Due to the way they are designed and operate, the advantages are clear. The downside of this setup is that the shafts are only supported on their ends, so the shaft can bend with torque. 1.19%Uses 21/33 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. Lenco Street Transmissions - Super Chevy Magazine - MotorTrend Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. 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. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth 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. Lenco offers an extensive variety of transmissions. Burnout's (on all LENCOS): The choice is yours. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. A five speed requires four cases, and a six speed requires five cases. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. This is not possible with a traditional cluster gear transmission. drag racing, Recommended for cars making up to 1200 HP the ST1200 is pure LENCO through and through. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. A five speed requires four cases, and a six speed requires five cases. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 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. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Copyright 2020, Lenco Racing. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. This will allow for free play in the shift system. The original transmission was and is still a bulletproof transmission for the street/strip crowd. When locked, the gear's ratio is translated to the output shaft as the gear and the output shaft are now fixed. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. Lenco has gone through a lot of changes in the past year, with a new owner and new location, the team at Lenco set out to redesign, revamp, and redefine the ST1200 street transmission as the new . 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. Once installed, make sure the air servo is loose and can turn freely. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Please click here for CS3 Timing Chart (.pdf). The planet gears are driven by an encompassing ring gear. This clearance should be between .080"-.120" and can be adjusted by adding or subtracting floaters . The planetary carrier that is holding the sun gear and planetary gears and clutch pack is placed inside the ring gear. 300M Input/Cluster Shafts. 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 The planet gears are driven by an encompassrng flng gear. Our most common style clutch disc is the green disc and it comes in two sizes depending on which style transmission you are working on. It is not necessary for the driver to disengage the clutch when shifting from ratio to ratio. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Lenco has gone through a lot of changes in the past year, with a new owner and new location, the team at Lenco set out to redesign, revamp, and redefine the ST1200 street transmission as the new leader in street planetary transmissions. It was . 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. racing transmission, This intermediate shaft connects this planetary gear set to subsequent planetary gear sets which make up the modular nature of this transmission. All levers in forward position result in the transmission being in first gear. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline. 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. John, put a pressure guage at the shifter pod. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). The middle case would also contain a 1.37 planet gear set. Charlotte , NC. transmissions, Copyright 2020, Lenco Racing. Clutchless shifting is the practice of changing or shifting your gear without touching the left bar lever. The CS2 ,CS3, and CS4 This gadget employed three shift levers to accomplish everything that a single lever could do. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. We got to ride along in an ST1200 equipped car, and what a monster of a car it was. Air or manual shift. Purpose designed and produced for drag, ski and river boat requirements. These are the 5 weirdest transmissions ever sold | Driving Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. You may choose any conventional input shaft spline. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. You must multiply each cases underdrive ratio in order to determine the first gear ratio. Copyright 2020, Lenco Racing. 5-Speed $10,660. word-day-lightning-rods | News | Grassroots Motorsports Then, continue to screw air servo Out (counter-clockwise) one half turn. Please call for ordering or technical information. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. 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. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Here's some fuzzy footage showing the operation. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.338%Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 1.256%Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. When discs wear to .052" or less they must be replaced. View the whole process and start at the beginning. contain a 1.37 ratio planet gear set. Transmissions and Clutches, Racing Transmissions for sale on RacingJunk Light weight components. Planetary gear sets have two speeds. 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. The rear axle is a Dana 44 with independent half-shafts. 1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 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. The shift lever is almost the same height as the standard 5th gear lever. Magnesium cases are used for both the CS2, CS3 and CS4. Enough to make the run and turnoff before it releases. Do Not Over Tighten. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. All three units shifted equal final drive ratio of 1:1. 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. All cases are magnesium. 3/4" Gear Set. It is also 2-lbs lighter for lower rotational mass which translates to quicker acceleration. 1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 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. Lenco's transmissions can either be manually shifted or gas shifted with CO2. Assemble next section on to case and bolt tight. Porsche 911-06 side shift transmission for 914 4 or 6. It might be less, it might be much more. Screw air servo into case until it bottoms out against the jam nut. 3 Speed with single brg and std output: 23.375". 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. the sun gear from rotating in one direction. All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. 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. 1.405%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. 4-Speed $9,830. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. the shift pressure to maintain desired wheel speed and traction. Lencodrive - Lenco Racing Transmissions and control slippage. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. Or maybe simply a T56 magnum is all you need. INSTALLATION Toploader 4 speed shifter tech | Pirate 4x4 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. Mountains Garage: How To Shift A Lenco Racing Transmission Shift with either our patented multi lever system or with the . In all instances you will require a LENCO reverse unit to achieve reverse movement. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. Air or lever shift. 1. fine tuning your available power application to specific track conditions. (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. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. The result is LENCO quality and durability at a reasonable "Street Machine" price. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. EASY SHIFTING with David Sumek | David answers a few FAQ on - Facebook The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. The boat clutch provides gentle engagement and disengagement. 1.35%Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 tooth ring 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. This is a very extreme duty sprag assembly. Each gear is engaged by pulling down on the shift lever, to activate the clutch mechanism for each gear set. 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. 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. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases provide multiple underdrive ratios. 1 position forward selects 1st gear, then 2nd gear is selected by . custom vertical gate shifter, push button downshifting. By multiplying these three ratios you come up with a 2.46 first gear ratio. Exclusively V.A.R. ST1200 Street Strip 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. It's a transmission that will set any street/strip car apart from the competition, with performance to match its new all-aluminum billet CNC looks. 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. It's capacity is much stronger than the small sprag. 1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. 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. 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. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. This unique clutch is a very popular replacement for clunky V-drive dog style in-out boxes. For more specific information on any of these Lenco transmissions please refer to the Tabs below, or call our tech line at(909) 673-9080. Glazed, burned and chipped discs must also be replaced immediately. Upshifting is very commonly done this way, but you can also do it while downshifting. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. We achieve more than two speeds by assembly of multiple cases. Shifters - Lenco Racing Transmissions The biggest benefit to Pro Streeters is that you don't have to worry about overheating, flashing the torque converter or other maintenance costs-as there are none. You can expand to 3 or 4 speeds by addition of additional cases. Every track differs from day to day or hour to hour. Apply a small amount of Red (271) Locktite on the set screw. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set CS-1 style or center shift 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. Yes, there are 18 different car gearbox types - MSN Copyright 2020, Lenco Racing. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. 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. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. 1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. The three speed is approximately 135 lbs. 2 Speed with single brg and std output: 16.875". 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. Run the air servo jam nut and o-ring up the threads on the servo. Air servos or max-adjust shift towers. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. Apply a small amount of Red (271) Locktite on the set screw. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. 1.46%Uses 22 tooth planet gears, a 37 tooth sun gear and an 80 tooth ring gear. When the installed lever is loose that section is in low and when the lever is tight the sections in high. We happen to run synthetic AFT. I purchased the trans disassembled and do not have the shim configuration shown in the drawing. 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. Lenco downshifting - YouTube 1.25%(Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. 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. 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? 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. 1.25%(Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 tooth ring gear. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. The rear case a 1.31 ratio gearset. The Lencodrive is available with your choice of all popular bellhousing patterns as well as any starter pocket positioning. 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. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. Think of it as manually shifting an automatic transmission. Lenco Transmissions Tech. 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. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. of the adjustable shift tower plunger. 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. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear.