Ex Euro Driver
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Me 3. Just changed my oil yesterday and truck did not roll backwards when jacked up from the front.
Be careful jacking up your AWD
- Thread starter LanceD
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my old nbs only did that once, that was after the transmission had broke and the tow truck driver had pulled it up on a flatbed type truck, put it in park, let off the brake and it just rolled right back off the truck, I thought it was rather bizarre tow truck driver said sometimes there is a mechanism inside that breaks and that's what happens.
HACK BLOCK
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if its in park it shouldnt roll, the parking pawl should stop it. if that was the case then u would need to use the E brake everytime u park
As it was rolling backwards, the front tires were turning forward which tells me that the transfer case is indeed just like an open differential.
For you folks that don't have rolling problems, how steep is the incline?
For you folks that don't have rolling problems, how steep is the incline?
well I just went out and tested mine by jacking it up in the front with my truck backed into the driveway (so the front is facing downhill) and sure enough it rolled, so maybe there isn't anything wrong with yours after all. kind of ******* weird considering if I jack up the front on a level surface the front wheels spin free
HACK BLOCK
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just to make sure i understand, your yukon was parked like the pickup in your sig, u jacked the front and it rolled forward? did it roll a little or a lot like u think it wouldnt have stopped?
Matt_
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Remember there have been a few different AWD tcases over the years. Starting in 2007 (iirc) they changed from viscous coupling to planetary gear type. The planetary gear tcases act just like an open differential, think of the front and rear driveshaft like the driver and passenger axles coming out of the rear diff; they will spin in opposite directions even with the trans in Park.
My 2008 Sierra Denali had the planetary gear tcases and would also roll if I jacked the front or rear up on a steep surface.
I think there may have been another update around the 2011ish timeframe but don't quote me on that.
I would NOT trust the ebrake to prevent the vehicle from rolling. Make sure you properly chock the tires.
My 2008 Sierra Denali had the planetary gear tcases and would also roll if I jacked the front or rear up on a steep surface.
I think there may have been another update around the 2011ish timeframe but don't quote me on that.
I would NOT trust the ebrake to prevent the vehicle from rolling. Make sure you properly chock the tires.
Correct^^^^^. My 02 has the viscous coupling and it won't roll with the front off the ground. I block the tires regardless and so should anybody else though, that's common sense.
