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Thread: Differential vent tube/hose leaking.

  1. #1
    Join Date
    Jul 2002
    Location
    Boston, MA
    Posts
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    Differential vent tube/hose leaking.

    I got around to checking where the oil stains were coming from, I had a assumed it was from the side seals since they were not changed during my recent rebuild. Instead the drips where from the lower control arm area, which is where the hose gets tucked into the subframe, anyways, the nipple was not in completely but it seems to still be venting and spitting oil out of the other end of the hose. Questions is does this indicate an overfill or did I use a bad gear oil manufacturer that is allowing it to foam up? or did I simply run the diff too hard and its making the oil too thin or a combination of different factors. Anyone having this problem?
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

  2. #2
    Join Date
    Dec 2007
    Location
    Pacific Rim
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    6,695
    I saw a similar 'leak' issue when I changed/refilled my Anny's diff...decided to try again, suspecting it was over filled, so... I made sure the car was level LR/FR, then left the fill plug out over nite so it could take it's time draining. No issues after doing it that way.

    What oil did you use?

  3. #3
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    Boston, MA
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    Chasing MPG I went 90
    Name:  05C35FAB-7497-4BFF-AAEF-96511F8C4E49.jpeg
Views: 49
Size:  50.4 KB
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

  4. #4
    Join Date
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    Location
    Pacific Rim
    Posts
    6,695
    Should be ok for MA, I think, not sure about MX, tho. And your lat model doesn't need friction mod back there, so...

  5. #5
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    Quote Originally Posted by KMT View Post
    Should be ok for MA, I think, not sure about MX, tho. And your lat model doesn't need friction mod back there, so...
    I do need friction mod as I have lsd. The automatics had open diffs. But I give the diff a serious workout the way I drive I wonder if I heat up and make it too allowing it to do what it did. Or maybe itís overfilled and it will eventually stop.
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

  6. #6
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    Location
    Pacific Rim
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    6,695
    Serious workout plus overfilled always makes me want to puke, too.

    Hope it's not under, now...

  7. #7
    Join Date
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    Location
    Boston, MA
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    Does anyone know the orientation of the plastic fitting? It seems itís angle cut inside to shield somthing. On the base of the outside there is a groove, which way does this go?
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

  8. #8
    Join Date
    Feb 2012
    Location
    Mobile, AL
    Posts
    158
    I have that installed with the notch facing the rear. The part number is E9SZ-4022-A if you wanted to get a new one.

    Name:  20140807_205959.jpg
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  9. #9
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    If the stock vent is giving you trouble, perhaps this would help:
    https://www.cjponyparts.com/ford-rea...2014/p/HW3281/

    Looks like the original was designed more for water crossings

    Make sure yours isn't plugged or misrouted.

  10. #10
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    Quote Originally Posted by jco1385 View Post
    I have that installed with the notch facing the rear. The part number is E9SZ-4022-A if you wanted to get a new one.

    Name:  20140807_205959.jpg
Views: 35
Size:  390.5 KB
    Thank for the pic.
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

  11. #11
    Join Date
    Jul 2002
    Location
    Boston, MA
    Posts
    7,428
    Quote Originally Posted by KMT View Post
    If the stock vent is giving you trouble, perhaps this would help:
    https://www.cjponyparts.com/ford-rea...2014/p/HW3281/

    Looks like the original was designed more for water crossings

    Make sure yours isn't plugged or misrouted.
    This leaked on my mustang axle it was replaced under warranty. Same concept I guess.
    1994 Supercoupe 5spd Custom, first to buy a 2.1L Big Bore Kenne Bell Twin Screw for an SC - 480whp at TI/SCU
    On the 1.7l AR SC: 415WHP and 12.2535 @112.18. Best TQ to date 516ft/lbs.
    1990 35th 5spd 2011 Carlisle 1st place class winner. 12.9@108MPH 1.9.
    2013 GT/CS 5.0L FRPP 2.3l Whipplecharged family weekend car.
    2011 Cadillac Escalade Hybrid LS 6.0l LZ1

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