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  #1  
Old 01-20-2022, 01:20 PM
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mwood65 mwood65 is offline
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Front differential vent

Hey guys,


Just checked the differential fluid levels in my 74' Cherokee and when I removed the front plug vanilla milk shake poured out. I noticed the vent tube was missing and obviously got a lot of water in there.



It's a Dana 44 and the hole is in the top driver side of the diff housing and I am trying to figure out if it is a press in or a threaded hole. I raked a pick inside the hole and couldn't feel any threads so I think maybe a pressed in fitting??


If anyone knows what I need I would appreciate any advice.


Gotta get a new gasket, lube and whatever I need to install the vent line...


Gonna be fun to clean it out....or not.
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  #2  
Old 01-21-2022, 10:33 AM
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Location: Medford MA USA
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Quote:
Originally Posted by mwood65
Hey guys,


Just checked the differential fluid levels in my 74' Cherokee and when I removed the front plug vanilla milk shake poured out. I noticed the vent tube was missing and obviously got a lot of water in there.



It's a Dana 44 and the hole is in the top driver side of the diff housing and I am trying to figure out if it is a press in or a threaded hole. I raked a pick inside the hole and couldn't feel any threads so I think maybe a pressed in fitting??


If anyone knows what I need I would appreciate any advice.


Gotta get a new gasket, lube and whatever I need to install the vent line...


Gonna be fun to clean it out....or not.
As I recall, it's a pressed-in tube (and lame). They come loose easily. Anything you can figure out has to be better than the orginal.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
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  #3  
Old 01-21-2022, 11:59 AM
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Any I have seen are just pressed in tube.
easiest solution is tap the hole and screw in a barbed fitting.
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  #4  
Old 01-21-2022, 01:38 PM
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mwood65 mwood65 is offline
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Quote:
Originally Posted by babywag
Any I have seen are just pressed in tube.
easiest solution is tap the hole and screw in a barbed fitting.




Yeah, That's what I figured doing, Looks like about a 3/8" hole...


Thanks for the input!
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  #5  
Old 01-21-2022, 01:40 PM
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Quote:
Originally Posted by tgreese
As I recall, it's a pressed-in tube (and lame). They come loose easily. Anything you can figure out has to be better than the orginal.




Careful what ya say there fella! I can "figure out" some crazy stuff.


Just gonna tap the hole and use a screw in barbed fitting (with lock tight) and then run the vent hose up to the inner fender somewhere...
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  #6  
Old 01-21-2022, 02:20 PM
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Quote:
Originally Posted by mwood65
... then run the vent hose up to the inner fender somewhere...
From the factory, they run it up to a loop clamp on one of the radiator bolts. The end of the hose has a vent cap that should seal out large amounts of water. Like this, but $10 each seems outrageous.

www.summitracing.com/parts/rnb-924-284
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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Old 01-21-2022, 03:12 PM
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  #8  
Old 01-22-2022, 03:13 PM
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Well....


The diff was cleaned out thoroughly and a Fel-Pro gasket installed, then filled with new gear oil.


No leaks so I guess it was a win!


All the gears look great inside so it should be all good now.


Trans drained and re-filled with new gear oil and the transfer case also.


Everything is good now and after I change the rear gear oil it will all be 100%.



Don't know yet if the rear diff got water in it yet but either way it needs to be changed but I need to get more gear oil, a gasket and more brake kleen. That's a job for tomorrow....
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  #9  
Old 01-23-2022, 11:08 AM
inkedmonkey inkedmonkey is offline
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When I changed the diff fluid in the front of mine, I found a foamy mess. No idea what caused it so I just cleaned it out and put some new fluid in it.
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  #10  
Old 01-28-2022, 11:06 AM
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When I changed the muck in the front diff in mine, it all dribbled out through the gap where the axle tube meets the pumpkin. Guess my axle is probably bent.
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  #11  
Old 01-31-2022, 01:35 PM
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Quote:
Originally Posted by rang-a-stang
When I changed the muck in the front diff in mine, it all dribbled out through the gap where the axle tube meets the pumpkin. Guess my axle is probably bent.
I would look for cracks in the housing casting. You could also use an electronic level and see if the left and right tubes are out of level with each other.
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Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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  #12  
Old 02-09-2022, 05:15 PM
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Find an old skool welder and have him/her weld around it. Pretty common that the press fit/seal/glue could fail on them.
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