The MGA With An Attitude MGAguru.com MGAguru.com GEAR RATIOS Commonly Used In The MGA - GT-102A Standard Gearbox   Input 4th Gear 3rd Gear 2nd Gear 1st Gear Reverse Mainshaft Teeth 21 direct drive 25 31 28 28 Reverse Idler Teeth   17/13 Layshaft Teeth 30 - 26 20 11 11 Standard Ratios 1.000:1 1.374:1 2.214:1 3.636 4.755:1 Close Ratio Gearbox   Input 4th Gear 3rd Gear 2nd Gear 1st Gear Reverse Mainshaft Teeth 26 direct drive 29 32 28 28 Reverse Idler Teeth   17/13 Layshaft Teeth 25 - 22 19 11 11 Close Ratios 1.000:1 1.267:1 1.619:1 2.448 3.201:1 Standard Gearbox with Various Final Drives   4th Gear 3rd Gear 2nd Gear 1st Gear Reverse Standard Gearbox -- 1.000:1 1.374:1 2.214:1 3.636 4.755:1 Overall - Short Track Gears 41/9 = 4.556:1 4.556:1 6.258:1 10.087:1 16.566:1 21.663:1 Overall - 1500/1600 43/10 = 4.300:1 4.300:1 5.907:1 9.521:1 15.636:1 20.448:1 Overall - 1600 MK II 41/10 = 4.100:1 4.100:1 5.632:1 9.078:1 14.909:1 19.497:1 Overall - MGB gears 43/11 = 3.909:1 3.909:1 5.370:1 8.656:1 14.215:1 18.589 Close Ratio Gearbox with Various Final Drives   4th Gear 3rd Gear 2nd Gear 1st Gear Reverse Close Ratio Gearbox -- 1.000:1 1.267:1 1.619:1 2.443 3.201:1 Overall - Short Track Gears 41/9 = 4.556:1 4.556:1 5.774:1 7.377:1 11.150:1 14.581:1 Overall - 1500/1600 43/10 = 4.300:1 4.300:1 5.450:1 6.964:1 10.524:1 13.762:1 Overall - 1600 MK II 41/10 = 4.100:1 4.100:1 5.197:1 6.640:1 10.035:1 13.123:1 Overall - MGB gears 43/11 = 3.909:1 3.909:1 4.955:1 6.331:1 9.568:1 12.512

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