Shift Solenoids: Minor or Major Repair?

摘要

In a recent article on the 6T70 series transmission, we mentioned performance codes replacing gear ratio error codes. The article covered in part a little about diagnosing these types of codes. Originally, we saw performance codes being assigned to shift solenoids. As time has progressed, we see more transmissions having solenoids handling both shift scheduling and shift feel simultaneously. Performance codes for these solenoids have a different approach than a shift solenoid being used to just control shift scheduling. In our 2014 ATSG seminar, we used two different Toyota transmissions as an example of one approach a tech can make when dealing with a shift solenoid performance code. The idea is to determine as quickly as possible if there is a major or minor repair associated with the performance code.