How to check if your torque converter is engaging. 4L60e TCC switch

How to tell if your TCC (torque converter clutch) is engaging.

[@justinbarrell4965]

Thanks for making this video, super helpful for the LS swap I’m doing in my ‘64.

[@vencilldavid]

You’re welcome! Hopefully my pain is your gain! Anything to help others keep the frustration down during a build 👊🏼

[@TerryHutchens-c3u]

Very explanatory, kudos. Thanks

[@vencilldavid]

Thanks for commenting! I’m just happy it’s helped a few people out.

[@papergatorzfedducca7998]

New subscriber bro!!🔥🔥🔥

[@vencilldavid]

Thanks bro! 👊🏼

[@tommyjm83]

How do i do this with mine. I'm using the factory harness, and ecm that came with my engine. DBW. My truck is a 1986 C20 it also came with cruise control so my brake switch is 2 sided. Cause I'm trying to figure out how to wire this with the factory harness that my engine came with

[@vencilldavid]

What model and year are your engine? Are you running the 4l60e?

[@koolairbros7358]

Hello. I have issues with my car stalling in reverse and drive. I have a 90 silverado and I used my existing brake switch. I have the purple wire coming from the TCM I believe. It says that wire need to go to 12v when brakes are applied. Am I suppose to reword in this brake switch instead?

[@vencilldavid]

The stalling could be a few different things. Even if the TCC switch is wired wrong or not wired at all; it wouldn’t cause the engine to stall. You are correct, the purple wired goes from the TCC switch to the PCM; then the red wire goes from the switch to a keyed on power source (fused) the brake switch should be the same; it should have four or five (if equipped with power steering) coming off the switch. Did you swap a newer engine out onto your Silverado?

[@andresmedina2827]

Having the same issue on my swap

[@koolairbros7358]

Hello. So I figured out what was wrong. My TCC is wired correct. My issue is a part called the pressure regulator valve. When you install a torque converter” circle d with higher rpm “2800”and triple disc, one out of 10 transmission need the regulator valve replaced with a sonnax. It allows more pressure during low rpm conditions I believe. It is on the circle d website.

[@andresmedina2827]

@@koolairbros7358 oh nice ! I still cant figure mine out lol and mine is stock