Quote:
Originally Posted by jdmccright
I'm kicking myself for not investigating this while I had the diff open and drained, but wanted to throw it out there.
My truck has the G80 locking diff with 3.73 gears. When I first changed the diff oil, I confirmed it is a G80 by seeing the cam gear on the side of the outer pinion cage. So, I thought cool.
One day I had to pull over to let a emergency vehicle go by. It was a 2-lane road with no shoulder and had been raining. So I had one tire on the pavement and the other in the mud. I thought, no problem and slowly added gas to what I thought would be enough to make it engage. However, the rear didn't lock up and I sat there spinning my right rear tire while cars waited behind me. The left one didn't do squat.
So, the other day I had finished changing the rear axle bearings and belatedly thought I'd do the test. Blocked the front wheels, put it in neutral, jacked up the rear and spun one tire hard by hand. The opposite tire did not lock and spin in the same direction. Instead it spun slowly in the opposite direction. The driveshaft spun too but can't remember which direction.
I wish I had thought of doing this with the cover still off so I could check the cam and weights. My question is what is wrong? Any thoughts or help would be great. Thanks!
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did you check the vehicle codes ...your sure you have a locking diff...? the reason I ask this is because you do not have to open the diff to see if it is the locking diff...10yrs ago I found out just by giving it some extra throttle on wet pavement and you can feel very easily the lock locking....
if you bought this used it is possible it had the locking diff ,,,but because of problems with it , it was removed ....some have done this rather than replace the diff..