Quote:
Quote:
My thoughts:
Excessive windage in the rotating parts, which could aerate the fluid. The normal fill is about the bottom of the valve body, so it doesn't take much higher to reach the rotating parts. And aerated fluid could be bad news.
 One quart of over fill can kill most automatic trans in less tha a 100 mile trip at 60+ MPH  way better to be one pint low than one cup overfilled 
sorry I have been in the trans buisness 25 Plus years and I call BS on this one a quart overfilled will do nothing to a unit but maybe a little leak will not damage the unit in any way I have driven my personal cars overfilled for over a 100k with 0 problems.
There are a number of units the ATSG wants you to overfill.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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