Stay up to date with news and promotions by signing up for our monthlly newsletter. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. LENCODRIVE Automatic 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. All Rights Reserved. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The main advantage of a lenco transmission is its simplicity. The planet gears are driven by an encompassing ring gear. All transmissions are the sum of their parts. The sections are joined by a sprag clutch that restricts rotation of the sun gear to one direction. There are a lot of variables. The Lencodrive does not require a containment blanket unless you use a supercharger or alternative fuels. 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. Reverse is handled by a reverser section that is attached to the rear of the transmission. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. Clutchless Transmission - Liberty's Gears 1.48%Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. 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. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. This will allow for free play in the shift system. Lenco Transmission Overview A five speed requires four cases, and a six speed requires five cases. Shift with either our patented. Copyright 2020, Lenco Racing. 1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. This is a 1971-72 901 transmission converted for use as a side shift 914 gearbox. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. Technical Support - Lenco Racing Transmissions Lenco Racing Transmissions have brought more of their racing technology to the street crowd with a new transmission that is lighter, engineered with new technology, has more efficient components, and has less rotating mass than the previous unit. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. 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. Stay up to date with news and promotions by signing up for our monthlly newsletter. Air or manual shift. By multiplying these three ratios you come up with a 2.46 first gear ratio. Final drive ratio is 1:1. - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. There are two different size air servos for the New Generation transmissions.The small air servo (2.5"piston diameter) and the large air servo(3"piston diameter) for the CS-2 large case transmission and Lencodrives. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 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. 9310 steel would be used in Pro Stock, Pro Mod and other similar applications where substantially more HP, torque and tire plant is generated. The original transmission was and is still a bulletproof transmission for the street/strip crowd. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. 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. Shifters and lockouts can be either style. The original ST1200 came with a cast aluminum case, gasket seals, and a range of selectable gear ratios. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. custom vertical gate shifter, push button downshifting. 1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. Assemble next section on to case and bolt tight. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. With a simple shift pressure adjustment you can easily compensate 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. Three planetary gears rotate around the sun gear like planets traveling in their orbit. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. (1) in the bruno/lenco the fluids are seperate - which gives you options of running different fluid types and no chance of breaking the lenco side and mixing it into the converter. I use an electric over air setup to shift my new B and J transmission. View the whole process and start at the beginning. Purpose designed and produced for drag, ski and river boat requirements. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. The sun gear is the center of the mechanism's universe. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Lenco Parts and Price List isavailable here. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. In general, all LENCO transmissions are a planetary design. 1. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. This is what comes standard in most new LENCO transmissions. We acheive more than two speeds by combining multiple cases. This is what comes standard in most new LENCO transmissions. All ST1200 Street units now come with low drag bearings and a billet case. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Each sun and planet gearset represents two speeds. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Choice of output shaft length and spline. The ST1200 comes with aluminum cases instead of the magnesium style race units. 1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The next lever is used for fourth gear and final lever for fifth. The middle case would also contain a 1.37 planet gear set. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components. Exclusively V.A.R. You may choose any conventional input shaft spline. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. 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. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. The ring gear is then pressed inside of the bearing. This in-car shot video shows a Mopar powered engine combined with the clutch-less Lenco Transmission that produces over 850 real Mopar horsepower!!! 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. A G-force or Liberty face plated 4 speed may be what you want. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Attach air lines and your race ready. Warning: Do Not over tighten set screw. - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. RATIO CHART 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. If you have a car that you drive to the store on Monday and to the drag strip on Sunday, the only hard question that you have to ask yourself is: Do you prefer anodized or clear? I've made provision, so that shift lever can be moved to the back of the trans quite easily. 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 servo or max-adjust shift tower and lever. transmissions, In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. Run the air servo jam nut and o-ring up the threads on the servo. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. The final section is the reverser. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. You could not make small adjustments, so owners had to be selective in their transmission and rearend gear choices. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Engineered for 1200 HP. 3 Speed with single brg and std output: 23.375". 5-Speed $10,660. 1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. 4-Speed $9,830. Available in single o.. Lenco couplers are machined from 8620 aircraft quality steel and heat treated for for severe duty se.. Charlotte , NC. Polishing the shift fork helps a lot for consistent shifts. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Since the 30 wt oil is thicker it takes a . No alterations to the transmission, other than the external operating system itself, are required. lencodrive, Lenco burnout procedures | InsideTopAlcohol The tallest to the right is used to shift the transmission from first to second gear. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. If needed you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired. necessary hardware. The next lever is used for fourth gear and final lever for fifth. 1.22% (1.219) - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases provide multiple underdrive ratios. A LENCO launch ratio is determined by the sun and planet gear ratio. The middle case would also contain a 1.37 planet gear set. All Rights Reserved. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. Copyright 2020, Lenco Racing. Remove fill plug on top the transmission case you are going to adjust. Th.. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. All transmissions work by using gear ratios to transfer power to the rear wheels. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 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. - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. The first speed is when the ring gear is rotating while the sun gear is stationary. Gear Ratio Reducer Uses 225mm clutch pack in a reverse. Lencodrive 3 Speed and Reverse | Lenco 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. We do offer different thickness floaters for correcting the clutch pack clearance. As with the CS1 Standard Design, the New Generation CS2, CS3 and CS4 can be shifted by lever or our CO2 system. