[thejdman04]

ON my 07 2500hd duramax, when I am in the driveway, (that I usally rarely plow(though right now only about 3 inches thick), WHen i am backing up or pulling out, one tire starts to spin and then the whole truck shakes violently and sort of hops (still a one wheel wonder when doing this) Took it to the stealer, they said ITs because when the fluids cold, its so thick, "the dogs just slip they cant lock up". He said there is nothing they can do abou ***, the rear will pry lock up when the fluids warm. By the time I get to work/or the store when the fluids warm theres no snow or ice so Ive never tested it when warm. when I came home from the dealer, the sun had melted the snow enough, I either cant get it to slip, or hes right about it locking up when warm. So have you guys encountered this??? IS he right or blowing smoke? If we get more snow, and I need to get out of my driveway, I can flick it into 4x4 and not count on the posi, but woudl be nice if itd lock up like tis supposed to (usaully thats enough).

 

[thejdman04]

Note: the dealer did notice the same problem but like i said he said its normal and gm posi's suck, he said put in a electric or air if you want a real one. I would think these would work a bit better if nothigns wrong w/mine.