Print Page - 700R4 or 200-4R torque converter lockup

TAC Tech => Tips & Tricks => Topic started by: silver78 on January 07, 2022, 11:24:41 AM

Title: 700R4 or 200-4R torque converter lockup
Post by: silver78 on January 07, 2022, 11:24:41 AM: Swapping in an overdrive trans? check out this older article I saved. I believe some of the GM parts are no longer available but if you have an old GM vehicle sitting around you may have them already.
Title: Re: 700R4 or 200-4R torque converter lockup
Post by: Wallington on January 07, 2022, 08:56:46 PM: I've had that GM lock-up delay valve on my parts list for years, never seen one for sale, or the alternatives. I have one that looks the same from B&M or Painless, not sure how they compare but articles seem to ignore them and reference the GM version (Delco 214-479, Standard DSV-31)
Title: Re: 700R4 or 200-4R torque converter lockup
Post by: firebirdparts on January 10, 2022, 06:11:44 AM: Interesting grounding through the brake lights. The 200-4R's controls vary based on the original application, and I would bet some of them have an internally grounding switch which would require you ignore the brake lights or put in a relay to address that. It's not entirely necessary in my opinion; if you stop, the TC will not let go until it drops out of 4th gear or possibly 3rd (the pressure switch) and that's okay.
Title: Re: 700R4 or 200-4R torque converter lockup
Post by: Wallington on January 10, 2022, 08:59:57 PM: Just like Cruise control, often wired through the brake pedal/lights to drop out.
Title: Re: 700R4 or 200-4R torque converter lockup
Post by: firebirdparts on January 15, 2022, 04:04:21 PM: Quote from: Wallington on January 10, 2022, 08:59:57 PM
Just like Cruise control, often wired through the brake pedal/lights to drop out.

I've never seen cruise wired to ground through the bulbs, but I admit though I rarely have any trouble with it on anything I own, it might be common.