Lenco Transmissions (tech)

LENCO transmissions are a planetary design.
Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio.
In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. Each sun and planet
gearset provides two speeds. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio.
Each LENCO transmission is thus a two speed and is housed in one dedicated two speed case. You achieve more than two speeds by combining multiple cases
 For example, a three speed requires two cases, A four speed requires three cases, A five speed requires four cases and a six speed requires five cases.
Since each case contains one gearset and provides both underdrive and direct drive, multiple cases(gearsets) provide multiple underdrive ratios.
You must multiply each case�s underdrive ratio in order to determine the first gear ratio. In the example of a four speed, the case nearest the engine would
contain a 1.37 ratio planet gear set. The middle case would also contain a 1.37 planet gear set. The rear case a 1.31 ratio gearset. By multiplying these
 three ratios you come up with a 2.46 first gear ratio. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Final drive ratio is 1:1.
You will need to add a LENCO reverse unit in order to back up.  RATIO CHART
It is not necessary for the driver to disengage the clutch when shifting from ratio to ratio since all shifting is done with the engines clutch fully engaged