The only exception is replacing the pressure plate and resurfacing the flywheel after a long period of use, and frequently changing the transmission fluid about every 400-500 miles. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. 2 Speed + reverser with Pro output: 18.500". Each case in succession. Air or lever shift. Add fluids as necessary and install fill plug. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. Think of it as manually shifting an automatic transmission. The ring gear is then pressed inside of the bearing. 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 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. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. Refining the machining process of how the gears are made and even designed resulted in more efficient gears that mesh together easier than the previous version. The arm is held into the servo piston by a set screw. 1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear. Lencodrives is a CS-2 transmission. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. You must multiply each case's underdrive ratio in order to determine the first gear ratio. Shims before and after the shifter plate assembly -. You can expand to 3 or 4 speeds by addition of additional cases. This change cut down weight substantially which added to the overall rotational mass reduction. 3/4" Gear Set. Glazed, burned and chipped discs must also be replaced immediately. Also, a hp/tq rating on a transmission does not mean it will actually hold that much. The main advantage of a lenco transmission is its simplicity. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Do Not Over Tighten. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. This is how we engage gears in a traditional manual transmission. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. This is our large sprag and unlike the small sprag doesn't have a snap ring in the outer race and has two brass thrust washers. Air servo or max-adjust shift tower and lever. Charlotte , NC. 1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. In all instances the transmission is then shifted to a 1:1 direct drive ratio by depression 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. 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. sr1200, This change reduced any chance of casting imperfections and it offered more control over the final product. The next lever is used for fourth gear and final lever for fifth. This will allow for free play in the shift system. Once installed, make sure the air servo is loose and can turn freely. Thus a 1:1 ratio is achieved. Screw the servo into the transmission case until contact is made with the shift fork pin. 1.50%Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Then start the tires spinning, now shift the front section so that you are now in high gear. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Remove fill plug on top the transmission case you are going to adjust. Warning: Do Not over tighten set screw. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. A typical CO2 shifting assembly Consists of either a small or large CO2 bottle, bottle brackets, pressure gauges, pressure adjustable shift buttons, air servo, pressure line, fittings and LENCO transmissions are a planetary design. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Uses 225mm clutch pack in a reverse. automatic, Run the air servo jam nut and o-ring up the threads on the servo. All three units shifted equal final drive ratio of 1:1. The power is passed straight through from one planetary gear set into the next gear set and the process repeats again. 1.356%Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. (OR ) C4 trans discs with inside of tips machined off, minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline, Case - cast from aluminum (original) and Magnesium, The CS1 is available with up to five speeds and offers your choice of 19 first gear ratios. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Competition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. 2 Speed with single brg and std output: 16.875". 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. Air or manual shift. For example, a three speed requires two cases. 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. 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. Every track differs from day to day or hour to hour. First you need to determine which style clutch packs you are working onsee chart. 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. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. Th.. Stay up to date with news and promotions by signing up for our monthlly newsletter. Lever or CO2 shift. 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. The arm must be free to move in all directions. the final shift, being locked to a 1:1 ratio. 1.500%Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring 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. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. I purchased the trans disassembled and do not have the shim configuration shown in the drawing. lenco cs3 5 speed. Remove fill plug on top the transmission case you are going to adjust. The sun gear only rotates when it is locked with the ring gear. The Lencodrive is available with your choice of all popular bellhousing patterns as well as any starter pocket positioning. Final drive ratio is 1:1. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Unlike a traditional manual transmission with its singe shifter, planetary transmissions have multiple levers which are used to shift the transmission. gearset/ratio and when connected to additional cases multiple ratios are realized. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. I use an electric over air setup to shift my new B and J transmission. Each planetary gear set is in its own housing and carries a higher ratio. Engineered for 1200 HP. View the whole process and start at the beginning. The truck runs a big-block Chevy that makes 1,100 horsepower on pump gas and lots of nitrous oxide. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. Porsche 911-06 side shift transmission for 914 4 or 6. To address this, Lenco added more gear ratios, particularly ratios which were half-steps to fill in the gaps so that a customer could fine tune their system without the pesky large leap that used to happen. No further adjustments are necessary as there is ample reserve travel in the servo. 8620 is a premium quality material that will provide excellent service for 1200 HP hot rods. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. The version 2 of the ST1200 transmission, builds upon that great design with an all-aluminum billet CNC casing, double O-ring seals, hardened anodized finish, and a larger choice of gear ratios for perfect fine tuning of gear ratios. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. The arm is held into the servo piston by a set screw. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Jeff Turner's street driven 600hp on motor/800hp on a 200-shot of nitrous "race for money" license platted 1966 Pontiac GTO took us for a spin. necessary hardware. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. If you want to go straight to the action, skip to around 2:20. It is bolted to the end of the transmission with a splined output shaft which will await the driveshaft yoke. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. When the installed lever is loose that section is in low and when the lever is tight the sections in high. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. 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. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. Please click here for CS3 Timing Chart (.pdf). 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. Run the air servo jam nut and o-ring up the threads on the servo. Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. It also allowed Lenco to shave as much weight as possible from the finished part. 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. Air shifted LENCOS come pre adjusted from the factory. Although the initial cost is more than a well-built TH400, the longer durability and low-maintenance cost of the Lenco will pay for itself in the long run. