Transmission problem I was driving the truck back and forth to work just fine, ended up in the hospital for 4 days and try to go to the store and theres no reverse. put in drive and it goes fine. once the truck warmed up the truck acted like it was in neutral. it cools down and it drives forward again until it warms back up. I'm trying to change the fluid and filter but can't get the pan off. do i really have to take the exaust off to do the pan off? and also any suggjestions on how to fix the original problem, a sensor? or switch? its a push button 4 wheel drive.

SOURCE: when you push the 4

a lot of 4wd you have to back up for a few feet to disengage the hubs after you tourn them back to 2wd

SOURCE: 1991 chevy silverado lost reverse

just have someone look at it. like aamco or someone that does a free diagnostic. the tranny will probably have to be rebuilt.

SOURCE: Can't engage 4X4 wheel drive or disengaging

Replace evry vacuum line that has any thing to do with the 4 wheel drive. Worked 4 me

SOURCE: my truck is stuck in 4 lo

pull atc 25 amp fuse in underhood fuse center and 10 amp 4wd fuse inside cars fuse box,your problem is in control box behind kick panel on pass. side ,corrosion build up,

SOURCE: My 98 s10 is stuck in 4 wheel drive low.

Pull the kick panel on the passenger side. there is a small box mounted there that is the computer that controls the actuator for the 4wd system. this is notorious for problems due in fact that the connector likes to pull out and away from the module. I had the same problem and the solution is simple.. take a long zip tie and get it between a few of the wires and around the module. tie it in and have a nice day.. it wont come off or try to pop out anymore and you should have no issues getting into 2wd, 4wd h, 4wd L.