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Thread: Pinion Bearing Saver or you got to know the angles

  1. #1
    Senior Member SavageSun4x4's Avatar
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    Default Pinion Bearing Saver or you got to know the angles

    There is always an angle:
    Many folks run flat transfer case skids and as a result the pinion angle can get a bit high. About the max on rear pinion angle is around <17 or so degrees. I was running about 16 degrees on my D44 and rear pinion oiling was a concern. Here is a trick I used to save the critical bearing from oil starvation on my Jeeps D 44 axle:


    Stop by your local Ace Hw store and pick up a inch "street elbow. You can get brass or iron but I use brass. Remove the oil fill plug and screw in the elbow with some Teflon tape wrapped on the threads. Hand tighten, then add one more turn and insure the elbow is pointing up.


    On a level surface, fill your differential to the top of the elbow with your favorite brand of axle oil. Then take the oil fill plug you removed, add a wrap or two of Teflon tape and screw into the top of the elbow. Go wheeling and hit the highway and you are set to keep the pinion bearing running cool and healthy.


    If you rig is not a DD and is a trail rig then the up-down of the trails will be more than adequate to keep the pinion bearing oiled.


    I did not have any issues with the elbow hitting my OEM tank or track bar.
    Tools:
    1/2 drive to remove your oil fill plug
    8 in open end adjustable wrench to tighten the street elbow



    Time:
    About 10 min



    Cost:
    About $4 bucksp1010028-2.jpgp1010026-2.jpgp1010029-2.jpgp7070011-2.jpg
    Don

    '15 Jeep Unlimited Rubicon Hard Rock...OLD SCHOOL 6 Spd Manual Trans
    17 Oaks Ranch Companies LLC

    www.savagesun4x4.com

  2. #2
    Administrator korisu56's Avatar
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    Default

    interesting idea. thanks for posting

  3. #3
    Still Growing Too! Big Green's Avatar
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    I don't believe you took that rig wheeling, way too clean under there.

    Nice tip though, thanks.

  4. #4
    Member JimhatTJ's Avatar
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    Nice

    I always filled mine up to the normal hole the park on a side hill and add another half quart or so
    03 Rubicon, 6.0L Chevy, 700R4, 241, ORI struts, custom F&R dual traiangulated longarms, 39.5 Irok, frame backhalf, 35 Spline Ford 60's, Full Hydro steering, 110"wb
    05 TJ (salvage), 6.0L aluminum head Chevy with LS1 parts (@400hp) , 4L60E, home made longarm on 14" SAW coilovers, 35 spline Dana 60's, 100"wb

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    Bobble Head Jeeper trailsnail's Avatar
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    Good idea, I park mine on a hill to to fill the diffs. That would work even sweeter with a half diff guard like the one warn makes to keep it from being pounded on rocks.
    Sven
    Colorado Springs Chapter Calendar and News

    '04 Wrangler Rubi, 5.5" Extreme Duty LA, 35" Goodyear Duratrac's, Warn RC 9.0 (Sold - My life sucks)

  6. #6
    Senior Member SavageSun4x4's Avatar
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    I later put the Warn you speak of on and it clears fine...
    Don

    '15 Jeep Unlimited Rubicon Hard Rock...OLD SCHOOL 6 Spd Manual Trans
    17 Oaks Ranch Companies LLC

    www.savagesun4x4.com

  7. #7
    Senior Member HillBillE's Avatar
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    Default

    Also, some aftermarket covers, like those from SOLID, not only offer rock protection, the fill hole is higher on the cover.

    BUT: This can be a bad thing, if your diff isn't rotated. My front diff for example, if I fill it to the bottom of the fill hole on the SOLID cover, it starts puking ger oil out the breather.

    Great tip Don! I know of at least one guy who burned up his pinion bearings becuase of lack of oil.


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


  8. #8
    Senior Member SavageSun4x4's Avatar
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    Yea, things are not so bad now with the trend to lower lifts. But when I put this on the rage was 6 in lifts and beyond. One so called Jeep TJ 'guru' and I won't mention any names ran a full 10 in lift and was pushing for 12. I know him quite well but some of the things he peddles are more 'fad' than anything else, but if you get the parts free then what do you expect.

    I never suffered any leakage out the ends of the axle tubes using this setup...
    Don

    '15 Jeep Unlimited Rubicon Hard Rock...OLD SCHOOL 6 Spd Manual Trans
    17 Oaks Ranch Companies LLC

    www.savagesun4x4.com

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