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There are about 21 different speedo driven gears for the tranny, depending on trans type (auto/manual), diff ratio, and tire diameter. If you can tell me your trans type and what the current speedo driven gear is (color and number of teeth), and about how many miles-per-hour your speedo reading is off by, I can give you a pretty good guess about which speedo driven gear you need to get for your tranny. I'm looking at a table in the Zip catalog, btw...
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: what color & how many teeth? (Gator81)
My 70 has the four speed and a 3.36 rear. When I pulled the tranny gear it was blue. I don`t remember the tooth count though. Hope the color is enough to get you what you want.
Here's what I'm in the process of doing. First, I borrowed a GPS to find out how far off my speedo is (about 5 mph at 70). According to the Zip catalog, I need a replacement gear with more teeth. Next, I'm going to take a look and see what color the current gear is. Then I'll be able to get gears with one and possibly two more teeth by referring to Zip's color coding chart. Finally, I'll replace the gear and check again using the GPS (the owner is in no hurry to get it back).
My 70 has the four speed and a 3.36 rear. When I pulled the tranny gear it was blue. I don`t remember the tooth count though. Hope the color is enough to get you what you want.
Color is the only thing you need to worry about if you are just replacing it with an original and keeping the original tire height, tranny gear ratios and rear end ratio. If any one of the ratios has been changed then you need to figure out which gear you need.
John
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