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Pinion leaking

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 1979Jimmy, Jul 2, 2002.

  1. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Ok so after blazer fest I get back a notice that there s a signifigant amount of lube leaking from the pinion on my d44. how tough of a job is it to replace whatever seals there may be?
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Evan, are you sure your rig has a D44 and not a 10 bolt? In 79 GM used both diffs. If it is a D44 just remove the driveshaft and then the pinion yoke and replace the seal and tighten the pinion yoke back and reinstall the driveshaft. D44's do not have a crush sleeve like the 10 bolts. Nothing to worry about as far as pinion bearing adjustment.
     
  3. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Yeah i am sure that it is the d44. Thanks scott as always your a help. Too bad you missed blazer fest, we could have whooped it up on the pigs man.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    If the bolt is loose, it will leak, and tightening it up often just solves the leak, without replacing the seal. Then again, you are already that far,and you can get the seal out/in easily. Just don't forget to grease it well, or it will fail quickly.
     
  5. 1979Jimmy

    1979Jimmy 1/2 ton status

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    The truck had been sitting for a bit as i still have to put in the new starter. Well I decided to do everything yesterday and found out why the pinion was leaking. The breather tube was packed with mud. Causing the pressure to go out the pinion. It looks nasty i still have to pull the cover and do the pinion stuff so well see how filthy it is in the pumpkin.
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Thats kind of a better situation though : ) At least the pinion hasn't loosened up!
     
  7. 1979Jimmy

    1979Jimmy 1/2 ton status

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