mystic1550

hi, after installing 355 gears, my spedo is reading 100 mph in my neighborhood. i figured it would be off by 5 mph but its more like 50mph. considering 327 is stock, why do i have this big time spedo error. this is an electronic pick up so any suggestions what to do would be appreciated.

8URVTECH

DAMN...lol 50 mph? idk what to tell you. except that your just gunna have to take it to some kind of performance shop. they will probably know whats up.