55 Belair Wagon rear end ratio questions - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-16-2011, 10:15 AM
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55 Belair Wagon rear end ratio questions

I Posted Before That 1,2,3 Gears Caused The Rear End To Brake Loose With Out Getting On It
The Reply Was To Check Gears In The Rear End!
This Is A 55 Belair Wagon It Came Out With Straight 6 With A 2 Speed Trans
Ive Jacked It Up And Spun The Tires Around And Watched The Drive Shaft
If The Shaft Goes Around 3 Times The Wheel Has Gone 3/4 Around Does This Meen Its A 3.75 Rear End If I Keep Going 4 Times Around The Wheel Has Made More Than
1 Time Around
Thanks Woody

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Last edited by 55 woody; 02-16-2011 at 10:16 AM. Reason: SPELLING
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Old 02-16-2011, 11:52 AM
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people need to recognize that a rear axle ratio is really a RATIO. Im not singling you out, because youre asking questions.
rear axle ratios are expressed as x.xx : 1 (for example 3.08:1 or 3.73:1). You have to get the axle to make 1 complete revolution. This is not the best way to do it because of open diffs vs a Limited Slip etc.

So you could have 4.11:1, or 4.56:1, or 4.66:1. To make the math easier (it takes 2 people) Ive turned the DS to get the wheel to turn 10 times; then divide that answer by 10. This makes it easier to visually tell the difference between 3.23, 3.31, 3.42 for example because you don't have fractions, just nice whole numbers. (34:10)/10 would be 3.42.
3.31 would be 33 turns and 32 turns would be 3.23
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