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hows my gear pattern???

Discussion in 'The Garage' started by big83chevy4x4, Jun 20, 2004.

  1. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    [​IMG]
    [​IMG]

    pics are fuzzy but you can see somewhat.

    to me the coast side is way off, but how can the drive side be close and the coast be way off? these are used gears, all i did was change the bearings on hte pinion and carrier, but somehow lost the pass side of the carrier shim. /forums/images/graemlins/dunno.gif
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

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    How much backlash are you at right now?
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

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  4. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Is it impossible to get clearer pics? From the looks of it, it is screaming pinion too shallow to me.
     
  5. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    ill go see what i can do, it might take a while, i can't upload to my comp and yahoo email takes too long

    i used the factory shims except for the pass side carrier.
     
  6. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    got some better pics, still not the best, this camera sucks donkey balls

    [​IMG]
    [​IMG]
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I would say the drive pattern is acceptable, but something needs to be done about that coast pattern to get it closer to the heel of the gear.

    Since I'm having such a hard time seeing it, take a look at the patterns here:
    http://www.ring-pinion.com/tech/yukoninst.pdf

    I can't see much of anything on that coast side, but if what I think I'm seeing is correct you're going to have to do some adjusting.
     
  8. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    you can see it on the inside 1/4 of the gear, the dark spots. how do i move the coast pattern without changing the drive too much? /forums/images/graemlins/1zhelp.gif
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    You can't. But there is more than one acceptable drive pattern.

    It looks like you're going to have to do some modification of the pinion depth to achieve the proper pattern. I keep wanting to say that you need to move the pinion closer to the ring gear. I could be wrong though.

    What is the minimum backlash allowed for that axle? It's possible you might be able to move the ring gear slightly closer to the pinion that way and get the pattern to move just enough to make it acceptable.

    Whatver you do, I wouldn't run it as it is now.
     
  10. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    how exactly do i measure backlash? i though it was what the carrier moved left to right, but after reading the link, it sounds like its the rotational movement from drive to coast or vise versa. if im wrong, and i think i am, it may solve all the problems /forums/images/graemlins/thinking.gif /forums/images/graemlins/thinking.gif
     
  11. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    im not sure on the minimume, iread a article on a camaro that had a 7.65 axle (same as this) and richmond recomends .008". i can't find anything for this axle, i only have the haynes manual, and it only tells me how to remove the axle /forums/images/graemlins/angryfire.gif /forums/images/graemlins/angryfire.gif no torque specs or any specs whatsoever. /forums/images/graemlins/angryfire.gif /forums/images/graemlins/angryfire.gif
     
  12. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Backlash is measured by the amount you can move the ring gear (rock it back and forth) between where the pinion hits the ring gear either direction.
     
  13. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    ok, ill go play with it some more and see what i can come up with.
    thanks abunch /forums/images/graemlins/waytogo.gif
     
  14. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Now you've got me just itchin' to put a set of 5.13s in my junk.
     
  15. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i think i got it figured out, i had .0005 backlash. i swap what side the shims were on (left on right and right on left) and the back lash is now .008 and the pattern looks alot better on both sides. ill get pics as soon as the batteries charge up. /forums/images/graemlins/waytogo.gif
     
  16. jjlaughner

    jjlaughner 3/4 ton status

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    [ QUOTE ]
    Now you've got me just itchin' to put a set of 5.13s in my junk.

    [/ QUOTE ]

    ME TOO! /forums/images/graemlins/whistling.gif
     
  17. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    heres what i have right now.
    [​IMG]
    [​IMG]
     
  18. fortcollinsram

    fortcollinsram 1/2 ton status

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    looks A LOT better to me...I would say you got it nailed down /forums/images/graemlins/waytogo.gif
     
  19. jjlaughner

    jjlaughner 3/4 ton status

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    /forums/images/graemlins/waytogo.gif whats the backlash on the rotation of the ring gear?
     
  20. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I'd run it as it is right now. /forums/images/graemlins/thumb.gif Good job!
     

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