correcting speedo

97on37s · #1 08-10-2006, 08:17 AM

Does anyone know where I can get a one of the those plastic speedo gears that goes in the tranny to correct the speedo?

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adrianspeeder · #2 08-10-2006, 08:59 AM

Ford parts counter. My dealer even has a chart sayin what gear for what tires.

Adrianspeeder

97on37s · #3 08-10-2006, 04:10 PM

ok thanks but do they carry the gear? I already know I need a 39 tooth.

97on37s · #4 08-13-2006, 12:40 PM

Does anyone know how to get the correct speedo gear? I need I know the one 2 get. The dealer said I need to make sure before they order it. please help.

adrianspeeder · #5 08-13-2006, 02:45 PM

I'm confused.

Quote:

I already know I need a 39 tooth.

Quote:

I need I know the one 2 get

MitchF150 · #6 08-14-2006, 12:04 PM

The stock gear is usually a 19 or 20 tooth gear. I had a 20 tooth with 3.55's and 29" tires. When I got 31" tires, I put in a 19 tooth gear. This corrected the speedo/odo. (my speedo was 'slower' then actual, so I needed to speed up the VSS)

With 4.88 gears and 37" tires, you are about the same as I would be with 4.10 gears.... I'd guess you will need either a 21 or 22 tooth gear.

What's the number of teeth on the gear you have in there now? How far off is your speedo now? My guess is that you are seeing higher mph and running more miles then actual, correct?

Mitch