front differential won't lock in?

1995 GMC SIERRA
140,000 MILES
Avatar
LBP484
  • MEMBER
  • 2 POSTS
i changed out the actuator and it still doesn't lock in. the front drive shaft spins when its in 4x4 but nothin happens. the oil doesn't have any metal in it and i didn't hear any noises before it quit working.
Nov 20, 2011 at 8:49 PM
Advertisement
Avatar
RIVERMIKERAT
  • ✓ASE Certified Mechanic
  • 6,110 POSTS
  • ASE Certified Mechanic
If there is a vacuum control to the transfer case, make sure it is receiving vacuum. If it's electronically controlled, make sure the controller has power and is passing the proper signal.
Nov 20, 2011 at 9:06 PM
Avatar
LBP484
  • MEMBER
  • 2 POSTS
its electric. i checked the voltage to the actuator and its gettin power. i tried to pushing the shift fork by hand and it only moves like 1/4 of an inch.
Nov 20, 2011 at 10:27 PM
Avatar
RIVERMIKERAT
  • ✓ASE Certified Mechanic
  • 6,110 POSTS
  • ASE Certified Mechanic
I need to know if it's a Dana axle and what size.
Nov 20, 2011 at 10:51 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.