A518 won't shift into overdrive
Funny,
I just did this swap and I used their kit, but the OD woud not kick in. I put a light in the ground circuit with the rocker switch so when the pressure switch grounded the light would kick in. So I started checking everything first the fuse I put in from power source to relay...good, relay contacts closed and power went to the vacuum switch.
With car turned off (NO VACUUM being pulled) and using a test light the connector marked NO had power coming out and going to the trans. THe connector marked NC didn't. Started the car and pulled the throttle a bit I used the test light again, this time, the connector marked NO had no power and the one marked NC had power.
THe vacuum switch was assembled wrong, had to put the wire leading to the connector on the case on the NC connector.