How critical is axle ratio?
In the modern day of 10 speed automatics, how necessary are 'towing' gears? By 'towing' I mean anything over 4.xx. These new transmissions have such low first gears compared to just a decade ago, is ...
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What you are missing is "ratio RANGE".
Take your 1st great ratio and multiply it by the final (rear) axle ratio. Write this down. Do the same for your top gear ratio. Repeat for a ten speed transmission.
Ford still offers a 10 speed with a final drive of over 4. This gives you tremendous pulling power when trying to get a very large load moving. If 10th gear times the final ratio is significantly different then your current transmission then you are FB correct. You can comfortable cruise in 7th, 8th or 9th.
The primary reason for 10 speed was to make the steps between ratios smaller so that the engine can operate in more optimal speed.
Take your 1st great ratio and multiply it by the final (rear) axle ratio. Write this down. Do the same for your top gear ratio. Repeat for a ten speed transmission.
Ford still offers a 10 speed with a final drive of over 4. This gives you tremendous pulling power when trying to get a very large load moving. If 10th gear times the final ratio is significantly different then your current transmission then you are FB correct. You can comfortable cruise in 7th, 8th or 9th.
The primary reason for 10 speed was to make the steps between ratios smaller so that the engine can operate in more optimal speed.
