GU6 3:42 Rear Axle is it a posi ????

Discussion in 'Engine & Performance' started by RMS25thta, May 15, 2009.

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  1. RMS25thta

    RMS25thta GMFS Member

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    Hey guys my 02 Tahoe has a GU6 3:42 rear axle with the tow package. Just wondering if that would be a factory posi unit. Please let me know if you can.

    Rich
     
  2. Evan

    Evan GMFS Senior Member

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    Is there a G80 code in the glove box? If yes, you have a limited slip differential. If no G80, then no, you don't have an LSD.
     
  3. 08RCSB

    08RCSB I don't have a truck

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    Yeah, GU6 only denotes the ratio. G80 will tell you if its a locker.
     
  4. low4x4

    low4x4 Untouchable

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    just jack up the rear wheeels, turn the right side so it would be going forward....if the other side is going in the same direction..its a posi....if its going in the oppisite direction it not
     
  5. JakeBrakeIH

    JakeBrakeIH GMFS Member

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    or just do what the other guys said...open the glove box and right next to the GU6 it will say G80 if it has the factory locker, if not...you have an open diff my friend
     
  6. 1989K1500

    1989K1500 GMFS Senior Member

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    Look in the glove box, right next to the gu6 will be g80 if it has a factory locker.

    That wont work. He doesnt have a factory spool, so....
     
  7. 08RCSB

    08RCSB I don't have a truck

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    I have G80 and mine dont do that.
     
  8. spitfire2332

    spitfire2332 professional grade

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  9. MeanGreenZ71

    MeanGreenZ71 is Bi-Winning and a

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    They forgot to add the *BOOM* at the end where the G80 blows though. :read:
     
  10. RMS25thta

    RMS25thta GMFS Member

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    no G80 code in the glovebox. I would have thought that would be standard with the tow package, guess I was wrong.
     
  11. Bryant

    Bryant GMFS Member

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    same here
     

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