04-10-2018, 07:18 AM
If you replace the worm wheel and pinion with same from a 3 speed the speedo will read right.
It means stripping the output spider and removing the rear cover from both boxes . there will be a small amount of machining to the bronze worm to fit it to the 4 speed box.
Just make it measure the same as the 4 speed one. the worm has more starts on it which gears up the speed about 2 x.
Cheers Steve H
It means stripping the output spider and removing the rear cover from both boxes . there will be a small amount of machining to the bronze worm to fit it to the 4 speed box.
Just make it measure the same as the 4 speed one. the worm has more starts on it which gears up the speed about 2 x.
Cheers Steve H