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Subject Something I read on slight manual tranny overfill/underfill.
     
Posted by aquariuscsm on November 15, 2010 at 4:57 PM
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Message I was Googling manual tranny shifting problems and came across an article on overfilling manual transmissions that have shiftability issues. Since most manual trannies use splash lubrication,this particular article said he`d overfilled his car`s manual tranny through the breather hole and it made it shift day and night better,especially once it was hot.

Then I found a GM tsb saying to UNDER fill the manual tranny by a quart to fix gear crunch and notchy shifting.

My car`s tranny only crunches 1>2 once it`s hot,but when it`s cold it shift to 2nd butter smooth. Would a slight overfill make shiting smoother when the tranny is good and hot? Since our trannies aren`t pressurized,would the overfill be a good thing,lubrication-wise,or would it cause an adverse reaction? I`d been thinking on this because once my Amsoil MTG comes in (I ordered 4 quarts) I`ll be changing the fluid.

     
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