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Thread: Drive train question

  1. #1
    Join Date
    Feb 2003
    Location
    RAYMOND WA.
    Posts
    95

    Default Drive train question

    On my 2003 2500 duramax, in front of the rear end between the universal joint is a large round metal piece, around 8 to 10 inches in diameter, what is this for and what does it do?
    ORDERED 1-15-03 ARRIVED 2-10-03= 03/2500HD/D/A/EXT.CAB LT/ LONG BOX/4X4/CARBON METALLIC/ONSTAR/ TTT CAMPER MIRRORS/WESTIN BOARDS WITH LITES/HUSKY FLOOR LINERS/PRO FIT FLAPS/ACCESS TONNO/LINEX BED RAILS/ FUMOTO OIL DRAIN VALVE,
    BEDRUG/BILSTEIN SHOCKS/ ISSPRO EGT GAUGE/RED LINE LUBE, BANKS EXHAUST BRAKE. GALAXY 929 CB/ WILSON 1000.KENNEDY LIFT PUMP.

  2. #2
    Join Date
    Apr 2001
    Location
    CA
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    13,181

    Default

    Vibration/harmonic damper. It helps prevent damaging (and possibly annoying) vibration and harmonic frequencies generated by the axle from transmitting through the shaft.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Feb 2003
    Location
    RAYMOND WA.
    Posts
    95

    Default

    Thank you.
    ORDERED 1-15-03 ARRIVED 2-10-03= 03/2500HD/D/A/EXT.CAB LT/ LONG BOX/4X4/CARBON METALLIC/ONSTAR/ TTT CAMPER MIRRORS/WESTIN BOARDS WITH LITES/HUSKY FLOOR LINERS/PRO FIT FLAPS/ACCESS TONNO/LINEX BED RAILS/ FUMOTO OIL DRAIN VALVE,
    BEDRUG/BILSTEIN SHOCKS/ ISSPRO EGT GAUGE/RED LINE LUBE, BANKS EXHAUST BRAKE. GALAXY 929 CB/ WILSON 1000.KENNEDY LIFT PUMP.

  4. #4
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,003

    Question

    Road salt and de-icer can affect these dampers by eating away at the cast iron/steel components. Not sure what to do about that, or how extensive a repair it might be to fix it. Anyone replace one of these?

  5. #5
    Join Date
    Apr 2001
    Location
    CA
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    13,181

    Default

    Quote Originally Posted by More Power View Post
    Road salt and de-icer can affect these dampers by eating away at the cast iron/steel components. Not sure what to do about that, or how extensive a repair it might be to fix it. Anyone replace one of these?
    The damper is part of the pinion yoke (not separable), and a repair would simply be a replacement of the yoke. If the damper fails due to corrosion, the shaft and other nearby components (axle, springs, etc.) should also be suspect. The damper appears, to me, to be the least of the worries in that area. Something serious would likely fail long before it became a factor.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

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