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Originally Posted by Hatterasguy
...what speed would an SDL be going in 4th gear at 5k rpm? (I am math challanged  )
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Turning the engine at 5000 rpm with a 2.88:1 differential and P205 65R15 tires (25.49" diameter), the theoretical speed (with no slippage...but jeez, at that rpm the converter might as well be a locker!!!) would be 131.65 mph. If you could go against the governor (5400 rpm), you'd be making 142.1 mph.
I can't remember the actual ratio of the SDL so I guessed the diffy ratio at 2:88. I have all this in an Excel spreadsheet so changing the numbers is NBD if I'm wrong.