My speedometer reads 10mph fast at all speeds and clocks an extra 3/10 mile per mile extra. If I change the speedometer gears with the kits available, how do I determine which teeth ratio to use? I haven't pulled and counted my current speedo gear teeth yet. Thanks.

John

Are you running factory sized tires and wheels? Is the transmission and rear diff all factory original?

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Factory size tires and wheels. Not sure about tranny and rear diff being factory original.

John

You need to find out about the diff and the tranny. Sometimes during a tranny swap the speedo gear gets overlooked. a MB shop should be able to tell you how many teeth the gear should have. A local speedo shop should be able to also.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D