Will a manual TC lockup switch work without the switch on the brake pedal?

[gnx7]

I did a GN conversion on my RX-7 which was originally a manual transmission car. It doesn't have the switch on the brake pedal to signal the ECM to unlock the TC when braking.

If I make a manual TC lockup switch do I need the sensors on the brake pedal or will the manual switch just lock that sucker up no matter what?

I'm going racing this Saturday and need the extra 2-3mph and 2 tenths.

Thanks guys.

Mark

 

[Roc87]

I might be wrong but I thought the signal to the ecm was the same as to the brake lights, just a 12+ volt.

With a manual TCC lock up switch, it'll lock it up no matter what, even with the brake switch hooked up, and while braking.

 

[gnx7]

eggsellent!

 

[Roc87]

Great job on the swap, Going into another GM product is a big enough pain, I could only imagine going into an RX7!

 

[TurboBob]

the brake switch feeds +12v to the trans, the current goes thru the solenoid and then to the ECM. the ECM grounds it's wire to lock the TCC.

Make sure you have a complete circuit.

Shouldn't be a big deal.

Let us all know.

Bob

 

[Sleeper]

Mark
FWIW
The brake pedal switch also activates the EGR valve and wastegate solenoid as well as the cannistor purge (I doubt you have that )

Paul

 

[JRGN]

Hey, I ,may be wrong here but B&M makes a kit part # bmm70244 that lets you lock up the trans at whatever mph you want, summit carries the kit. HTH