Preview
Description
App for calculating speeds, final drive and RPM drop when shifting gears. App is setup for a three speed transmission. An input to define torque converter loss. A manual clutch is closer to 100 percent efficient, however a converter could be anywhere from 80 to 98 percent efficient. All input boxes have a typical value entered for reference. Different transmission setups can be named, dated and saved for later retrieval. This app makes quick work of comparing different ratios and underdrive gears.
What's New
Version 1.1 2026-09-17
Fixed a Dark Mode display issue where input values were not visible. Technical Analysis
Package Overview Basic metadata
Bundle ID
Iphone.UnderDrive Current Version 1.1
Minimum iOS 18.6
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