We recommend that you discuss your application with our technical representatives and follow their suggestions on which 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. I've made provision, so that shift lever can be moved to the back of the trans quite easily. Sight through plug hole, where you will see the outer edge of the rotary shift plate. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. They opted to use the Lenco ST-1200 as it would be a great opportunity to show the tranny's durability and strength by running the truck on both the track and street. CS2, CS3, CS4 & Lencodrive or offset shift transmissions: 1.368%Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. This is an in-car shot video of Mike drag. Choice of standard or new generation reverses. When locked, the gear's ratio is translated to the output shaft as the gear and the output shaft are now fixed. When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). Engineered for 1200 HP. 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. We happen to run synthetic AFT. Clutchless Shifting: What It Is & How to Do It Safely - Horsepowerful Magnesium Case. By multiplying thesethree ratios you come up with a 2.46 first gear ratio. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Shift with either our patented. This is not possible with a traditional cluster gear transmission. Air shifted LENCOS come pre adjusted from the factory. No further adjustments are necessary as there is ample reserve travel in the servo. A five speed requires four cases, and a six speed requires five cases. RATIO CHART 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 1 position forward selects 1st gear, then 2nd gear is selected by . Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. specific design will suit you best. It was . Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. 3 Speed + reverser with Pro output: 25.000". Competition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. Low drag (angluar contact and needle bearings). Stay up to date with news and promotions by signing up for our monthlly newsletter. Shift with either our patentedmulti lever system or with the optional, more compact CO2 setup. In general, all LENCO transmissions are a planetary design. View the whole process and start at the beginning. Charlotte , NC. Adding progressively different ratio independent gear housings behind each other allows Lenco to create two-speed, four-speed, five-speed, and even six-speed transmissions. Adjustment: Lenco Parts and Price List isavailable here. We acheive more than two speeds by combining multiple cases. Air servos or max-adjust shift towers. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. ST1200 4 Speed with Reverse and Shifter | Lenco Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Tags: In all instances you will require a LENCO reverse unit to achieve reverse movement. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. Think of it as manually shifting an automatic transmission. Final drive ratio is 1:1. The downside of this setup is that the shafts are only supported on their ends, so the shaft can bend with torque. With a simple shift pressure adjustment you can easily compensate 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) They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. Thus a 1:1 ratio is achieved. The arm must be free to move in all directions. Lenco's transmissions can either be manually shifted or gas shifted with CO2. Screw air servo into case until it bottoms out against the jam nut. If, however, the track is loose from 300 through 500 you can soften This is what comes standard in most new LENCO transmissions. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed case. Lenco Racing Releases New Billet Street Transmission - MotorTrend What this means in practice is you use the clutch pedal to engage first and reverse . 4 speed. Do Not Over Tighten. EASY SHIFTING with David Sumek | David answers a few FAQ on - Facebook transmission, Lenco, the all time champion and undisputed leader in the drag racing transmissions. Since the 30 wt oil is thicker it takes a . Material Gears. Changing gears and setting it up is the same for the CS-2 and the Lencodrive. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. All three units shifted equal final drive ratio of 1:1. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. 1.44%Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Uses 225mm clutch pack in a reverse. 1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Now taking all the lash out by lifting up on the clutch housing (outer housing) and press down on the pressure plate then measure the distance between the top of the pressure and the bottom of the snap ring groove of the clutch housing, This is your clutch pack clearance. 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. Section upon section are bolted together until the transmission takes shape, growing taller than the technician building it. The sun gear only rotates when it is locked with the ring gear. Other sections are added in a similar way: parts are pressed into casings, gears are added, and sections are bolted together in a repetitious manner. How is this done? His dial-in time is 10.60 and his ET for this race was a 10.61. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. 1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Air or lever shift. 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. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. This is a 1971-72 901 transmission converted for use as a side shift 914 gearbox. Lenco Racing | The World's Best Racing Transmissions Lenco downshifting - YouTube By multiplying these three ratios you come up with a 2.46 first gear ratio. 1.68%Uses 15 tooth planet gears, a 62 tooth sun gear and 91 tooth ring gear. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. 2 Speed with single brg and std output: 16.875". When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. transmissions, The second lever, and second tallest, is used for third gear. After inserting arm into the air servo piston boss, run set screw in until you can no longer remove the arm from the piston boss. direct drive - with reverser / Cannon to control clutch arm position, Screw the servo into the transmission case until contact is made with the shift fork pin. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. After inserting arm into the air servo piston boss, run set screw in until you can no longer remove the arm from the piston boss. The middle case would also contain a 1.37 planet gear set. You can add additional cases and gearsets that will result in 3 or 4 speeds. Gear Ratio Reducer at a lesser price than our full race units. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. and control slippage. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. 4-Speed $9,830. The CS-2 is much easier to work on than the CS-1. I purchased the trans disassembled and do not have the shim configuration shown in the drawing. Stay up to date with news and promotions by signing up for our monthlly newsletter. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. 1.500%Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear. All cases are magnesium. Choice of ratio. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. See(input diagram). Choice of output shaft length and spline. Shown with our boat bellhousing. 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. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. 1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. The choice is yours. The hard-anodized finish is meant to thrive in that environment, requiring no more than a quick wipe down with a damp rag, whereas the bare aluminum transmission would need more work to get it sparkling again. The Lencodrive comes as a 2 speed with reverse. To demonstrate the inner workings of the Lenco ST-1200 transmission, we followed along as one was being assembled for use in Truckin' Magazine's World's Fastest Street Legal Pickup. Technical Support - Lenco Racing Transmissions No alterations to the transmission, other than the external operating system itself, are required. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. This is what comes standard in most new LENCO transmissions. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. Every track differs from day to day or hour to hour. All levers in forward position result in the transmission being in first gear. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. The original ST1200 came with a cast aluminum case, gasket seals, and a range of selectable gear ratios. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. Lenco Street Transmissions - Super Chevy Magazine - MotorTrend The second lever, and second tallest, is used for third gear. 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. The planet gears are driven by an encompassrng flng gear. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. 1.356%Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. Lencodrive 3 Speed. LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. Planetary gear sets have two speeds. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. 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. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. 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.
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