ransley wrote:
What happens if you overfill an auto transmission on a small 4 cil by
1.5 quarts for an extended period. It needs to rev high at first to
shift and some slipping occurs when hot. The dealer has been
maintaining the car under warranty and did a trans service when
warranty was in effect. I don`t check it because its about impossible
to do from the tight location. On the dipstick and in the manuals of
every car I have had it says Don`t Overfill. 1.5 quarts over is crazy.
Is transmission likely damaged.

Overpressure eventually causing seal failures most likely. Leak-by and
slipping is likely result.

Undoubtedly you'll have a hard time collecting but it would appear a
dealer-aided if not totally caused early failure is indicated.

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