I noticed that my Automatic Trans Fluid was foaming the other day, so I changed the fluid and the filter. But it is still foaming. Also, the transmission will somtimes not use 1st gear or 4th (overdrive), but then if I turn the engine off and wait say 10 mins and turn it back on all the gears work again? Whats goin on? Any ideas why? Trans has 138K miles. Thanks -Chris

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If a law is unjust a man is not only right to disobey, he is obligated to do so -Thomas Jefferson

How much fluid did you put in it? It sounds like it is overfilled.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Well I put in till it got to the cold line, then drove around and checked it and it was on the hot line? Thanks for the help though, guess Ill just change it again and put in a little less?

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If a law is unjust a man is not only right to disobey, he is obligated to do so -Thomas Jefferson

You didn't mention which model you have, but generally it is recommended that when filling up tranny fluid, you start out with 4 quarts. Start the engine and put the gear selector in each gear for a moment or two. Return the selctor to park and check the level, add accordingly. Most trannys take 6+ quarts. Check your owner's manual for specifics.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member