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The 4T60-E has a very shallow tranny pan it is good advise to have it over-filled by a quart,,,,under certain driving conditions,,,the trans will
"starve" for oil,,, OK,,,Under high load conditions,,,the line pressure will
rise to protect the transmission from burning out,,this is done by the PWM in the trans,,,this may be adjusted to the heavy side causing this,,
or may not be working properly,,,sometimes adding a bottle of LUB-GUARD,,,synthetic additive will help!!
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