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. Lenco transmissions were first made popular in the early '70s when NHRA Pro Stockers needed a gearbox that was up to the task of 9-second elapsed times. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. for all your racing needs, LENCO transmissions are a planetary design. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. Low drag (angluar contact and needle bearings). We achieve more than two speeds by assembly of multiple cases. 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. Going to high on the pressure shocks the transmission and drive-train. Do Not Over Tighten. 3 speed. All Rights Reserved. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. Shift pressure is adjustable, whether it be for one case, all cases or anindividual case in a multiple case configuration. To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. It might be less, it might be much more. His dial-in time is 10.60 and his ET for this race was a 10.61. 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. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. There are a variety of both manual and CO2 servo tower designs. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Copyright 2020, Lenco Racing. Copyright 2020, Lenco Racing. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. the shift pressure to maintain desired wheel speed and traction. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Lenco Air Shift Servo CS-1/CS-2/CS-3 - RBS Superchargers When other gears are selected the synchronizer is placed back in the center of the gear and another synchronizer is activated, repeating the same sliding, matching, and locking maneuver to another set of drive gears. The three speed is approximately 135 lbs. Every track differs from day to day or hour to hour. This pressure adjustability gives you considerable control when 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 300M Input/Cluster Shafts. 1.35%Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 tooth ring gear. This can cause tire shake. For example, a three speed requires two cases. Jeff says that he loves the transmission and "the only thing different [from driving a traditional gearbox] is that there is no engine braking". 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. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. INSTALLATION How To Shift A Lenco Transmission ? - Answerlic Screw air servo into case until it bottoms out against the jam nut. 3. 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. This change reduced any chance of casting imperfections and it offered more control over the final product. For additional information about Lenco products please email us here, or call us at (909) 673-9080. This is first gear. As with all LENCO transmissions a separate reverse unit is employed. 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. You must multiply each cases underdrive ratio in order to determine the first gear ratio. What kind of clutch you run is a big factor. 9. The arm must be free to move in all directions. 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. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). It is sometimes necessary to have an extra floater disc to reach the desired clutch pack clearance and normally the extra floater would go next to the planet case. 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. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. ST1200 4 Speed with Reverse and Shifter | Lenco Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). The CS2 ,CS3, and CS4 Each sun and planet gearset provides two speeds. multi lever system or with the optional, more compact CO2 setup. 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. This will allow for free play in the shift system. First gear is the furthest lever from the driver with higher gears being the nearest levers. It makes a powerful and unique street transmission that offers Hot Rodders a gearbox that can handle up to 1200 horsepower reliably, while offering versatility to seamlessly change between an easy drive on the streets to racing hard on the weekend. 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. Section upon section are bolted together until the transmission takes shape, growing taller than the technician building it. 1.338%Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. This is a very extreme duty sprag assembly. The rear case a 1.31 ratio gearset. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. the final shift, being locked to a 1:1 ratio. EASY SHIFTING with David Sumek | David answers a few FAQ on - Facebook I've mounted it where It's most comfortable for me. Light weight ring gears (units w/27 and 32 spline shafts only). With a simple shift pressure adjustment you can easily compensate. Material Gears. In general, all LENCO transmissions are a planetary design. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. 1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. By multiplying thesethree ratios you come up with a 2.46 first gear ratio. Each case in succession. Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. Stay up to date with news and promotions by signing up for our monthlly newsletter. Assemble next section on to case and bolt tight. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. We acheive more than two speeds by combining multiple cases. 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. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. at a lesser price than our full race units. One variation is that the ST1200 uses budget-friendly 8620 alloy for the gears instead of the more expensive 9310 material. Lenco Racing Releases New Billet Street Transmission - MotorTrend Enough to make the run and turnoff before it releases. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. Lenco Racing | The World's Best Racing Transmissions 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. If a sun gear to ring gear has a ratio of 1.44, then the intermediate shaft that is attached to the planetary carrier is spinning at a 1.44 reduction in relation to the input shaft. First, the top loader has three levers on the drivers side of the case, 1 is for 1st and 2nd gear, the next is for reverse, and the third is for 3rd and 4th gear. Unfortunately, we no longer sale small Sprags do to the ever increasing horse power produced with today's motors. Lencodrive 4 Speed. Final drive ratio is 1:1. Gary Sumek of Lenco mentioned that they have been producing a five-speed street version for a few years. Lenco Racing, the all time champion and undisputed leader in the drag racing. 1.297%Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear. Air or lever shift. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. The position of the shift lever is relative to the application. 1.378%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. 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. CS-1 style or center shift transmissions: Then start the tires spinning, now shift the front section so that you are now in high gear. It was . Apply a small amount of Red (271) Locktite on the set screw. These four gears (sun gear and three planet gears) sit in a planetary carrier that holds them together as a unit. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodriveis 100% Lenco. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. In all instances the transmission is then shifted to a 1:1 direct drive ratio by depression Stay up to date with news and promotions by signing up for our monthlly newsletter. e30 m52 turbo. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. 1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. The tallest to the right is used to shift the transmission from first to second gear. These are the 5 weirdest transmissions ever sold | Driving The arm must be free to move in all directions. Lencodrive 3 Speed. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. Gear ratios are selected using a mathematical calculation that considers both the number of speeds required, horsepower of the car, and final rearend drive ratio. 150 is the usual middle starting point. If you already have a ST1200, you can upgrade your transmission with the new parts, ratios, and even new casing as all of the new upgraded components are compatible with the older units.