Front diff leaking oil out of vent tube
#1
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Join Date: Feb 2005
Location: California
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Front diff leaking oil out of vent tube
twice I've had gear oil come out of the front axle vent tube which is mounted in the engine compartment just below the air filter box. The first time it happened I was pulling my 5th wheel over the pass between Oregon and Ca, the last was yesterday going over Donner Summit. Going over Donner my truck was empty and I was doing about 70mph, stopped at rest area and saw that dreaded drip. I took it to the dealer the first time and they couldn't tell me why it was happening. The front diff isn't over full and with my limited mech. knowledge I can't understand how oil can be forced out of the top of the vent. Any ideas?
Thanks
Gary
Thanks
Gary
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#2
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Air Pressure? Both times this has happened it was while you were going over a high altitude pass. Have you checked the diff oil level? I believe the correct level is 3/4" below the fill hole.
#4
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Almost every 4wd Dodge I know has had this happen at least once. Most times the owners don't know unless they pull the airbox.
Have no idea what causes it but it appears to be "normal".
It makes a mess more than anything, you really don't lose enough fluid to be conserned.
Have no idea what causes it but it appears to be "normal".
It makes a mess more than anything, you really don't lose enough fluid to be conserned.
#7
Remove diff. vent breather and hose, clean and blow out both, check for hose kink or collapse. Replace diff. vent breather if it does it again, if it seems to be unobstructed. Check oil level.
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#8
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What shop? Reputable? Our fleet is maintained by a local reputable shop and we always get an update on fluids, filters, new issues when returned. No combustion in the diff means maybe it's due if it is getting dark, they get hot when pulling trailers...I flush the brake fluid when I do the brake jobs, it gets dark after about a year....
By checking it they may save you the difference between a gear oil change and a diff rebuild....
Welcome to the site.
By checking it they may save you the difference between a gear oil change and a diff rebuild....
Welcome to the site.
#12
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