To switch the twincam electric fans I put an adapter in the hose from the thermostat to the rad.



After that I put the loom and ECU in. Then it was time to connect the fuel lines.






Filled up the PAS and the coolant system before firing it up for the first time. Luckily it ran straight away, so no errors made whiling modifying the loom.






Time for the first test drive. Everything was fine, although I noticed the speedo wasn't working. It turned out the Granada gearbox didn't have a mechanical speedo drive as the Granada only uses the electrical signal from the gearbox.

Fortunately I still had the box from the twincam, so I took the speedo drive from that one. Jacked the Sierra up again, took the exhaust, heat shield and gearbox mount off.





The speed sensor from the twincam box.



But after checking it a bit better I found out the worm wheel inside the gearbox was also different, so I also had to swap those.

Picked up some tools from the local Ford garage, who are always very helpful.



A new 12-sided 30 mm nut, a new oil seal and a speedo cog with 23 teeth. Originally the twincam had a speedo cog with 22 teeth, but that is not the correct one.
And a 30 mm, 12-sided deep socket to get the nut from the output shaft of the gearbox and pully puller to pull the drive flange from the output shaft.

Removed the flange from the twincam box so I could take out the worm wheel.



The worm wheel that was the reason for everything.



Now I had to do everything again but now underneath the car to remove the old worm wheel and fit the new one. The Sierra and Granada one next to each other, the difference is quite clear...



Fitted the speedo cog and the cable to the box and put the gearbox mount, heat shield and exhaust back on. Finally ready!