1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

BURNT UP PINION BEARING

Discussion in '40- & 55-Series Tech' started by billy, Aug 5, 2003.

  1. billy

    billy

    Messages:
    25
    Likes Received:
    0
    Joined:
    Aug 5, 2003
    Location:
    Abingdon Va.
    I RECENTLY COMPLETED A SPRING OVER ON MY 76 40 AFTER DRIVING IT ABOUT A HUNDRED MILES IN 2 WHEEL DRIVE, NO PROBLEMS, I THEN DROVE IT ABOUT 4 MILES IN 4 WHEEL DRIVE, THEN DISASTER STRUCK. THE FRONT PINION BEARING LOCKED UP. I DID THE CUT AND TURN 15 DEGREES OF PINION ANGLE, MOVED THE FILL PLUG UP 2 INCHES, MINI TRUCK KNUCKLES, AND A HIGH STEER. I TRANSFERRED THE REAR GEAR TO THE FRONT. WHAT IN THE WORLD DID I DO WRONG? ??? IS THIS GOING TO HAPPEN AGAIN? DO YOU HAVE ANY SUGESTIONS? THANKS
     
  2. 3_puppies

    3_puppies SILVER Star

    Messages:
    8,326
    Likes Received:
    220
    Joined:
    Dec 2, 2002
    Location:
    Helena MT
    Did you fill it with oil? ???
     
  3. billy

    billy

    Messages:
    25
    Likes Received:
    0
    Joined:
    Aug 5, 2003
    Location:
    Abingdon Va.
    Yes 90 W to the 2 in high fill plug. 90 W still looks and smells good. ;)
     
  4. bad_religion_au

    bad_religion_au

    Messages:
    2,212
    Likes Received:
    0
    Joined:
    Apr 24, 2003
    could the oil maybe not get into the pinion because it's pointing up? i got no idea really, cause i'm sua and a noob... but sometimes the stupid questions lead to better answers
     
  5. woody

    woody Internet Fireman Staff Member

    Messages:
    10,336
    Media:
    303
    Likes Received:
    1,099
    Joined:
    Jan 15, 2002
    Location:
    Toquerville UT
    I've run my front pinion pointed straight at the t-case for 5 years with the SOA and never raised the fill plug...no problems, just overfill a few pumps on the 90-wt. However, I rarely/never run at any speeds with the front axle locked in or in 4WD.

    IMO, coincidence....bet that bearing was due to die regardless.
     
  6. hammerhead

    hammerhead

    Messages:
    1,995
    Likes Received:
    0
    Joined:
    Jul 5, 2003
    Location:
    Central, Utah
    I agree with Woody. It sounds like coincidence. If I understood you correctly you put your rear diff in the front, therefore you put the most worn, most used, most likely to fail diff in the more difficult end of the vehicle to repair. As a rule you should keep your best in the front axle because in case of failure the rear can be removed in minutes where as the front takes a few hours.