Front differential won't lock in?

Tiny
LBP484
  • MEMBER
  • 1995 GMC SIERRA
  • 140,000 MILES
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.
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Sunday, November 20th, 2011 AT 8:49 PM

3 Replies

Tiny
RIVERMIKERAT
  • MEMBER
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.
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Sunday, November 20th, 2011 AT 9:06 PM
Tiny
LBP484
  • MEMBER
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.
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Sunday, November 20th, 2011 AT 10:27 PM
Tiny
RIVERMIKERAT
  • MEMBER
I need to know if it's a Dana axle and what size.
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Sunday, November 20th, 2011 AT 10:51 PM

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