1991 GMC Jimmy 4 wheel

1991 GMC JIMMY
144,000 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
LONGBEACHCHIK
  • MEMBER
  • 1 POST
when i put it in 4 wheel it doesnt engage, could the hubs be dirty and need to be greased?
Jan 17, 2010 at 7:39 PM
Advertisement
Avatar
BILLYMAC
  • CERTIFIED EXPERT
  • 2,204 POSTS
Hi
longbeachchic.
No the hubs are probably fine. there is a electric motor on your transfer case that moves when you push that button and another on the front axle. one of these is full of dirt or water. you can disassemble them and clean. or replace them and your 4 wheel drive will work.


ty billymac
Jan 17, 2010 at 7:50 PM
Avatar
JIMMY_JAMES
  • MEMBER
  • 4 POSTS
The 1991 may have still had the vacuum switch on the transfer case. It is like a 13/16 nut with a few vacuum lines plugged into it.
Jan 19, 2010 at 2:30 PM
Advertisement