Transmission vent tube is leaking transmission fluid?

Tiny
ELLIOTT DAVIS
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 88,100 MILES
Transmission vent tube is leaking transmission fluid. When full of fluid transmission shift and drives fine. Transmission fluid is red and no burnt smell
Wednesday, February 25th, 2015 AT 10:29 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
This happens when the transmission is over full and the fluid gets whipped inside the foam by the rotating parts of the drums/shafts or one of the filter O rings is leaking. I would service the unit and refill it with the correct amount of fluid. Here is a guide to help.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

AUTOMATIC TRANSMISSION FLUID CAPACITY

Bottom Pan Removal (requires drain plug removal) .................... 7.0 liters (7.4 quarts)
Complete Overhaul (with existing converter) .................... 12.0 liters (12.6 quarts)
Dry .................... 14.2 liters (15.0 quarts)

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Wednesday, February 25th, 2015 AT 12:27 PM

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