A BorgWarner T56 six-speed transmission was used in the Viper; automatics have never been available. There are a variety of both manual and CO2 servo tower designs. Stay up to date with news and promotions by signing up for our monthlly newsletter. transmission, The gearset in the third case alone, 1.31:1, determines the third gear ratio. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 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. Copyright 2020, Lenco Racing. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. Lenco Parts and Price List isavailable here. See(input diagram). 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 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. Lenco, the all time champion and undisputed leader in the drag racing transmissions. What does this mean, you wonder? Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. The 1 1/4 is the best and used in Top Alcohol and Pro Mod. The downside of this setup is that the shafts are only supported on their ends, so the shaft can bend with torque. 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. 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 final shift, being locked to a 1:1 ratio. This is first gear. 1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 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. When the installed lever is loose that section is in low and when the lever is tight the sections in high. The second lever, and second tallest, is used for third gear. There are a variety of both manual and CO2 servo tower designs. 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. In general, all LENCO transmissions are a planetary design. Boat Transmissions and Boat Clutches
Enough to make the run and turnoff before it releases. Going to high on the pressure shocks the transmission and drive-train. The next lever is used for fourth gear and final lever for fifth. Lenco's transmissions can either be manually shifted or gas shifted with CO2. for all your racing needs, LENCO transmissions are a planetary design. 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 sun gear from rotating in one direction. Changing gears and setting it up is the same for the CS-2 and the Lencodrive. fine tuning your available power application to specific track conditions. The gearset in the third case alone, 1.31:1, determines the third gear ratio. 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. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 3. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Reverse lever. Attach air lines and your race ready. The Lencodrive comes as a 2 speed with reverse. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. The arm is held into the servo piston by a set screw. of the adjustable shift tower plunger. You always need to come out of the water box in high gear to prolong the life of the transmission. By multiplying thesethree ratios you come up with a 2.46 first gear ratio. The Lencodrive will accept virtually any manufacturer's torque converter. The second lever, and second tallest, is used for third gear. INSTALLATION All Rights Reserved. View the whole process and start at the beginning. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. Jeff says that it took him about two weeks to get used to the multi-lever shifter. Thus a 1:1 ratio is achieved. Planetary gear sets have two speeds. By multiplying these three ratios you come up with a 2.46 first gear ratio. Three planetary gears rotate around the sun gear like planets traveling in their orbit. Porsche 911-06 side shift transmission for 914 4 or 6. Air servo or max-adjust shift tower and lever. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. Shift with either our patented multi lever system or with the . It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. No further adjustments are necessary as there is ample reserve travel in the servo. It is bolted to the end of the transmission with a splined output shaft which will await the driveshaft yoke. 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. The Lencodrive comes as a 2 speed with reverse. Air or lever shift. All levers in forward position result in the transmission being in first gear. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. By multiplying these three ratios you come up with a 2.46 first gear ratio. and control slippage. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. Jeff says that he loves the transmission and "the only thing different [from driving a traditional gearbox] is that there is no engine braking". 1.73%Uses 14 tooth planet gears, a 76 tooth sun gear and 104 tooth ring gear. The result is LENCO quality and durability at a reasonable "Street Machine" price. Each LENCO transmission is thus a two-speed and is housed in its single dedicated case. 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. The tallest to the right is used to shift the transmission from first to second gear. Add fluids as necessary and install fill plug. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. Purpose designed and produced for drag, ski and river boat requirements. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Please call for ordering or technical information. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. 1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. 1.25%(Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. 1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear. 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. What this means in practice is you use the clutch pedal to engage first and reverse . The rear axle is a Dana 44 with independent half-shafts. 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. This pressure adjustability gives you considerable control when
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. Assemble next section on to case and bolt tight. Apply a small amount of Red (271) Locktite on the set screw. bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. All Rights Reserved. We happen to run synthetic AFT. The CS2 handles up to 3000 HP; CS3 and CS4 1800 HP. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios. transmissions, 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. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft. The CS1 will control up to 3000 HP. We got to ride along in an ST1200 equipped car, and what a monster of a car it was. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Magnesium case is standard. 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
