My Dad just bought a 97 with 57k on a rebuilt trans. We have both been running 1st gens for years, and find the lockup almost instantly when hitting OD annoying. I would like to put an interrupter switch in series with the lockup solonoid, so the lockup can be engaged when wanted. Switch on, normal operation, switch off, no lockup. This way the trans should act like a 518 until lockup is wanted. Has anyone done this, or know if it will work, and which wire to interrupt? Thanks

 

Actually you get a 3 way switch.
auto (PCM controlled) lock
off
forced lock

http://www.tstproducts.com/Torque%20...p%20Switch.pdf
Follow the TST instructions for a general layout EXCEPT deviate as described below
Purchase a double throw (DT) switch with center off

• Cut the orange/black wire leading from PCM B11
• Attach new wires to each of the cut ends and run both inside the cab to your double throw with center off switch.
• Attach the wire that is conected to the transmission side to the switch common terminal.
• Attach wire to PCM to either switch terminal.
• Run a jumper from the other switched terminal to ground.

 

Saw that link. That does not do what I want. Read post again.

 

Re-read my post. I gave you the supplemental instructions on making a single mode forced lock-up into a 3 mode

I edited for clarity. Make better sense now?

 

So with this switch in the off position, the converter will not lock up, and the rest of the trans will work normal?

 

Off is off. PCM cannot trigger lockup. Transmission will shift 1-2-3-OD or hold in 3rd if you use the OD lock.

What part of N Dak? We're having a get together in Northwood next month.
https://www.dieseltruckresource.com/...d.php?t=133890

 

Well, that's what I'm after. Thanks alot for your time. Next time I can get it to stop, I'll try it. Live in Minot.

 

Usually get some people from the Minot area. A guy from Burlington got high hp last year. Don't know about this year as he sold the hot rod.