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Transmission will "spit up" about 1/2 cup of transmission fluid

Tiny
KEN HARMON
  • MEMBER
  • 2000 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
3 or 4 times a year, my transmission will "spit up" about 1/2 cup of transmission fluid. The repairman cannot find a leak and he says the transmission is operating as it should. The car has had the transmission fluid changed every 30,000 miles in accordance with the owner's manual. The "spitting up" of the fluid occurs after the vehicle has been sitting overnight. The last two times the problem occured, there seemed to be more transmission fluid ejected and the time between the fluid loss was closer. What might be the problem and what will it take to fix it?
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Tuesday, July 28th, 2009 AT 8:12 PM

3 Replies

Tiny
JGAROFALO
  • MECHANIC
  • 489 POSTS
My best guess is that the converter is draining back into the transmission occasionally. This could cause a slight overflow, and might cause some oil to be spilled from the vent. This would be aggravated by parking on a slope.

In any case, it is difficult to diagnose problems that are not easily repeatable. This is more of an annoyance than anything.
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Tuesday, April 13th, 2021 AT 8:06 PM
Tiny
59CHEVY
  • MEMBER
  • 5 POSTS
It could be the gasket that connects the trans and the engine together, it is happening to me right now and this is what my shop guy said was the problem, almost every morning it leaks about 1/8 of a cup but there's no problem with driving it that way as long as you carry some extra trans fluid.
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Tuesday, April 13th, 2021 AT 8:06 PM
Tiny
JGAROFALO
  • MECHANIC
  • 489 POSTS
There is no gasket between the engine and transmission. Possible converter seal or overflow/vent tube.
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Tuesday, April 13th, 2021 AT 8:06 PM

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