98 4.3 Blazer leaks trans fluid out of vent tubei

Tiny
VEGADAN
  • MEMBER
  • 1998 CHEVROLET TRAILBLAZER
1998 blazer with 4.3 4x4 automatic with 120k miles, there is a breather tube coming up in the rear of the motor with a vent cap like on a differential and trans fluid is coming out of it at higher speeds like 2000rpm, I just traced the hose to the top of transfer case and it is mated with 2 other hoses 1 goes to pvc port and has vacume, and the other went under the battery, do you know why I would get oil out of this breather tube, I just got the truck and the owner said they changed trans fluid and filter, I am stumped
thanks, Dan
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Monday, March 19th, 2007 AT 5:59 PM

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Tiny
JACK42
  • MEMBER
Could be over filled. There are 2 large plugs in the back of the t-case, 1 is a little higher up than the other. Remove the highest one, fluid level should be at the bottom of the threaded hole. If it is higher let it drain and re-cap it. Run the vehicle and pull the plug again, if fluid runs out then you might need to replace the seal between the trans and transfer case
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Tuesday, March 20th, 2007 AT 7:48 AM

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