My 525 i 1992 is only stuck on 3 it revers ok park ok 3 ok but 4 ,5 and 2 only works as 3 what is going on here

First explain why it won't go into neutral. This may be the problem for no start.

lot of time 4X4 will engage only in neutral and disengage in neutral. some times switching from drive to neutral and revers will help to disengage. just sake back and for till you feel the 4X4 is off.
Good luck

You will have to tow the car out to a auto transmission specialist as the gears have seized in the gear box. You will cause more damage if you over ride the engine controls. The torque converter must be stuck.

sounds like you need a new transmission.but i would try and have it flushed first.

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You will need the transmission replaced or revbuilt.

that means your transmission is about to go. u sill can drive just dont get into tight spots park for 2 cars when u go places

You may have a bad revers solenoid. Check the fuse and look for any of the fuse to be bad like the transmission fuse. Best thing to do is get the blazer scanned at Auto Zone free of charge for any DTC codes that may be affecting your transmission's performance. Try this, place the ignition to the run position and pull the ECM(BATT) fuse out for 30 seconds and then place it back in. Start the Blazer, it may stall but let it. Just start it again the ECM is just relearning the engine and transmission, let it idle for 1 min and then go for a test drive. This should reset everything in the truck's ECM like the day it was first started and any DTC code will be new and active. Do not add any additives like lucas transmission fluid repair, that will just make it worst. Any additive that may the transmission thicker will make the fluid retention more making the shift solenoid stick causing shift conflicts. Good luck and keep me posted. No revers is ether a bad solenoid, bad PCM signal, or broken sun gear. 

THERE IS A SENSOR ON THE BRAKE PEDAL THAT RELEASES THE THE SHIFTER.THERE A 3 COMPONENTS INVOLVED.U CAN PUT IT IN NEUTRAL BEFORE U START THE CAR.THEN WIL SHIFT.

there is a plastic rod under the t handle shifter
with five little balls, if you pull the handle up, you should see the white plastic rod pull it out and if there are only 4 balls on the rod then it is broken, you can use a piece of wood (like a chopstick) that will fit, cut to length and you should now be able to **** in to park and 1st

put it in revers and back up 20 or 30 feet then put the car in n then try to take 4 wheel drive off