« previous next »
Pages: [1]   Go Down

Author Topic: np 208 leaking out vent tube when in 4wd  (Read 1815 times)

Offline pholliday1

  • Junior Member
  • ***
  • Posts: 632
  • 1990 V3500 Crew Cab
np 208 leaking out vent tube when in 4wd
« on: November 08, 2012, 12:14:20 pm »
Does not leak in 2wd, vent line has been extended by way of rubber hose and vent cap up firewall. Fluid level in case is normal and im not losing tranny fluid into t case. Only when i'm in 4wd it "leaks" out the vent line.
Logged
VETERAN AND LIFETIME NRA MEMBER. WHAT DO YOU STAND FOR?
1991 V3500 CREWCAB SRW 454TBI GMC
1991 v3500 crewcab SRW 454tbi 480le 6" lift
1990 V3500 crewcab Dana 60 FF 14b 5:38 ratio 40 inch 11" lift
1989 v3500 crewcab 454TBI 5" lift

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18467
    • http://www.73-87chevytrucks.com
Re: np 208 leaking out vent tube when in 4wd
« Reply #1 on: November 15, 2012, 07:02:02 pm »
that is strange, it is going up the tube?
Logged

Offline pholliday1

  • Junior Member
  • ***
  • Posts: 632
  • 1990 V3500 Crew Cab
Re: np 208 leaking out vent tube when in 4wd
« Reply #2 on: November 16, 2012, 08:46:24 am »
Yes it weeps out vent line. I've come to the conclusion that it has to have something to do with transfercase seal. Theres no other known condition to cause this effect. Very simple to pull transfer case and change seal, (lots of room with body and suspension lift) i'll report back with my findings.
Logged
VETERAN AND LIFETIME NRA MEMBER. WHAT DO YOU STAND FOR?
1991 V3500 CREWCAB SRW 454TBI GMC
1991 v3500 crewcab SRW 454tbi 480le 6" lift
1990 V3500 crewcab Dana 60 FF 14b 5:38 ratio 40 inch 11" lift
1989 v3500 crewcab 454TBI 5" lift
Pages: [1]   Go Up
« previous next »