GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER

Rear and Front Dif.

Discussion in 'GM Powertrain' started by 89steveo50, Jan 17, 2012.

  1. 89steveo50

    89steveo50 New Member

    Joined:
    Nov 4, 2010
    Messages:
    63
    Likes Received:
    0
    Alright, so i experienced this for the first time a week ago. I was going up a ramp ( that kind that goes in circles) and i started hearing this horrible clunkcing noise in my dif. my left tire was skidding. So i stopped and put in 4 wheel. It did the same thing. when i finally got on a straight away, it stopped.

    Does this mean i got a bad dif. ( i'm going to school for mechanics so i understand how it works) i've never really experienced this before. I've heard th g80 is a good dif, but would it be beneificial to swap out my stock dif.
    #1
  2. aloxdaddy99

    aloxdaddy99 New Member

    Joined:
    Dec 4, 2010
    Messages:
    1,720
    Likes Received:
    2
    I would check to make sure the fluid level is correct. Than I would pull the diff cover to check the gears.
    #2
  3. Boonduff

    Boonduff New Member

    Joined:
    Sep 5, 2011
    Messages:
    355
    Likes Received:
    1
    The G80 is by no means a good diff. It has many small, fragile parts inside, and has been known to fail with even normal street driving. It can behave like you are describing when it does.
    #3
  4. 89steveo50

    89steveo50 New Member

    Joined:
    Nov 4, 2010
    Messages:
    63
    Likes Received:
    0
    I changed out the fluids last year and I did top it off. This only happens when one tire is on slippery and one isn't and then when it does get traction i still get clunking noise, and then goes away. Is there any better diff i could install that would allow power through it and is more sturdier.
    #4
  5. donl

    donl New Member

    Joined:
    Apr 24, 2009
    Messages:
    130
    Likes Received:
    0
    When was the last time you changed the rear differential fluid?
    #5
  6. 89steveo50

    89steveo50 New Member

    Joined:
    Nov 4, 2010
    Messages:
    63
    Likes Received:
    0
    Almost a year ago. I might change it again this spring, and take a look at the dif. but, i kinda want a new diff though. ones that are indestructable and actually work.
    #6
  7. Boonduff

    Boonduff New Member

    Joined:
    Sep 5, 2011
    Messages:
    355
    Likes Received:
    1
    If you want a limited slip a real good one is the Detroit Trutrac. Its uses gears instead of clutches so it'll last the life of the truck. If you're looking at a locker avoid the automatic ones such as the Detroit Locker. They can cause handling porblems on slick roads. I'd recommend a selectable one such as the Eaton Elocker or the Auburn ECTED. The Elocker functions as a open diff when off and locks when activated. The ECTED is a limited slip when off and locks when activated.
    #7
  8. aloxdaddy99

    aloxdaddy99 New Member

    Joined:
    Dec 4, 2010
    Messages:
    1,720
    Likes Received:
    2
    I wish OX made lockers for these axles.
    #8
  9. 89steveo50

    89steveo50 New Member

    Joined:
    Nov 4, 2010
    Messages:
    63
    Likes Received:
    0
    Thank boonduff for the options. I'm also looking for one that works great with the snow.

    I alos noticed my front dif acts funny in 4 wheel drive. My turning radias is cut in like 1/3.. If i go to far, it'll lock up untill i go into 2x4, then it unlocks and good to go..
    #9
  10. Boonduff

    Boonduff New Member

    Joined:
    Sep 5, 2011
    Messages:
    355
    Likes Received:
    1
    Are you running it in 4wd on dry pavement? It'll cause binding like you described, unless your truck has the Auto-Trac transfer case, then you can drive it on any surface when in Auto mode. The other positions, 4hi and 4low should only be used on loose or slick surfaces like dirt, gravel, snow, and ice. The binding on surfaces that don't allow slip can result in broken u-joints and a damaged transfer case.
    #10
  11. 89steveo50

    89steveo50 New Member

    Joined:
    Nov 4, 2010
    Messages:
    63
    Likes Received:
    0
    There are times when i do use 4wd on dry pavement, such as trying to pull the boat out of the boat ramp and turning. But as for today, there was a good layer of snow on the ground and i kept getting close to the locking but it didn't lock, just you could tell something was going on. Since i'm kinda in setting of getting a new rear dif, would it be wise to get a new front dif as well, something more reliable and durable?
    #11

Share This Page