I am trying to find a TCS Relay Switch (LH Dash) for my 1970 Coupe 4-spd. It mounts on the left hand side of the firewall near the windshield washer moter. When I took it off, one of the spades for a connector broke off (rusted). I have looked all over the internet at the usual vendors but no luck. Anyone know a good source I could check?

 

I found a few places with the automatic trans TSC switch, but can't seem to find one for the manual trans for 1970. Unfortunately, 1970 was a unique year for emissions parts, they changed again for 1971.

This was the only one I found that didn't specify auto...

http://www.parts123.com/PartFrame.as...TS_OF_MICHIGAN

bill.

 

If all else fails, try www.pacvette.com It's a Vette wrecking yard and they do have some new parts.

 

I can't believe it. I found the part. It was the one wrwalke found at Vette Products of Michigan. They didn't know what the part was but the part numbers matched the one I have. Thanks for all the help.

 

For the archives...

Unless you are doing a trailer queen or show car... If you check Chilton's, the TSC relay is just a 12volt 15 second "normally closed" delay relay. You can substitute a bunch of equivilant parts from headlights (fords and chevy's that have that "keep the lights on after you pull in to the driveway thing), and AC systems. The 1970 system allowed 15 seconds of full vacuum advance to make sure you got good advance when starting the car. Unless you are under or over temp (like under 60F or over 230F, lower gears would have a limited vacuum advance for emissions. High gear would have full advance.

Ick. I'd personally just rip the whole damn thing out and go with normal vacuum to the distributor myself. Too many moving parts and spark variables in that mess.

bill.