5r110 torque converter lock up

[imelmo]

Over 600 miles and around a rock slide on i75 through some of what I would call a very challenging pull and absolutely no hick ups.

That is so weird.

.

 

[imelmo]

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?

.

 

[rocklefty19]

Yes. After multiple torque converters it appears the brake on off switch was the culprit

 

[ibhurln]

does anyone have the part number for the brake on off switch? thanks!

 

[bismic]

The stop light switch down by the pedal is:

F87Z-13480-AA F87Z13480AA - Ford Parts Giant

www.fordpartsgiant.com

If for SOME reason you are wanting the switch/transducer on the master cylinder, I BELIEVE it is:

2L1Z-2B674-AA 2L1Z2B674AA - Ford Parts Giant

www.fordpartsgiant.com

 

[Mark Kovalsky]

The brake on/off switch is on the brake pedal, not the master cylinder.

 

[207Lobster]

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.

 

[207Lobster]

Anyone else in this convo thought they fixed it but no?