My 87 GN read 20% faster at the speedometer than it should. Say, if I'm driving 50 mph the speedometer says 60mph. Also if I drive 1 mile the odometer says I went 1.2 miles. I was told by someone I worked with that some GM cars had reducers on the speedocable right where the cable meets the speedo gears in the drivers side of the tranny. My car just has the cable going right to the "bullet" for the speedo gear.
The rear end ratio is the stock 3.42, the speedo gear in the trans is the correct blue gear so I think this reducer thing could be what I need. Anybody know about it? Thanks
The rear end ratio is the stock 3.42, the speedo gear in the trans is the correct blue gear so I think this reducer thing could be what I need. Anybody know about it? Thanks
