1.356% Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. The CS2 handles up to 3000 HP; CS3 and CS4 1800 HP. 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. 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 arm is held into the servo piston by a set screw. 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. By multiplying these three ratios you come up with a 2.46 first gear ratio. It has an electric solenoid that receives air from an adjustable regulator. There are a lot of variables. shift pressure control. The Lencodrive comes as a 2 speed with reverse. Copyright 2020, Lenco Racing. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. It is also 2-lbs lighter for lower rotational mass which translates to quicker acceleration. New and Used Parts 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. Magnesium cases are used for both the CS2, CS3 and CS4. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. It might be less, it might be much more. Screw air servo into case until it bottoms out against the jam nut. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. The middle case would also contain a 1.37 planet gear set. You may choose any conventional input shaft spline. The main advantage of a lenco transmission is its simplicity. 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. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Easy to use and necessary for fine tuning Lenco Racing, the all time champion and undisputed leader in the drag racing. Lenco revamped the ST1200, by replacing sand molds with CNC 5 and 6-axis milling machines. A large ring gear surrounds the entire solar system of gears. sr1200, 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. drag racing, No further adjustments are necessary as there is ample reserve travel in the servo. 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. Shift Patterns: necessary hardware. fine tuning your available power application to specific track conditions. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. How is this done? Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. 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. the shift pressure to maintain desired wheel speed and traction. The ST1200 is the same engineering design as the all-out-race New Generation CS2 but with a couple of minor differences. Warning: Do Not over tighten set screw. The CS1 planetary gear size is 1". The downside of this setup is that the shafts are only supported on their ends, so the shaft can bend with torque. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. It is bolted to the end of the transmission with a splined output shaft which will await the driveshaft yoke. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 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. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. Tags: 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. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Race prepped Hydramatic. Multiple speed transmissions use multiplication of gears to create different speeds. all hardware. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases provide multiple underdrive ratios. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. Upshifting is very commonly done this way, but you can also do it while downshifting. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. With its modular design, an infinite number of speeds can be added. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. 1.50%Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. His typical drives usually include lighting up the rear tires while going sideways as he yanks the levers back, shifting the ensemble of levers to move the transmission through 1st, 2nd, and 3rd in quick succession. What this means in practice is you use the clutch pedal to engage first and reverse . 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. 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. ln general, all Lenco transmissions are a planetary design. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. When the installed lever is loose that section is in low and when the lever is tight the sections in high. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. You may choose any conventional input shaft spline. Each sun and planet gearset provides two speeds. 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. Lever or CO2 shift. 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. Then, continue to screw air servo Out (counter-clockwise) one half turn. You can expand to 3 or 4 speeds by addition of additional cases. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. 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. Material Gears. 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. Assemble next section on to case and bolt tight. The middle case would also contain a 1.37 planet gear set. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Air servo or max-adjust shift tower and lever. All Rights Reserved. Final drive ratio is 1:1. Or maybe simply a T56 magnum is all you need. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. You can expand to 3 or 4 speeds by addition of additional cases. INSTALLATION This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. 4,600. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. John, put a pressure guage at the shifter pod. First you need to determine which style clutch packs you are working onsee chart. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. The 4-speed above shows how to determine drive ratios. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. Shafts are available in Marage or 300M material.16 or 32 spline. Reverse is a small black lever. The tallest to the right is used to shift the transmission from first to second gear. Each sun and planet gearset provides two speeds. The second lever, and second tallest, is used for third gear. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. 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 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. 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. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. One variation is that the ST1200 uses budget-friendly 8620 alloy for the gears instead of the more expensive 9310 material. This means that it can run for years without any maintenance and still operate smoothly. Stay up to date with news and promotions by signing up for our monthlly newsletter. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Unlike a traditional manual transmission with its singe shifter, planetary transmissions have multiple levers which are used to shift the transmission. The Lencodrive comes as a 2 speed with reverse. 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. The LENCO ST1200 is the answer for Pro Street and street/strip applications. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. 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. 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. The lever arms also vary in length. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. I've mounted it where It's most comfortable for me. and control slippage. 1.48%Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. Final drive ratio is 1:1. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components. 