If they did over fill the tranny you would have noticed some slipping and similar condition as low fluid would cause do to the gears churning up foam and cause air bubbles and make the fluid spongy. The air bubbles can cause overheating, fluid oxidation, and varnishing. This can interfere with normal valve, clutch, and servo operation. Foaming can also result in fluid escaping from the transaxle dipstick where it may be mistaken for a leak.
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Wednesday, October 8th, 2008 AT 6:44 PM