I do not know a mechanic in Norwalk. I replaced the transfer valve solenoid assy myself. First I checked the transfer pressure and there was none. That is a sure sign the solenoid assy is bad. If the transfer pressure is good then the transfer clutch plates are worn. To fix this the exhaust has to come down and then the drive shaft. After that the back of the tranny has to come off. I hope it works out for you.
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May your transmission live forever.
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