The air servo is attached to a rotary shift plate by an adjustable arm which is pre-set by the factory and should NOT be changed. Lencodrives is a CS-2 transmission. The original solid steel planetary carrier was also replaced with a two-piece planetary carrier that is part steel and part aluminum. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Recommended for cars making up to 1200 HP the ST1200 is pure LENCO through and through. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. The Lencodrive is pure Lenco through-and-through with the same gearset components as our CS2. Every track differs from day to day or hour to hour. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. 1.405%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. Then, continue to screw air servo Out (counter-clockwise) one half turn. INSTALLATION 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. The second lever, and second tallest, is used for third gear. It was . 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. This is an in-car shot video of Mike drag racing his 73 Duster using a clutch-less Lenco Transmission. and anodized for corrosion and galling protection. The gearset in the third case alone, 1.31:1, determines the third gear ratio. The only difference is that in an automatic, the transmission fluid moves internal valves to close the clutch pack. As with all LENCO transmissions a separate reverse unit is employed. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. Skilled drivers can perform a clutchless shift without hurting their transmission, but it does take a little bit of a learning curve to get there. Screw air servo into case until it bottoms out against the jam nut. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. Simply put, once the transmission is in gear, the power runs through a set of planetary gears. What does this mean, you wonder? Throwout bearing collar (4 & 5-speed only). Please call for ordering or technical information. CS2, CS3, CS4 & Lencodrive or offset shift transmissions: bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. The shifting process removes multiplication factors and subsequently results in all gear-sets, after 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. Once determined, these gear configurations are assembled in their planetary carriers. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. It is bolted to the end of the transmission with a splined output shaft which will await the driveshaft yoke. Remember that each separate case contains it own Lenco Drag race car. View the whole process and start at the beginning. The rear case a 1.31 ratio gearset. 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. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. 5 likes, 0 comments - Dale's Transmission (@dalesa1transmission) on Instagram: "Weird Transmission Wednesday The Lenco Lenco is not the only manufacturer of these types ." Dale's Transmission on Instagram: "Weird Transmission Wednesday The Lenco Lenco is not the only manufacturer of these types of transmissions, but it is . 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. Lenco Transmissions utilize several different styles of clutch discs and depending of which style lenco you have you will also find different clutch counts in each case. 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, R577980 Raybestos Gen2 (Blue) lencodrive, Hurst's inspiration for the Lightning Rods was the Lenco transmission (above) used in drag racing in those years, notably in the NHRA Pro Stock category. The arm must be free to move in all directions. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. I do have three .080" shims, two .017" and six .027" shims. The second lever, and second tallest, is used for third gear. 1.378%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. It also allowed Lenco to shave as much weight as possible from the finished part. Or maybe simply a T56 magnum is all you need. Our sister publication is attempting to build an 8-second quarter-mile, '68 Chevy pickup which will also embark on a 450-plus mile trek from Los Angeles to Phoenix without any other changes. All transmissions, once assembled, have to be installed in a car. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the LENCODRIVE is 100% LENCO and will handle 2500 HP with ease. Please call for ordering or technical information. Reverse is a small black lever. Shifters and lockouts can be either style. Additionally, the Lencodrive's main valve body is machined from billet components and is not the typically modified OEM Detroit component. For additional information about Lenco products please email us here, or call us at (909) 673-9080. Thus a 1:1 ratio is achieved. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. The Lencodrive does not require a containment blanket unless you use a supercharger or alternative fuels. The CS-2 is much easier to work on than the CS-1. The sections are joined by a sprag clutch that restricts rotation of the sun gear to one direction. In general, all LENCO transmissions are a planetary design. 3. 1.368%Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. The sun gear only rotates when it is locked with the ring gear. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. of the adjustable shift tower plunger. Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. The Lencodrive will accept virtually any manufacturer's torque converter. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. A BorgWarner T56 six-speed transmission was used in the Viper; automatics have never been available. Pistol Grip Manual Shifter. The ST1200 transmission is pure Lenco through and through and is ideally suited for nitrous, blown, injected and carbureted engines producing up to 1200 HP and 900 lb ft of torque. Air or lever shift. with its dedicated underdrive ratio, determines the immediate drive ratio. Call the Hurst Lightning Rods, a popular sight in a mid-'80s issue of Hot Rod, a road-going take on a Lenco transmission. Air or Lever Shift. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. The three speed is approximately 135 lbs. By multiplying these three ratios you come up with a 2.46 first gear ratio. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. 1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. This is an in-car shot video of Mike drag. 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. 1.46%Uses 22 tooth planet gears, a 37 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. Th.. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. This pressure adjustability gives you considerable control when The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. I believe the main difference between running ATF and 30wt engine oil is the speed in which the Lenco clutches can close up at the shift. You must multiply each case's underdrive ratio in order to determine the first gear ratio. The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Once installed, make sure the air servo is loose and can turn freely. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. Every track differs from day to day or hour to hour. All LENCO transmissions can be shifted with levers or a CO2 system. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. This will allow for free play in the shift system. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 4 speed. for all your racing needs, LENCO transmissions are a planetary design. When the installed lever is loose that section is in low and when the lever is tight the sections in high. New and Used Parts Copyright 2020, Lenco Racing. Magnesium Case. With a simple shift pressure adjustment you can easily compensate. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the. Tags: street transmission, 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. 1.378% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. All levers in forward position result in the transmission being in first gear. 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. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. gearset/ratio and when connected to additional cases multiple ratios are realized. All Rights Reserved. CS-1 style or center shift transmissions: As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. 3 Speed + reverser with Pro output: 25.000". The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. There is also a blue disc and a tan disc both of these styles come in one size. