I have a '95 Jeep YJ and I too cannot shift into 4wd. I vacuum tested the shift motor and it seems to hold the vacuum. I changed the gear oil in it today and cleaned the shift motor, still nothing. Then i read about the vaccuum switch on the transfer case being the possible culprit and I immediately pulled the switch. The check valve ball moves, but it is very stiff and slow to return. Does anybody know how this swith is supposed the react? Also, it does seem that my Jeep stopped going into 4wd when it got cold outside, but there has not been warm enough weather yet to test that theory here. Thanks for the help.
- posted
19 years ago