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| How to Calculate Rear End Ratios https://slantsix.org/forum/viewtopic.php?t=36418 |
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| Author: | SlantSixDan [ Wed Jul 22, 2009 2:45 pm ] |
| Post subject: | How to Calculate Rear End Ratios |
To check the rear axle ratio accurately, chalk the inboard sidewall of the tire that'll turn and block the other tire (or don't lift it up) so that it can't turn even a little bit. Trans in Neutral, parking brake released. Turn the marked tire through two full revolutions and count quarter-turns of the driveshaft by watching the rear U-joint caps as they come to face the pavement. Divide the number of quarter-turns by four to get your ratio. 16/4 = 4 = 3.91 14/4 = 3-1/2 = 3.54 or 3.55 13/4 = 3-1/4 = 3.21 or 3.23 12/4 = 3 = 2.93 or 2.94 11/4 = 2-3/4 = 2.71 or 2.76 10/4 = 2-1/2 = 2.45 9/4 = 2-1/4 = 2.26 |
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