5r110 torque converter lock up

imelmo

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Last night I hope to have came across something. Doing some functional tests with a higher end scan tool I came across a soft code p1703 brake switch out of range. After a trip to advanced auto and $14.99 the 35 mile trip back home where it messed up on the way there, no hick ups no flashing tow haul and the torque converter stayed lock in even up the steep grades with me accelerating from 60 mph to 90 mph fairly quickly. Could this be the true cause I would assume since the brake kicks out lock up that it is indeed part of the tcc circuit. Could that be my malfunction?



Just to clarify, you changed the brake switch and that seems to have corrected it?

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207Lobster

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I have this same issue and my brake switch was also out of range. New switch didn't fix the converter popping in and out. but cleared the stored brake code. Still a headache and mystery for me.
 

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