Differential/Transmission Gear Ratio Comparison

I see a lot of people asking about which gears to get and how the auto and manual transmissions stack up with those gears. So, here's a spreadsheet I made, comparing factory gear ratios with auto and manual transmissions. It also includes maximum theoretical speed in each gear. It does not take into account the laws of physics such as drag and friction. Don't think your car is actually going to go 277mph by putting 3.15:1 gears behind your manual transmission. ;)

Link

One interesting point that may be worth mentioning is the final drive ratio of a 3.15/Auto car (Box C6) vs a 3.55/Manual car (Box G15). A 3.15:1 Auto car should probably do dyno pulls in 4th.