Diff ratios
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Discussion

Skyedriver

Original Poster:

21,950 posts

303 months

Friday 12th September 2008
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Cooperman

4,428 posts

271 months

Friday 12th September 2008
quotequote all
Top gear is a 1:1 ratio right through the drive train, so you put a disc protractor on the output shaft, set TDC on the engine, turn the crank exactly one revolution and see how many turns/degrees the output has done. This is your final drive ratio.