700r4 Lockup Wiring Vacuum Switch

Sep 9, These two wires went to either side of the temperature switch. brakes or stepping on it to pass would lower vacuum and cancel the lockup.

Feb 5, Use manifold vacuum for the vacuuum switch. It should kill power to the lock-up solenoid circuit and release the converter when the throttle.

How to wire your R4 to lockup in fourth gear without a computer. Low- vacuum switch wiring harness – Junkyard donor truck or 2 slim female spade.

This easy-to-install lockup wiring kit for R4 and R transmissions from TCI ® including gasket, wiring harness, vacuum switch, 4th gear pressure switch. what should i use in my r4 conversion 71 wiringall.com internal manual vacuum solenoid actuated lock up kit.

or the brake.Both the R and R4 use a lockup-style torque converter that requires 12 volts and a pressure switch to lock up in Fourth gear. This eliminates the need for a manual switch. When retrofitted into early muscle cars, these trannys require the pressure switch to be changed and a few wires rerouted.

Sep 16,  · Not ideal. bowtieOD sells a nice lockup kit for about $ that locks up in 4th and only disengages when the brakes are applied.

I went with that option. Thier kit comes with all necessary valves, plugs and wiring and comes with very easy to read instructions (which are also available on thier website wiringall.com).

Feb 17,  · If you have the vacuum switch wired in series with the pressure switch it should disengage the TCC lock up as well.

I hope this helps. I have done basically the same thing on my R and it works beautifully.

This easy-to-install, universal lockup wiring kit makes it possible for you to install a GM R4 or R transmission into a non-computer controlled street rod or muscle car. It is also beneficial when removing a factory computer in pre vehicles with a R4 or R transmission.

Nov 23,  · Need help wiring adjustable vacuum lockup switch for a r4. You do not have to have the vacuum switch for the lockup to work but it provides more automatic control like when going up a hill or W.O.T.

the vacuum will drop and the switch will disengage the lockup.

You can use your existing brake switch to do this. I plan on wiring mine.Wiring a Lockup-Converter Pressure SwitchWiring a Lockup-Converter Pressure Switch