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 its dedicated underdrive ratio, determines the immediate drive ratio. View the whole process and start at the beginning. All ST1200 Street units now come with low drag bearings and a billet case. Gary Sumek of Lenco mentioned that they have been producing a five-speed street version for a few years. All levers in forward position result in the transmission being in first gear. A G-force or Liberty face plated 4 speed may be what you want. Thus a 1:1 ratio is achieved. All transmissions, once assembled, have to be installed in a car. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. 1. 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. 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. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. 1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 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. All levers in forward position result in the transmission being in first gear. multi lever system or with the optional, more compact CO2 setup. In the example of a four speed, the case nearest the engine would If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. Thus a 1:1 ratio is achieved. Shown with our boat bellhousing. 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. We recommend that you discuss your application with our technical representatives and follow their suggestions on which 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. All cases are magnesium. This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. Shims before and after the shifter plate assembly -. As with all LENCO transmissions a separate reverse unit is employed. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. 1.378%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. Lencodrive 2 Speed. Add fluids as necessary and install fill plug. Rotate air servo into case until you see the set screw in the air servo piston boss inside the 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. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Lencodrive 3 Speed. (only on CS-1 style or center shift transmissions): Air shifted LENCOS come pre adjusted from the factory. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. First gear is the furthest lever from the driver with higher gears being the nearest levers. With a simple shift pressure adjustment you can easily compensate. View the whole process and start at the beginning. See(input diagram). Section upon section are bolted together until the transmission takes shape, growing taller than the technician building it. 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. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. The shifting process removes multiplication factors and subsequently results in all gear-sets, after Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. The first speed is when the ring gear is rotating while the sun gear is stationary. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Shifters and lockouts can be either style. This is an in-car shot video of Mike drag racing his 73 Duster using a clutch-less Lenco Transmission. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodrive is 100% Lenco. The planet gears are driven by an encompassrng flng gear. Copyright 2020, Lenco Racing. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. Please call for ordering or technical information. LENCODRIVE Automatic Sight through plug hole, where you will see the outer edge of the rotary shift plate. It also allowed Lenco to shave as much weight as possible from the finished part. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. This can cause tire shake. e30 m52 turbo. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. The sun gear is the center of the mechanism's universe. 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. There are two different size air servos for the New Generation transmissions. 8620 is a premium quality material that will provide excellent service for 1200 HP hot rods. Available in either bare aluminum (clear) or hard anodized black finish, you can choose the transmission finish that best suits your style; however, Lenco highly recommends the standard hard anodized black finish as transmissions usually live a hard life underneath a car where no one can see it, and where it is subject to lots of splashing and hits from rocks and other road debris. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. If you want to go straight to the action, skip to around 2:20. Air shifted LENCOS come pre adjusted from the factory. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 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. Adjustment: 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. Screw air servo into case until it bottoms out against the jam nut. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. Tags: Shift pressure is adjustable, whether it be for one case, all cases or anindividual case in a multiple case configuration. CS2, CS3, CS4 & Lencodrive or offset shift transmissions: racing transmission, Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. The CS-2 is much easier to work on than the CS-1. Polishing the shift fork helps a lot for consistent shifts. Building a Lenco ST1200 starts with constructing the soul of the transmission: assembling its planetary gear sets. The tallest to the right is used to shift the transmission from first to second gear. The first gear set is multiplied by the next, which is multiplied by any subsequent gears sets to eventually reach the final drive ratio of 1:1 where the output shaft is spinning as fast as the input shaft (or overdrive which is any ratio lower than 1 like .85:1). Second gear ratio is 1.80 and third gear is a 1.31 ratio. The Lencodrives come with three different shafts, a Ford, a GM, and a 1 1/4. transmissions, It's capacity is much stronger than the small sprag. Each sun and planet gearset represents two speeds. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. In all instances you will require a LENCO reverse unit to achieve reverse movement. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. This is what comes standard in most new LENCO transmissions. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Add fluids as necessary and install fill plug. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Operation of a Lenco is fairly straight-forward: When it's time to shift gears, simply pull the appropriate lever, with each gear having its own stick. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. 1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 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. of the adjustable shift tower plunger. Engineered for 1200 HP. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. 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. 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. Posted 6 days ago. In all instances the transmission is then shifted to a 1:1 direct drive ratio by depression 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. We found the small Sprags service life growing shorter and shorter, so we have discontinued it and highly recommend upgrading to our large Sprag assembly. casa grande dispatch obituary,
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