Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. The CS-2 is much easier to work on than the CS-1. I use an electric over air setup to shift my new B and J transmission. I shift it with a timed switch getting its signal from an electric shifter box so that it applies voltage for 17 sec at the shift. 1.338%Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. We happen to run synthetic AFT. The CS2 handles up to 3000 HP; CS3 and CS4 1800 HP. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. Lenco, the all time champion and undisputed leader in the drag racing transmissions. It's capacity is much stronger than the small sprag. Stay up to date with news and promotions by signing up for our monthlly newsletter. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. Watch it while someone pushes the shifter button. Reverse lever. LENCODRIVE Automatic As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. 1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. What kind of clutch you run is a big factor. Then, continue to screw air servo Out (counter-clockwise) one half turn. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. It might be less, it might be much more. Every track differs from day to day or hour to hour. Light weight ring gears (units w/27 and 32 spline shafts only). We do offer different thickness floaters for correcting the clutch pack clearance. Because the ring gears are the final gear ratio of 1:1, a six-speed planetary transmission would consist of 5-planetary sections: 5 gear set ratios (sun gears) and a sixth gear when all of the planetary gear sections are locked together forming a 1:1 ratio. On the street five-speed model the ratios start at 3.25 in first gear, 2.26 in second, 1.64 in third, 1.25 in fourth, and fifth gear is 1:1. Sight through plug hole, where you will see the outer edge of the rotary shift plate. The tallest to the right is used to shift the transmission from first to second gear. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. Too much torque and the output shaft can suffer deflection, and the whole system can start to fail in its operation as the gears move away from each other. Final drive ratio is 1:1. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. By multiplying these three ratios you come up with a 2.46 first gear ratio. All Lencodrives come with the following (less converter). On the track, however, the low 48 percent first gear should be enough to launch any powerful car hard, and the transmission's history of performance won't let anyone down. The tallest to the right is used to shift the transmission from first to second gear. Checking Shift Pressure(only on CS-1 style or center shift transmissions): To measure the shift pressure install checking lever into tower screw jam nut all the way up the tower so it's out of the way. The CS2 ,CS3, and CS4 LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. 1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. Due to the way they are designed and operate, the advantages are clear. Screw air servo in (clockwise) until you see the rotary plate start to shift, now screw air servo Out (counter-clockwise) until the rotary shift plate stops moving. Lenco's transmissions can either be manually shifted or gas shifted with CO2. lenco cs3 5 speed. The three speed is approximately 135 lbs. Do Not Over Tighten. Then start the tires spinning, now shift the front section so that you are now in high gear. Manual 2 Speed with Neutral Safety [DRIVE-2-S], Manual 3 Speed with Neutral Safety [DRIVE-3-S], Manual 4 Speed with Neutral Safety [DRIVE-4-S], Lockout Shift with Neutral Safety [DRIVE-L-S]. 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. In general, all LENCO transmissions are a planetary design. If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. Burnout's (on all LENCOS): The LENCO Gear Reducer is used as a stand-alone unit or in conjunction with our CS1 Standard Design and CS2, CS3 and CS4 New Generation transmissions in order to employ tall rear gears with the advantage of a short launch ratio. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. Lenco, the all time champion and undisputed leader in the drag racing transmissions. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. There are two different size air servos for the New Generation transmissions. Available in single o.. Lenco couplers are machined from 8620 aircraft quality steel and heat treated for for severe duty se.. Magnesium cases are used for both the CS2, CS3 and CS4. Call the Hurst Lightning Rods, a popular sight in a mid-'80s issue of Hot Rod, a road-going take on a Lenco transmission. The LENCO ST1200 is the answer for Pro Street and street/strip applications. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. The original solid steel planetary carrier was also replaced with a two-piece planetary carrier that is part steel and part aluminum. Uses 225mm clutch pack in a reverse. Each sun and planet gearset provides two speeds. Lenco Parts and Price List isavailable here. Going to high on the pressure shocks the transmission and drive-train. 1.368%Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. 2 Speed + reverser with Pro output: 18.500". In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. Screw air servo into case until it bottoms out against the jam nut. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. One variation is that the ST1200 uses budget-friendly 8620 alloy for the gears instead of the more expensive 9310 material. Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). You must multiply each case's underdrive ratio in order to determine the first gear ratio. 1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. When discs wear to .052" or less they must be replaced. Here's some fuzzy footage showing the operation. All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080. Stay up to date with news and promotions by signing up for our monthlly newsletter. I do have three .080" shims, two .017" and six .027" shims. The planet gears are driven by an encompassing ring 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. With its larger size and more teeth, it rotates faster, so it spins the output shaft faster, which in turn spins the rear wheels faster. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. 1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear. The sun gear only rotates when it is locked with the ring gear. Apply a small amount of Red (271) Locktite on the set screw. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. All Rights Reserved. Warning: Do Not over tighten set screw. Stay up to date with news and promotions by signing up for our monthlly newsletter. Each gear is engaged by pulling down on the shift lever, to activate the clutch mechanism for each gear set. The middle case would also contain a 1.37 planet gear set. 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. The second lever, and second tallest, is used for third gear. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Air or manual shift. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. 1.356% Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. Magnesium Case. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as thecrankshaft. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Before you install the transmission you must measure the clearance between the pilot bearing end of the input shaft and the rear face of the pilot bearing. Lencodrive 4 Speed. Th.. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. No alterations to the transmission, other than the external operating system itself, are required. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. Shift Patterns: All levers in forward position result in the transmission being in first gear. The lever arms also vary in length. This means that it can run for years without any maintenance and still operate smoothly. e30 m52 turbo. The total amount of gear reduction depends on the amount of housings and the overall application of the transmission. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. and control slippage. Furthermore the Lenco allows you to achieve 3,000-rpm launches at the track and 1,000-rpm take-offs from the stoplight, depending on how long you leave your foot on the clutch. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. In all instances you will require a LENCO reverse unit to achieve reverse movement. Screw the servo into the transmission case until contact is made with the shift fork pin. The internal action of a LENCO is such that when the transmission is in first gear the dedicated planet gear assembly provides the launch ratio. The Lenco provided unbreakable performance and lightening-quick gear changes, which made these clutchless wonders the tranny of choice among the ultimate door slammer crowd. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. Race prepped Hydramatic. Lenco has gone through a lot of changes in the past year, with a new owner and new location, the team at Lenco set out to redesign, revamp, and redefine the ST1200 street transmission as the new . The CS1 planetary gear size is 1". Every track differs from day to day or hour to hour. You always need to come out of the water box in high gear to prolong the life of the transmission. Remove fill plug on top the transmission case you are going to adjust. You always need to come out of the water box in high gear to prolong the life of the transmission. Screw air servo into case until it bottoms out against the jam nut. 1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 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. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. 1.256%Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. 1.50%Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. A five speed requires four cases, and a six speed requires five cases. In the example of a four speed, the case nearest the engine would The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people who have asked for a safe and affordable torque converter driven transmission. up to the CO2 configuration or vice versa. 1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio. This unique clutch is a very popular replacement for clunky V-drive dog style in-out boxes. Reverse is a small black lever. For more specific information on any of these Lenco transmissions please refer to the Tabs below, or call our tech line at(909) 673-9080. Copyright 2020, Lenco Racing. The sections are joined by a sprag clutch that restricts rotation of the sun gear to one direction. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. Gears attached to the output shaft are loosely connected.

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