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rear D44 axle vent location

Discussion in 'Early CJ5 and CJ6 Tech' started by peter, Jun 15, 2011.

  1. peter

    peter Member

    I have the factory D44 rear end and for the life of me I cannot find any vent hole. Where should this vent be? Does it no have one? Does it need one as it has been like it is for a long time without issue. 1967 cj5. The front has a D30(from 78 cj5) and the vent is right on top and easy to send a line up high.

    Thank you,

    Peter
     
    peter, Jun 15, 2011
    #1
  2. '74Renegade

    '74Renegade Active Member

    Not sure about the offset rear ends, but the intermediate centered rears have the vent on the axle tube to the passenger side next to the brake line "t".
     
    '74Renegade, Jun 15, 2011
    #2
  3. 1960willyscj5

    1960willyscj5 Well-Known Member

    I just went and looked at mine. Can't find one on it either.
     
    1960willyscj5, Jun 15, 2011
    #3
  4. Patrick

    Patrick Super Moderator Staff Member

    It's on the driver side axle tube, about half way across, on the back.
     
    Patrick, Jun 15, 2011
    #4
  5. Warloch

    Warloch Did you say Flattie??? Staff Member

    I had to wire wheel my axle to find it - covered with paint...
     
    Warloch, Jun 15, 2011
    #5
  6. Patrick

    Patrick Super Moderator Staff Member

    Yeah, I should have mentioned that it's nothing more than a small hole in the tube
     
    Patrick, Jun 15, 2011
    #6
  7. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Damn I get a lotta mileage out of this pic-


    [​IMG]

    H.
     
    Howard Eisenhauer, Jun 15, 2011
    #7
  8. Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    my 71 had 1/8 npt vent in that spot changed it out to a 1/8 npt hose barb and ran tubing to top of rear fender well and reinstalled vent - high and dry . did this with front end ,trans , transfercase
     
    Twin2, Jun 15, 2011
    #8
  9. Don X

    Don X The Prodigal Moderator Staff Member 2023 Sponsor

    My '53 M38A1 has what I believe to be the original to it Dana (actually Spicer) 44. The vent is located on the rearside of the carrier on the removable cover.
     
    Don X, Jun 15, 2011
    #9
  10. peter

    peter Member

    Do most jeepers here think it is important to have this hard to find vent working or even moved to a higher location? I have not found it yet so i dont know if it is there. It obviously has worked as is for over 4o years. I have a power lok in the rear with synthetic oil in it. When I replaced the oil end of last year it was very dirty and I a put a new seal on the dif cover. The front was much cleaner but it has a top mounted vent that I ran up by the radiator. Seemed like a better set up.

    Peter
     
    peter, Jun 19, 2011
    #10
  11. Patrick

    Patrick Super Moderator Staff Member

    I drilled an tapped mine and ran the hose up high inside the RR fender well and put a filter on the end.
    [​IMG]
     
    Patrick, Jun 19, 2011
    #11
  12. nickmil

    nickmil In mothballs.

    You need a working vent or as things heat up, pressure will build up and cause oil leaks. I'd do like Patrick did and make sure the small vent holes are plugged off. Did like Patrick did but put the vent in the cover. I added a sheet metal shield over the vent so gear oil wouldnt work it's way up and out the vent. Drilling and tapping the housing would be easier. Just watch placement so the ring gear doesn't splash oil out the vent.
     
    nickmil, Jun 19, 2011
    #12
  13. Patrick

    Patrick Super Moderator Staff Member

    I had drilled the housing itself and had the vent there, but it did just this. It would push oil all the way up the tube and saturated the filter and started dripping ..
     
    Patrick, Jun 19, 2011
    #13
  14. peter

    peter Member

    Thank you for the input. I like the idea of relocating up high in the fender well to keep water out. Great ideas as usual and thank you again.

    Peter
     
    peter, Jun 19, 2011
    #14
  15. 1960willyscj5

    1960willyscj5 Well-Known Member

    Funny, I always thought the vents were these little spring-loaded top-hat like thingies on top of the tube or the gear housing it's self.
     
    1960willyscj5, Jun 19, 2011
    #15
  16. nickmil

    nickmil In mothballs.

    Typically the flanged axle rears are like that but the tapered axle housings have the holes like shown
     
    nickmil, Jun 19, 2011
    #16