Once determined, these gear configurations are assembled in their planetary carriers. Then start the tires spinning, now shift the front section so that you are now in high gear. The sun gear is the center of the mechanism's universe. $3,200. No alterations to the transmission, other than the external operating system itself, are required. 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. Add fluids as necessary and install fill plug. Apply a small amount of Red (271) Locktite on the set screw. There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline. You could not make small adjustments, so owners had to be selective in their transmission and rearend gear choices. 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) Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio. Apply a small amount of Red (271) Locktite on the set screw. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. I've made provision, so that shift lever can be moved to the back of the trans quite easily. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Then, continue to screw air servo Out (counter-clockwise) one half turn. 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. 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. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. Thus a 1:1 ratio is achieved. You must multiply each case's underdrive ratio in order to determine the first gear ratio. The Lenco Racinggear reduction unit, when used in conjunction with our CS1, CS2, CS3, or CS4 t.. Lenco Racingmachines our input shafts from 300M and Marage stock. 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. Ourblue,greenandtandisc are supplied new at approximately .058"- .061" thickness. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. 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. - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. It's capacity is much stronger than the small sprag. 3 speed. Do Not Over Tighten. contain a 1.37 ratio planet gear set. Shift pressure is adjustable, whether it be for one case, all cases or anindividual case in a multiple case configuration. When you shift into second gear a lockout happens which "locks" the sun gear, three planet gears, and the ring gear together so that they all spin in unison. Copyright 2020, Lenco Racing. The middle case would also contain a 1.37 planet gear set. 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. Warning: Do Not over tighten set screw. Light weight ring gears (units w/27 and 32 spline shafts only). Lever or CO2 shift. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. The ring gear is then pressed inside of the bearing. The three speed is approximately 135 lbs. The next lever is used for fourth gear and final lever for fifth. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. Pressure set-up kit Our shift pressure set-up kit consists of a separate adjustment tower, lever, pull scale and chart of recommended pressures. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Shift with either our patented. Charlotte , NC. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Building a Lenco ST1200 starts with constructing the soul of the transmission: assembling its planetary gear sets. 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. The arm must be free to move in all directions. 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. 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. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. This change reduced any chance of casting imperfections and it offered more control over the final product. Stay up to date with news and promotions by signing up for our monthlly newsletter. from DarkSide A five speed requires four cases, and a six speed requires five cases. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. If, however, the track is loose from 300 through 500 you can soften
We acheive more than two speeds by combining multiple cases. This is an in-car shot video of Mike drag. The Lencodrive is available with your choice of all popular bellhousing patterns as well as any starter pocket positioning. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Shims before and after the shifter plate assembly -. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. 1.25%(Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 tooth ring gear. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. 4-Speed $9,830. To add more speeds to a planetary transmission you add more sections. Screw air servo into case until it bottoms out against the jam nut. Lenco Parts and Price List isavailable here. Run the air servo jam nut and o-ring up the threads on the servo. You can add additional cases and gearsets that will result in 3 or 4 speeds. These new gear offerings allow Lenco to meet any customer's needs, and allows customers to fine tune their transmission and rear end setup to their hearts desire. 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. The CS2 ,CS3, and CS4
Remove fill plug on top the transmission case you are going to adjust. This is how we engage gears in a traditional manual transmission. What kind of clutch you run is a big factor. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. the shift pressure to maintain desired wheel speed and traction. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. This will allow for free play in the shift system. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Once installed, make sure the air servo is loose and can turn freely. Posted 6 days ago. All transmissions are the sum of their parts. First you need to determine which style clutch packs you are working onsee chart. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Each sun and planet gearset provides two speeds. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. You achieve more than two speeds by combining multiple casesFor 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. Each sun and planet gearset represents two speeds. The tallest to the right is used to shift the transmission from first to second gear. This L.. Purchase the complete LENCO bell housing assembly or individual bellhousing components as needed. 1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. lenco cs3 5 speed. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring 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. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. 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. 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. This is an in-car shot video of Mike drag racing his 73 Duster using a clutch-less Lenco Transmission. The sections are joined by a sprag clutch that restricts rotation of the sun gear to one direction. There are a lot of variables. 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. (only on CS-1 style or center shift transmissions): Air shifted LENCOS come pre adjusted from the factory. I use an electric over air setup to shift my new B and J transmission. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. .. All Lenco coupler clamps are machined from 7075 aircraft grade aluminum. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. For example, a three speed requires two cases. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. Most popular with Sand Dragsters, Mud racers and Modified pullers. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. The rear case a 1.31 ratio gearset. 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. 2 Speed + reverser with Pro output: 18.500". Different Sizes -LENCO utilizes several different styles and sizes of sprags depending on which application the transmission is used for. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. As with all LENCO transmissions a separate reverse unit is employed.