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Clutchless shifting is the practice of changing or shifting your gear without touching the left bar lever. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. 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. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. If the shift pressure is set to your application lock the jam nut your finished, if not you then need to add shim to raise pressure or subtract shim to reduce pressure. The 1 1/4 is the best and used in Top Alcohol and Pro Mod. Pistol Grip Manual Shifter. 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. 1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear. specific design will suit you best. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. Thus a 1:1 ratio is achieved. The sun gear is the center of the mechanism's universe. Aside from manufacturing benefits, it also gives customers a finished piece that looks more like jewelry than an automotive part. The shifting process removes multiplication factors and subsequently results in all gear-sets, after Stay up to date with news and promotions by signing up for our monthlly newsletter. This action compresses an internal clutch pack which results in a final driveratio of 1:1. This in-car shot video shows a Mopar powered engine combined with the clutch-less Lenco Transmission that produces over 850 real Mopar horsepower!!! In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio. The middle case would also contain a 1.37 planet gear set. 1.25%(Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Equipped with a Lenco ST1200 5-speed transmission, Jeff regularly drives his car on the streets around his home in Oceanside, CA. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. A first-to-fourth skip-shift solenoid is used on the transmission to help increase fuel economy. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft. Stay up to date with news and promotions by signing up for our monthlly newsletter. The shift lever is almost the same height as the standard 5th gear lever. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Multiple speed transmissions use multiplication of gears to create different speeds. We acheive more than two speeds by combining multiple cases. Call the Hurst Lightning Rods, a popular sight in a mid-'80s issue of Hot Rod, a road-going take on a Lenco 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. Then, continue to screw air servo Out (counter-clockwise) one half turn. The rear axle is a Dana 44 with independent half-shafts. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . The original ST1200 came with a cast aluminum case, gasket seals, and a range of selectable gear ratios. Air servos are specific to the type of Lenco you run so be sure to pick the correct one from the drop down menu. As an example, this tranny with a set of 4.30:1 rear axle gears, coupled to 32-inch-tall Mickey Thompson tires should allow any Pro Street Chevy to cruise on the highway, averaging 60 mph at slightly above 2,800 rpms. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Easy to use and necessary for fine tuning When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Second gear ratio is 1.80 and third gear is a 1.31 ratio. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. As with all LENCO transmissions a separate reverse unit is employed. 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 CS1 will control up to 3000 HP. The Lencodrive comes as a 2 speed with reverse. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components. Tags: The rear case a 1.31 ratio gearset. A LENCO launch ratio is determined by the sun and planet gear ratio. What this means in practice is you use the clutch pedal to engage first and reverse . You will need to add a LENCO reverse unit in order to back up. Additionally, the Lencodrive's main valve body is machined from billet components and is not the typically modified OEM Detroit component. Typically the CS-1 and CS-3 run the 2.50" piston air servo (150 psi) and the CS-2 and Lenco drive runs the 3.00" piston (250 psi). To add more speeds to a planetary transmission you add more sections. LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. 1.22% (1.219) - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. 1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. This means that it can run for years without any maintenance and still operate smoothly. The ST1200 gives you the advantage of Lenco brute strengthat a lesser price than our full race units. The arm is held into the servo piston by a set screw. Magnesium Case. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set Light weight components. It is also 2-lbs lighter for lower rotational mass which translates to quicker acceleration. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. 150 is the usual middle starting point. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. Reverse lever. Planetary transmissions, like Lenco, eliminate this inherent design weakness by utilizing planetary gears. The choice is yours. The CS2 ,CS3, and CS4 LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 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. Final drive ratio is 1:1. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. Copyright 2020, Lenco Racing. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. Run the air servo jam nut and o-ring up the threads on the servo. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. You must multiply each cases underdrive ratio in order to determine the first gear ratio. The simplicity also makes them easy to repair if something goes wrong . 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. This is first gear. Warning: Do Not over tighten set screw. Lenco Racing, the all time champion and undisputed leader in the drag racing. Purpose designed and produced for drag, ski and river boat requirements. There are a lot of variables. This will allow for free play in the shift system. The Lencodrive comes as a 2 speed with reverse. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 9. The dual clutch manual transmission is simply fast. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Here's some fuzzy footage showing the operation. Each sun and planet gearset represents two speeds. 1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. This is what comes standard in most new LENCO transmissions. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. If you want to go straight to the action, skip to around 2:20. Screw the servo into the transmission case until contact is made with the shift fork pin. 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. Boat Transmissions and Boat Clutches Casings are anodized and set in a mechanical press. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 5.6K views, 84 likes, 1 loves, 13 comments, 17 shares, Facebook Watch Videos from Lenco Racing Transmissions, Inc.: David answers a few FAQ on CS-1 thru CS-4 Transmissions The Lenco Racing Lencodrive 4Speed Automatic Transmission represents our response to people wh.. At the time of your inital order, you may add additional sections to your Lencodrive Automatic Lenco.. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Since internal combustion engines have a short torque band, we utilize transmissions to change the speed that the wheels spin by either using larger or shorter gear ratios. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. See(input diagram). Although there have been many attempts to create similar shifters for stock-type transmissions, Chevy enthusiasts have long aspired to duplicate the multi-lever design of the Lenco for their hot street machines. Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. 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. Then start the tires spinning, now shift the front section so that you are now in high gear. All levers in forward position result in the transmission being in first 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. The planet gears are driven by an encompassing ring gear. The rear case a 1.31 ratio gearset. I've made provision, so that shift lever can be moved to the back of the trans quite easily.