John, one of the the worst things about overfilling apart from leaks is it can also cause aeration problems,(the foamy fluid Joe H mentioned)this is due to the fluid being churned up by the drums and planetary gears.
Aerated fluid takes longer to pressurize the hydraulic circuits.
It can also cause problems with the valve body,causing slippage and consequently making the trans run hotter,which leads to sludge and varnish problems.
Remember: There is only 1 pint difference between the add and full marks,it should be between the two at running temp.
You get the picture......
Last edited by jockbolter50; 09/12/2011 8:29 PM.
