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Re: Rebuilt 4R75E, 1-2 and 3-4 shudder
Posted to Transmission Forum on 10/14/2017

the concerned you mentioned

1- either sticking thermal valve very common and most likely the problem you have. 2- aftermarket EPC installed out of calibration 3- corroded wiring harness and bad grounds.

for future reference in do such transmission, i do re... Login to read more.