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Ring and Pinion Pattern

Discussion in 'The Garage' started by BDAMNRZ, Feb 10, 2007.

  1. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    What do yall think about this pattern. I have not set backlash yet. Just pinion depth. With this pattern I can tell that the backlash is a little tight. I no that these pics are a little hard to see. Just look realllllllll close!

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  2. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    I've done my R&Ps but am no expert. If the chief doesn't chime in, PM READYMIX and ask his opinion, he helped me out lots when I did mine.
     
  3. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    Thanks for the response Southernspeed. Anybody else?
     
  4. readymix

    readymix 3/4 ton status

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    Yeah the BL does appear to be a little too tight. But the pattern can be very misleading if you are trying to use that to verify the BL.

    The first thing you need to do is get a bettern pattern after setting the BL. There is not really any point in running a pattern if the BL is all out of wack....
    But besides all that your pinion might be a tad too deep. Remove .002 from the pinion shims and redo the pattern.
     
  5. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    Thanks for the input Readymix. I will post the pics withe th BL set tomorrow. Chief huh, I just got out USMC Sgt. Take it easy Chief.
     
  6. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    new pattern

    This is another pattern with .007" backlash. It looks like it might need abou .004" removed from the pinion depth. I don't know if that is even worth messing with. What do ya think?

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  7. roadnotca

    roadnotca 3/4 ton status

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    My recommendation is don't give up on the settings until it can't be improved any more; if you try to save time or settle for less, you'll kick yourself later, on a trail.:doah:
    IMO, the paste looks too thick to read. Was it you Readymix that recommended add a drop or two of diff oil to slightly thin the paste?
    An alternative came up on a later thread than when I did my diffs; mustard works.
     
  8. readymix

    readymix 3/4 ton status

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    Yeah teh pattern is too hard to read. But it does look like the oinion is still too deep.

    I always add a little gear oil to the marking compound to thin it out a little bit.
     
  9. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    Thanks guys, I will Try and get some better pics of this same pattern. I do think the pinion is a little too deep. Will keep ya posted.
     
  10. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    Gettting close

    Sorry it took so long guys. Had a death in the family and a lots of irons in the fire. This is another pic with .008 shim removed what do ya think about this one. Is preloading the pinion bearing (by feel) a bad idea? It just like setting peload on your wheel bearings, right. I have never used a torque wrench on setting bearing preload. Should I change my ways?

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  11. 1977k5

    1977k5 3/4 ton status Vendor

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    When doing initial setup, I just put some preload on the pinion bearings (i have done it enough that I know about how much it needs. When doing final assembly, I ALWAYS use an inch-pound torque wrench and would recommend that everyone else do the same. If you have it too tight, your diff will run very hot and you run the risk of boiling/burning the fluid and ruining everything. If you have the preload too loose your bearings will not last long.

    Your pattern might be ok. The drive side is more important to me than the coast. Post a picture of that.
     
  12. roadnotca

    roadnotca 3/4 ton status

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    Keep in mind the coast/drive is opposite for either end (fr/rr). The pic is showing the front.
     
  13. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    The picture IS showing the drive side. I might take a little more shim out of the pinion. Do you think that is needed or would you let it go the way it is?
     
  14. readymix

    readymix 3/4 ton status

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    It looks pretty good to me. Try to get a better picture of the pattern though.

    Thin out the marking compound with gear oil.
    Apply a little more resistance to the carrier while turning the pinoin.
    Macro setting on the camera.
    What is the BL set at?
     
  15. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    more pics

    The BL is a little loose at .012. Will tighten that up. Sorry, my camera sucks. El cheepo.

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  16. readymix

    readymix 3/4 ton status

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    Understand the camera issue. Mine is junk too.

    The pattern looks pretty good. Tighten up the BL and recheck the pattern.

    If anything is required on the pinion depth I would say remove .002" but then again the pattern is hard to read in the pics.
     
  17. 1977k5

    1977k5 3/4 ton status Vendor

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    Regardless of which side is driven, I always like to look at the pattern on both sides. If this is a low pinion front axle, then yes, the coast side of the ring and pinion is the driven side.

    Your pattern looks good to me (from the pictures you have posted) :waytogo:
     
  18. BDAMNRZ

    BDAMNRZ 1/2 ton status

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    :woot: :usaflag: :usaflag: Thanks for all the info and help guys. This is only the second R&P install for me. The carrier and pinion are on the bench right now so I will take a little more off the pinion depth. Then reset the BL and hopefully run one last pattern. Then it's on to the rear
     
  19. roadnotca

    roadnotca 3/4 ton status

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    Gotta close on that BL.:D
     

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