1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

rear gearing question

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Old 02-20-03, 02:33 PM
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The AUTO DOCTOR

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rear gearing question

ok i asked in the general auto section.... no replys so ill ask in here. how can i tell what gear # i have... i got a set of aftermarket gears a while back and i forgot what they were... do i divide the # of teeth on the ring by the # on the pinon? i dont see any markings on the r&p so im lost
Old 02-20-03, 02:47 PM
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There is an equation for finding out top speed depending on tire size and gearing, can you do it backwards?

I think the equation is on the Racing Beat website.
Old 02-20-03, 02:48 PM
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Look on felixs site. It is in my sig. He has a chart there IIRC that gives tooth counts.
Old 02-20-03, 02:59 PM
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http://www.csgnetwork.com/rnggrpinioncalc.html

try that
Old 02-20-03, 03:47 PM
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It's easy, you divide the number of teeth on the ring by the number on the pinion. To work it out just put a mark on one of the teeth with a marker pen and start counting.
Old 02-21-03, 09:40 PM
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yep 11 & 43 so a 3.90 i was robed
Old 02-21-03, 11:21 PM
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isnt that stock?
Old 02-22-03, 09:13 AM
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Yep, 3.93 is stock.
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