New front Differential Actuator and still not engaging the front wheels?

Asked by Dec 16, 2015 at 07:30 PM about the 2005 Chevrolet Silverado 1500 Z71 Ext Cab 4WD

Question type: Maintenance & Repair

Even though the light on the dash says it is 4 high or 4 lo, the front end is
engaging. I just spin the back tires on snow. I read that I should replace the
front axle actuator, so I did that and still nothing. I pulled the actuator out and
turned 4x4 on and off and it moved in and out. Put it back on the truck and
nothing. What other places should I be looking at to help engage the front
end? I have jacked up the front end while in 4x4 and the tires spin freely?

6 Answers

16,915

Jack up the front end and put it in 4xr. Check to see if the front shaft spins freely or not. If it spins free then the transfer case is your problem.

1 out of 1 people think this is helpful.

Just jacked up the front end in 4x4 and the driveshaft doesn't turn. The wheels spin freely like the front differential is not engaged. Like I said, I replaced the front axle actuator, pulled it off again and it goes in and out, put it back on and still no locking of the diff? Kind of stumped, might take it to a mechanic.

16,915

The collar that locks it might be damaged inside the front diff. Not an easy fix if so

1 out of 1 people think this is helpful.

Thanks for your help. I will update with what the mechanic gets back to me with.

Did you get an answer? I am experiencing the same issue

I took it to the mechanic amd he had to replace everything in the front differential. Found t9ns of metal shavings when I pulled the filler plug. Cost about $1000 and had to wait 2 weeks to get parts from GM. Sucks, I am guessing the guy I bought from either ran it dry or left it in auto amd drove around on pacement for months.

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