my actron code scanner gave code 653 transmission control switch did not switch during key on engine running self test .my truck will run fine during highway cruising speeds, tthen suddenly loses all torque. engine revs and if i dont get foot off accelerator it slams back into gear.problem is becoming more frequent.
i cant find switch on internet.
where can i find switch?
what else could be problem?
can i do repair myself?(novice)
also getting codes853 and 663 which are not listed in actron book.
i am wary of transmission shops.
please help its an otherwise fine truck and almost paid for!

 

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Would the MLPS have anything to do with this?