This shows the difference between the old 2-speed detent plate (below) and the new one for the C4. You could almost take a Dremel or file and grind out the extra metal but that might lead to cracking where the opening gets close to the bottom. The red line indicates the shape of the old plate. As you see, they've added more metal to prevent it from cracking. Next –––>

Previous Page

Main C4 Page