining the brake shift interlock assembly.
   • Remove the two screws retaining the parking brake controller.

it could be that the brake switch has malfunction and is not releasing the lock when your foot is on the brake
check there first as it a safety requirement to stop children moving the gears from park

Sometimes pens, coins, etc... fall down through the shifter seal and get lodged in the park lock cable not allowing it to release the shifter. When you step on the brake pedal the cable unlocks the shifter allowing it to move (safety thing). Remove the shifter console and inspect for foreign objects in the shift linkage. While inspecting with the key on (not running) keep stepping on the brake pedal to see the action of the cables under the shifter. Then remove object causing the cable not to function. If this turns out not to be the problem, then pop your hood and locate the top of the transmission. Find the shift linkage and see if the jamb is there. I sincerely hope that this suggestion helps you to locate the problem. Best wishes.