Hi, i have just done a manual swap on my 91 Auto TT and fitted a NA gearbox, iam now having issues with the speedo not displaying the correct speed, when i start the car and move the car forwards a tiny bit it will show 20 mph or more and stay there until i turn the car off i pulled out the speed sensor and it has the the red cog on it.
My question is do i need to fit the blue TT cog to get the speed to display correct or is there another issue
Thanks for the help