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Old 02-05-2017, 02:01 PM   #112
frankslagoon
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Join Date: Jan 2014
Location: Wasilla Alaska
Posts: 537
Re: 4L80E & TH400 Tech.

So I'm doin some more homework.
seems like if the pump and or
pr valve was weak or to many bleed of spots that increasing pressure with RPMs would bring the convertor out of lock up. But if the EPC sol. is screwed up or the cooler line is restricted that the thinner the fluid get the quicker the PR valve will lock up the convertor. Am I thinkin in the right direction ? I don't like replacen parts till I understand why I'm replacen them.
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