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Thread: 9 inch rear end puking out vent

  1. #1
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    Default 9 inch rear end puking out vent

    My son and I went on the first big drive in the T-bird on Friday night. We went with the local Pensacola Cars and Coffee group. We went around trip of about 80 miles, some interstate driving and back two lane roads. Saturday morning I went out to check things out, looking for leaks etc...

    I noticed some oil on the ground below the gas tank. I check the brake lines, looked good, then I touch it and smelled it. Gear oil from the vent on the 9 inch rear end. Any suggestion why this would happen? My vent tube is only 1/2 inch long, I have noticed before on trucks that the vent has a long hose on it. Going to drain gear oil and change to see if any moisture was in the housing.

  2. #2
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    The vent tube is likely just a nipple that approx 2.5ft hose should connect on to... The hose generally attached to chassis with the open end inside a opening in crossmember, frame rail, etc... Any lube pushed into hose will drain back into axle...

    If lube isn't milky I doubt there is a moisture issue...






    My other rides (that actually do run & drive)

    1969 Fairlane Cobra 428CJ 4-Speed << New 49th Birthday Picture

    1972 Comet GT - 306 C4

  3. #3
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    Perhaps the differential was slightly overfull?
    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

  4. #4
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    Quote Originally Posted by thunderjet302 View Post
    Perhaps the differential was slightly overfull?
    X2 There is no reason for the 9" to puke unless ....A - overfilled
    B- cheap oil (NOT non -foaming)
    84 COUGAR/88HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
    71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

    Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!

  5. #5
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    thanks for info, will let yall know something soon

  6. #6
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    i let out some fluid out, made longer vent tube, so far so good

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