Im back !!! with an odd question...

Discussion in 'Chevy Truck Forum' started by Pallet Pete, Jan 7, 2017.

  1. Pallet Pete

    Pallet Pete Full Member

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    First DANG I like the new site!!!!!!!!!!!!! WOW Ive been gone a while... Hello guys.


    Second that odd question.

    I have a 2001 silverado 4.8 2wd GU6 3:42 that is followed by G80 on the sticker however it does not act like it has a locker. Am I missing something? when you hit the gas it slides one way and the left passanger side spins but not the right when its snowy and so on....
     
  2. Kennyray

    Kennyray Moderator
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    That would depend on how fast the tires are spinning. The G80 will not lock at speeds over 20 mph.
     
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  3. Pallet Pete

    Pallet Pete Full Member

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    The spinning is when starting out from a stop. That is where its noticeable with the snow anyways or if your in the mud it will just dig in on the passanger side.
     
  4. leolkfrm

    leolkfrm Full Member

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    usually if only 1 side spins its not posi....both sides spin make it slide, trying to bite in

    might need additive in it too?
     
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  5. Kennyray

    Kennyray Moderator
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    The G80 doesn't take the additive, it it's added that would explain why it's not working.
     
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  6. leolkfrm

    leolkfrm Full Member

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    LOCKING DIFFERENTIAL LUBRICANT (SERVICE INFORMATION) #91-4-109
    SUBJECT: LOCKING DIFFERENTIAL (G80) LUBRICANT - (SERVICE INFORMATION)
    VEHICLES AFFECTED: ALL LIGHT TRUCKS EQUIPPED WITH G80 REAR AXLE ALL YEARS
    Some light duty trucks equipped with locking rear axles (G80) may exhibit rear axle chatter, especially when turning a corner from a stop.
    This condition of alternate engagement and disengagement of clutches in differential assembly is usually caused by contaminated axle lubricant.
    To correct this condition, drain and refill the rear axle with SAE 80W-90 GL5 (P/N 10950849). The use of any additive in locking rear axles (G80) is not recommended. Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. All light duty trucks equipped with RPO G80 make use of a locking differential and the use of additives will delay the engagement of the locking mechanism and may decrease axle life.
    VEHICLES/COMPONENTS INVOLVED: ----------------------------- Some light duty trucks equipped with locking rear axles, RPO G80.
     
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  7. kbrown11

    kbrown11 Full Member

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    I have heard the G80 is not that great of a LSD as well. Maybe its just not working too. I would try a fluid change with straight 80w-90 oil. I bought a transfer pump from harbor freight, seen a similar transfer pump at walmart for about the same price. I removed the fill plug, pumped out the old and pumped in the new.
     
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  8. Pallet Pete

    Pallet Pete Full Member

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    I will go ahead and flush it again. Hopefully the rear starts to work again.:btruck:
     
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  9. leolkfrm

    leolkfrm Full Member

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    get a gasket and pull the cover off, take a look inside for any obvious problems, pieces that a suction hose wont tell you about
     
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