I've got a 700r4 in my LT1 and I was wondering what I needed to do to get the stall to lock up what I needed to do to get the speedometer working. Can anybody tell me where to splice into for these 2 connections? Are there any online how-to's, maybe?

 

For the lock up you just need to splice switch into the plug in the side of the tranny. Apply 12 V it locks. The only thing is you need to wire it through a relay that will break the 12V signal when you hit the brakes!!

 

Would I be better off tapping into the actual braking system or just a brake light?

 

I tapped into the lighting system right at the brake pedal.

 

Oh cool. How did you hook up your speedometer?

 

I have a 200-4r (Almost same thing) and a ls1, I just bought a mechanical to electric converter from dakota digital and ran it through the PCM.