Replace the thermal actuator in the front differential.
check the brake pedal switch
Engage the clutch. Shift to neutral. In neutral move the smaller shift lever. On an 87 wrangler the lever is closest to driver. The shift pattern is 2H at the top, 4H middle and 4L is all the way down.
To shift the recon into reverse push the red button at the right break lever labeled "R" down and pull the lever back. Then shift down using the down arrow on the electric shift. Reverse light should come on and back you go.
If the shift lever on the floor won't move to engage there is most likely a linkage problem. If the linkage seems to move and you shift the lever under the dash from 2wd to 4wd and the transfer case does not engage look for a vacuum problem. the lines can be very brittle and break easily. There is a vacuum motor on the transfer case that must work in order to engage the 4wd. if all of these seem to work then the problem is likely to be internal.
700r4 gear shift lever want lock in place
OD means Overdrive. The light is on because you have disengaged the Overdrive. The button is on the shift lever on the side. Push that button to engage the overdrive.
All vehicles with automatic transmissions have a safety switch to prevent starting when the shift lever is not in the "Park" position. If you vehicle requires extra pressure or attention to engage the switch, it is because the shift mechanism is loose and/or misaligned.
need more info.. is it a manual 4WD that you have to pull the lever on the transmission hump to engage the 4wd or is it push button 4WD?
bark lever
The shift level is locked by the shift solenoid. When you step on the brake, the brake switch sends power to the shift solenoid and it moves a lever to unlock the shifter. If either the switch or solenoid is bad, you can't shift out of park.
OD= Overdrive. There will be a switch to engage/disengage the OD located on the shifter, or on the console in close proximity to the shift lever. It should even have a marking on it.
It's the overdrive engage button, which is like a 5th gear. It only engages when the gear lever is in 4th gear and it can be operated without depressing the clutch.