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Rear Gear Gurus help needed please?

Discussion in 'The Hokey Ass Message Board' started by Russco, Jul 24, 2011.

  1. Russco
    Joined: Nov 27, 2005
    Posts: 4,194

    Russco
    Member
    from Central IL

    9" ford chunk, I had to change the spool from 33 spline to 31spline spool. So I just installed new spool and carrrier bearings I didnt disturb the pinion. This was an already used gear set. I marked it and put it back with the same teeth meshing. So how does this pattern look?(this is with .008 back lash) I cant get it to leave much of a defined pattern on the coast side. I should have checked the pattern before I took it apart to see what it was like but I didnt. I did check back lash previously and it was at .014 and seemed a bit too much. This is a 5.67 gear but will likely not see much if any track time going in a B/FX clone Falcon.
    The firs pic is drive side Thanks in advance.
     

    Attached Files:

  2. Stock Racer
    Joined: Feb 28, 2010
    Posts: 702

    Stock Racer
    ALLIANCE MEMBER

    Drive side low (toward the toe) which is good because the teeth do deflect some. Hard to see the coast side but it looks decent. Should be just fine. The drive pattern I see will handle the power. It's hard to get a good pattern on used gears.
     
  3. r7bis
    Joined: Mar 12, 2011
    Posts: 36

    r7bis
    Member

  4. Run a piece of paper through it ,see where it squeezes,,,
     

  5. Bad Banana
    Joined: Jun 20, 2008
    Posts: 833

    Bad Banana
    ALLIANCE MEMBER

    If you didn't move the pinion and only move the backlash a little, it should not have changed much. You have to load it hard to get a good pattern. Put and axle in it and have someone try to fight you while you turn the pinion with a socket and long bar and the pattern will be easier to see. If it was OK before it should still be fine. I would probably run it.

    p.s. you need not mark the teeth and try to mesh them back. One has and even number and one has an odd or thy are both odd (depends on the numbers) so that they purposely don't mesh with the same teeth all the time. Helps them to wear even. All teeth from the pinion eventually mesh with all teeth from the ring gear eventually.
     
  6. Russco
    Joined: Nov 27, 2005
    Posts: 4,194

    Russco
    Member
    from Central IL

    Thanks for the quick replies. I've only done a few of these in the past and with new gears they left a nice defined pattern unlike this used set.


    An old timer once told me he set them up with a piece of paper. If it cut it it was tight if it kinked it it was good
     
  7. if it kinked it it was good[/QUOTE]

    boy, been there!:D
     
  8. Russco
    Joined: Nov 27, 2005
    Posts: 4,194

    Russco
    Member
    from Central IL

    boy, been there!:D[/QUOTE]


    I should have known :D
     
  9. dont leave the damn door open mike! :p
     

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