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Old 01-05-2008, 03:23 PM   #1
bad68bowtie
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Question Speedometer gear?

I'm gonna be putting some new tires on the truck hopefully in the next day or so and I'll be going down a little bit in size. I had written down somewhere how to figure up how many teeth you need on the speedometer gear but of course now I can't find it. Does anybody know how to equate this or have a link to figure it up? If one of y'all knows how to do this offhand I'm gonna be running 255/60/15 tires with a Turbo 350 and a 3.08 rear end. Thanks.
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Old 01-05-2008, 04:10 PM   #2
Rugman
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Re: Speedometer gear?

I Just Went Through This I week Ago! You Need 20 Teeth. The gear is Blue.
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Old 01-05-2008, 04:13 PM   #3
68gmsee
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Re: Speedometer gear?

Here's one site. There are others.

http://www.bgsoflex.com/speedo1.html
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Old 01-05-2008, 04:18 PM   #4
BLE 'BURBAN
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Re: Speedometer gear?

Also check out TCI TRANSMISSIONS TECH PAGE for speedo gear calculations.

http://www.tciauto.com/Products/Tech...eedo_gears.asp
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