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As I was under the greasy beast trying to change the hoses on the gas tank vents, I believe that I saw that the vent for the transfer case (NP229) ends high on the firewall with a 180° downturn (like a candy cane!) Is this low tech solution the actual vent? Could the same solution be utilized for the missing front diff vent?
Thanks for the help.
1990 Grand Wag
R4B/Holley 4160
I might lament the amount of grease and oil on the underside, until I think about the lack of rust.
If the '90 is like earlier models, the front vent should have a plastic cap under a clamp on one of the radiator bolts. This connects to a rubber hose that goes to a niple on the differential. I think the nipple should be on the axle tube, near the center of the axle.
You could do the U-bend for the front axle, or a small fuel filter works too. There are replacements available for the original-style vents - not for Jeep but for other brands. https://www.dormanproducts.com/p-89204-924-284.aspx Any parts store can get Dorman stuff in a day at most.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.