2001 Ford Taurus Bubbles in tranny fluid

Tiny
AB_SOOD
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 64,000 MILES
I noticed air bubbles in the tranny fluid, few weeks ago(when it was shifting bad), the fluid level was not too full / not too low.

I spoke to a shop, and on his advice, I added 1 quart of ATF, and the bubbles disappeared for 2 weeks, and then they re-appeared after 2 weeks.

This time, I added another 2 quarts of ATF, and the bubbles again dis-appeared for 2 weeks, and re-appeared again. The tranny now has lot of fluid.

There is no leak in tranny, I got it checked by the shop.

Yesterday night after driving 40 miles, I checked the fluid, and there were no bubbles.
Today morning I checked again after same 40 mils drive, and the fluid was full of bubbles.

I dont know what changed in these 2 trips, which is causing bubbling.
The fluid is in good shape, and there is no leak in the Tranny.

Kindly advice !

If the car is driven by removing the Tranny dip-stik, can it cause air bubble in fluid?
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Monday, April 6th, 2009 AT 12:50 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Is there a chance the trans is getting hot? Does it have a cooler? And no to the dip stick. Bubbles usualy come from overheating, spinning in snow, ice.
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Thursday, April 9th, 2009 AT 12:09 PM
Tiny
AB_SOOD
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  • 8 POSTS
The Stock OEM Tranny cooler is installed.
And should tranny overheat in a 30-40 mile trip in the cold weather?

Can the following cause bubbles:
1. Clogged tranny filter
2. Clogged tranny vent
3. Additive in the Trannt fluid, I added Slick 50 Transmission treatment

Can a air leak in the return line of the tranny, from the cooler, cause bubbles, without causing the fluid leak?
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Thursday, April 9th, 2009 AT 12:50 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
It shouldn't overheat. As far as the air in the return, that can't happen unless the pump is extreamly weak with very low pressure. And even then I question it. A vent or filter could cause this. No to the slick 50.
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Thursday, April 9th, 2009 AT 8:30 PM

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