Magnesium cases are used for both the CS2, CS3 and CS4.Ĭompetition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. Both transmissions are available in 2,3, 4 or 5 speeds. The CS2 handles up to 3000 HP CS3 and CS4 1800 HP. Smaller diameter and shorter length make this transmission a practical choice for use in restricted confines and instances when you have limited distance from the engine to the rear end. LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. You can add additional cases and gearsets that will result in 3 or 4 speeds.Īs with all LENCO transmissions a separate reverse unit is employed. With a selection of 16 first-gear ratios for the two-speed and hundreds more for three-speeds the LENCODRIVE presents you with the opportunity to dial-in your exact combination. A perfect replacement for expensive breakage prone Powerglides, Turlcos, C4, C6 style and Torqueflite transmissions the LENCODRIVE is 100% LENCO and will handle 2500 HP with ease. The LENCODRIVE is the automatic answer for people who prefer torque converter/automatic transmission applications. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. The CS1 Standard Design LENCO is recommended for the most severe applications and is capable of repeatable consistency with a minimum of maintenance. Most often seen in supercharged alcohol and mega HP nitrous cars the CS1 Standard Design LENCO is also commonly used by Pro Mod machines and blown nitro and alcohol drag boats. Lntroduced in 1972 as a 2-speed the Standard Design LENCO is our largest and strongest transmission. All shifting is done with the engine's clutch engaged.Ĭall our technical department at (909) 673-9080 or email us here with any questions you may have concerning function or applications. It is not necessary for the driver to disengage the clutch when shifting from ratio to ratio. With the extensive number of ratios we offer it is possible to choose from over 7,000 first gear combinations in the case of a four-speed for example. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. with its dedicated underdrive ratio, determines the immediate drive ratio. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. The planet gears are driven by an encompassrng flng gear. The internal action of a LENCO is such that when the transmission is in first gear the chosen planet gear assembly provides the launch ratio. All three units shifted equal final drive ratio of 1:1. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. The 4-speed above shows how to determine drive ratios. Second gear ratio is 1.80 and third gear is a 1. By multiplying these three ratios you come up with a 2.46 first gear ratio. The middle case would also contain a 1.37 planet gear set. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. You must multiply each case's underdrive ratio in order to determine the first gear ratio. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases provide multiple underdrive ratios. In all instances you will require a LENCO reverse unit to achieve reverse movement. 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. We achieve more than two speeds by assembly of multiple cases. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio.Įach LENCO transmission is thus a two-speed and is housed in its single dedicated case. Each sun and planet gearset represents two speeds. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. ln general, all Lenco transmissions are a planetary design. Lenco offers an extensive variety of transmissions.
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