4x4 isues 4high is good but 4 lo is no go

[wishiwerefishn]

i have a 94 explorer and its wicked but lately its been a real sh*t first the temp gage went wonky but i fixed it, then the trany cooler hoses blew and i fixed them, then the uper rad hose blew and i fixed it ,then the transfer case shift motor but i fixed it. NOW the 4x4 is being a b*tch . the 4 high works well but when i try to shift to 4 lo the 4x4 shuts off im stumped anyone see this before and if so what the hell do i fix now??:roll:

 

[pugsy]

Maybe you didn't fix the shift motor correctly and get everything lined back up. Or, there's a sensor for the 4 lo that detects when the tranny is in neutral...if that sensor went kaput, then it won't engage into 4 lo even when the tranny is in neutral (as the computer won't know so if the sensor is gone bad)

 

[little x]

Are you sure the 4x4 turns off? or does the 4-hi stay on, it just doesn't shift to low?

 

[DeRocha]

How long have you had the '94 and when was the last time 4Low worked? When did you change the T-case fluid last? If the 4x4 computer cannot shift into 4x4 Low after ~5 secs it will assume a problem and reverse itself (shifting back to 4x2).. The problem could be related to either a weak shift motor, or the T-case selector shaft being VERY hard to turn.

I would chock the wheels, remove the shift motor, put the transmission in "N" and then use pliers to manual shift the T-case into 4H-4L and back to 2H.. Each position has a slight indent that you can feel as you reach it. Doing this a few times may free up the T-Case so that the shift motor is able to now move it.

 

[WickedWindsor]

You have to be in neutral to be able to go into 4x4 lo.