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No power to rear end

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by awheeler, Aug 6, 2012.

  1. Gryphon

    Gryphon Rockstar 100 Posts

    Welcome to the Brotherhood of the Busted Axleshaft!

    Sounds like either a snapped shaft or stripped splines. Either can and does happen fairly frequently on well-used trucks. The 10-bolt is a semi-floater, so the shaft may or may nor come out. I'd pull the passenger side shaft and see what ya got in there. If it's just stripped splines, stick it back in, drop the rear shaft and lock the front hubs for a while. If the shaft is broke, it can wander out on it's own and leave you doing the tricycle thing going down the road. That sucks...done it twice over the years.

    I'm not sure if your 10 bolt is a C clip or not...they made them both ways depending on the year. If it is, it's likely stripped splines...which is the most likely.
  2. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    This is a stupid question that doesn't really help you fix your rear but what kind of gas mileage are you getting with it in 4 wheel drive(I guess for you front wheel drive) all the time?
  3. Gryphon

    Gryphon Rockstar 100 Posts

    Can't speak for anyone else, but I had to do it for a few weeks once. Didn't notice a difference.
  4. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    Really thats surprising you would think that it would decrease you fuel mileage trying to move that much mass with a less efficient drive system that's only meant to work part time.
  5. Gryphon

    Gryphon Rockstar 100 Posts

    Its a driveshaft going to a live axle. The only appreciable difference is the gear or chain transfer system in the t'case and the steering joints. Otherwise, aside from minute differences in weight transfer, the system is the same. The amount of extra drag from the t'case is not a consideration as most of this linkage is turning anyways, even in 2wd. By dropping the rear shaft, you save a teeny bit of weight although you do keep the rear axleshafts and diff turning. however, in a V8 truck application, this amount of rotating mass combined with the drag of components should be negligible. You may see the loss of a mile or two per gallon...but on an application that gets between 10 to 15 mpg anyways, it's really not a consideration. Either way, it is a limp-home scenario, not a redesign for daily use. If that was the case, I would advocate a swap to a full-float rear axle with locking hubs. But again, the suspension and such is not designed to operate in that manner...a limp-home, gotta-make-it-work scenario.

    You do pose a question worth consideration, which is why I went into such detail. Hope it helps! :)
  6. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    Point well made thanks for actually taking the time to explain your self and full answer my question.
  7. Gryphon

    Gryphon Rockstar 100 Posts

    Thanks for taking it right! :great:

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