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Reverse is handled by a reverser section that is attached to the rear of the transmission. Shift with either our patentedmulti lever system or with the optional, more compact CO2 setup. the shift pressure to maintain desired wheel speed and traction. 1.280%Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. Despite its reputation among racers and its many uses today, which include everything from boats to alcohol dragsters, many enthusiasts have not caught on to the fact that there IS a street version available. 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. Its used to force the gear set to make ratio by preventingthe sun gear from rotating in one direction. The middle case would also contain a 1.37 planet gear set. All Rights Reserved. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. The arm must be free to move in all directions. 1.22%Uses 38 tooth planet gears, a 22 tooth sun gear and a 98 tooth ring gear. Think of it as manually shifting an automatic transmission. Over the years, there have been many in-car-cameras showing Pro Stock drivers grabbing and shifting the trademark five levers as they power their vehicles toward the finish line. Once engaged, the gears are shifted without a clutch. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. This is not possible with a traditional cluster gear transmission. 4-Speed $9,830. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. 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. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. 3 Speed with single brg and std output: 23.375". The CS2 ,CS3, and CS4 LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. The air servo is attached to a rotary shift plate by an adjustable arm which is pre-set by the factory and should NOT be changed. There are a variety of both manual and CO2 servo tower designs. (2) it is easier to work on the bruno/lenco . If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. It has a selected gear ratio, and is the first speed of the transmission that is translated to the output shaft that drives the wheels. Engineered for 1200 HP. The planet gears are driven by an encompassrng flng gear. Air or lever shift. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Also, a hp/tq rating on a transmission does not mean it will actually hold that much. Apply a small amount of Red (271) Locktite on the set screw. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. Since the 30 wt oil is thicker it takes a . 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. So, a transmission may have a first gear ratio of 2.47, a second gear ratio of 1.80, a third of 1.31, as the transmission works its way down to its final drive ratio of 1:1 where the output shaft that drives the wheels is spinning as fast as the input shaft which is attached to the motor. Stay up to date with news and promotions by signing up for our monthlly newsletter. The lever arms also vary in length. Lenco Parts and Price List isavailable here. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Building a Lenco ST1200 starts with constructing the soul of the transmission: assembling its planetary gear sets. 1.41%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. If needed you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired. The ST-1200 is not one of their most popular transmissions (they still sell more racing models), but it is the answer to many problems facing high-horsepower street cars and trucks that need a compromise between a stout race and street transmission. Exclusively V.A.R. Planetary gear sets have two speeds. The ST1200 gives you the advantage of Lenco brute strengthat a lesser price than our full race units. 1. jody - even though i don't run a lencodrive and i have 2 bruno/lencos, i believe i can highlite some differences. 150 is the usual middle starting point. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodriveis 100% Lenco. You always need to come out of the water box in high gear to prolong the life of the transmission. Gear Ratio Reducer We do offer different thickness floaters for correcting the clutch pack clearance. Polishing the shift fork helps a lot for consistent shifts. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Light weight ring gears (units w/27 and 32 spline shafts only). Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. Stay up to date with news and promotions by signing up for our monthlly newsletter. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. Magnesium cases are used for both the CS2, CS3 and CS4. Lever or CO2 shift. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. There are a variety of both manual and CO2 servo tower designs. The LENCODRIVE is the automatic answer for people who prefer torque converter/automatic transmission applications. This transmission can be used to drive your hot rod to work Monday through Friday and then to the dragstrip and the winner's circle on weekends. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. . When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Assemble next section on to case and bolt tight. 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. This synchronizing gear is pushed onto the teeth of one of the two drive gears that it sits in-between, matching its speed and locking it into place. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. Watch it while someone pushes the shifter button. ST1200 Street Strip Also known as a 'crash' gearbox for the noise it can make with a mis-timed shift, the non-synchromesh transmission is now only usually found in some trucks. .. All Lenco coupler clamps are machined from 7075 aircraft grade aluminum. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Posted 6 days ago. His dial-in time is 10.60 and his ET for this race was a 10.61. All three units shifted equal final drive ratio of 1:1. To add more speeds to a planetary transmission you add more sections. Reverse lever. All shifting is done with the engine's clutch engaged. transmissions, It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Each sun and planet gearset represents two speeds. - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. Upshifting is very commonly done this way, but you can also do it while downshifting. 1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. They only serve to transfer the power of the ring gear to the planetary and to rotate around the sun gear if the sun gear is held stationary by the sprag clutch. Shift Patterns: 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. Do Not Over Tighten. Copyright 2020, Lenco Racing. Each sun and planet gearset provides two speeds. 1.338%Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. Air servos are specific to the type of Lenco you run so be sure to pick the correct one from the drop down menu. Copyright 2020, Lenco Racing. The Lenco assembly drawing shows two .030" shims on the front side of the plate and one .180" shim on the side where the pressure plate is. CS1 Standard Design It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. Instead of molten aluminum being poured into a mold cavity making a casting, Lenco makes the new transmission casings out of a solid block of aluminum that is cut down by endmills. The first speed is when the ring gear is rotating while the sun gear is stationary. The original transmission was and is still a bulletproof transmission for the street/strip crowd. 1.50%Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set 1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear. See(input diagram). To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. The downside of this setup is that the shafts are only supported on their ends, so the shaft can bend with torque. Stay up to date with news and promotions by signing up for our monthlly newsletter. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. Ourblue,greenandtandisc are supplied new at approximately .058"- .061" thickness. Competition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. I've made provision, so that shift lever can be moved to the back of the trans quite easily. This information leads to a selection of sun gears with associating ratios, ring gears, and properly sized planet gears that mate the sun gears to their ring gears.
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