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speedometer gear drive

Questions, answers, help, tips and tech on transmissions.

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groggy1
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Joined: Tue May 31, 2011 5:17 pm

speedometer gear drive

Post by groggy1 » Sun Jan 29, 2012 9:04 am

how many teeth on gear drive on 350 turbo do I need for 373 rear for speedo to read right or at least close

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t5montecarlo
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Re: speedometer gear drive

Post by t5montecarlo » Sun Jan 29, 2012 9:12 am

With a 25-inch tire, you need a 3:1 ratio between the drive/driven gear. You need to know how many teeth are on the gear inside the transmission and then multiply by 3 to get the proper driven gear (the one that is easily removed).

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