I used this topic instead of a new one because it's still open.
I don't know a exact solution for this problem. I have the Type 9 N 5-Speed gearbox, maybe from a Sierra XR4i, but I'm not sure. The VSS sensor, from a Sierra with MT75 gearbox, is connected to my PCM, but not to the gearbox. The engine runs fine, but I want to reduce the fuel consumption. When the engine is in thrust, fuel is injected because the PCM thinks my car is standing. If the VSS is connected, the PCM knows if engine accelerating or thrust.
1st solution: I've heard about a split speedometer cable from a Sierra. Between the cable you can put in the VSS. Who knows from which type of Sierra and which year it is?
2nd solution: also I heard, that you can fit on the right side in the gearbox the speedometer cable, and on the other side the VSS. But which VSS I have to use? And I need another speedometer pinion gear.
thanks for your help.
Following are 2 pictures from a german forum: