Can or should these threads on a pinion be repaired?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Feb 23, 2024.

  1. mile marker 27

    mile marker 27 Road Train Member

    1,166
    1,536
    Dec 4, 2019
    0
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. special-k

    special-k Road Train Member

    1,513
    3,230
    Dec 27, 2008
    Southern Ontario Canada
    0
    I would attempt a repair but make sure have a quality die and the skills to use it.
     
  4. buddyd157

    buddyd157 Road Train Member

    13,452
    34,341
    May 25, 2017
    under a shade tree
    0
    yes, either a file type or die thread chaser.

    best to take it to either a machine shop, or a truck repair garage.

    of course, take the nut along as well for an inspection and thread chasing as well.
     
  5. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    7,214
    14,207
    Jan 20, 2010
    Hesperia, Ca.
    0
    If it was mine, I would replace it and have a peace of mind. But that’s me NOW that I’ve learned through out my years of experience. In the old days, I would have just chase it down with a thread chaser and put a ton of lock tight on it.

    Edit; forgot to mentioned, that nut kept getting loose on the pinion but that’s cuz I kept using the old nut with plenty of lock tight. Again, that was before I knew better.:rolleyes:
     
  6. JB7

    JB7 Medium Load Member

    520
    622
    Dec 13, 2022
    0
    Ring and pinion are matched sets. It is not just replacing the pinion. So as buddyd157 suggests I would take it to a machine shop. And buy a new nut.
     
  7. Rideandrepair

    Rideandrepair Road Train Member

    16,514
    53,919
    Aug 8, 2015
    0
    May or may not apply, but my 13 spd trans. calls for an upgrade 750ft lbs torque instead of 500. Was sold a new nut that was supposedly different than original. Looks the same to me. Never did swap it out.
     
    mile marker 27 Thanks this.
  8. broke down plumber

    broke down plumber Medium Load Member

    312
    612
    Jan 25, 2024
    0
    Those threads look knarly , plenty of hairline cracks in there too . I would bet .
     
    mile marker 27 and Rideandrepair Thank this.
  9. Rideandrepair

    Rideandrepair Road Train Member

    16,514
    53,919
    Aug 8, 2015
    0
    I’m still waiting on instructions from the other thread, on best way to remove it. Lol. I considered doing mine once because of a leaking seal and end play. Sounded complicated for me. Decided to leave it alone. Glad you got it off. Seemed like a hard job.
     
  10. AModelCat

    AModelCat Road Train Member

    27,674
    144,905
    Jul 7, 2015
    Canuckistan
    0
    Hard to tell with pictures. If it was just a couple flattened threads I'd just clean them up and send it. If threads were peeling or it looked like damage penetrated into the shaft I'd rebuild the diff.
     
  11. Goodysnap

    Goodysnap Road Train Member

    3,497
    8,368
    Jul 12, 2017
    0
    They say crossed threads are better that no threads at all. I don’t think there’s enough left there to save.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.