All cases are magnesium. 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. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Lenco, the all time champion and undisputed leader in the drag racing transmissions. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. The truck runs a big-block Chevy that makes 1,100 horsepower on pump gas and lots of nitrous oxide. Magnesium case is standard. gearset/ratio and when connected to additional cases multiple ratios are realized. Then start the tires spinning, now shift the front section so that you are now in high gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 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. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. This is what comes standard in most new LENCO transmissions. It was . A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodriveis 100% Lenco. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. the shift pressure to maintain desired wheel speed and traction. 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. All three units shifted equal final drive ratio of 1:1. Enough to make the run and turnoff before it releases. Run the air servo jam nut and o-ring up the threads on the servo. The planet gears are driven by an encompassing ring gear. for all your racing needs, LENCO transmissions are a planetary design. 1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. Each LENCO transmission is thus a two-speed and is housed in its single dedicated case. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. 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. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. All Rights Reserved. It is also 2-lbs lighter for lower rotational mass which translates to quicker acceleration. 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. John, put a pressure guage at the shifter pod. Lenco, the all time champion and undisputed leader in the drag racing transmissions. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Also known as a 'crash' gearbox for the noise it can make with a mis-timed shift, the non-synchromesh transmission is now only usually found in some trucks. Planetary transmissions, like Lenco, eliminate this inherent design weakness by utilizing planetary gears. Thus a 1:1 ratio is achieved. When the installed lever is loose that section is in low and when the lever is tight the sections in high. 2 Speed + reverser with Std output: 17.500". Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 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. Add fluids as necessary and install fill plug. Lenco, the all time champion and undisputed leader in the drag racing transmissions. To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. Warning: Do Not over tighten set screw. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the. Lenco Parts and Price List isavailable here. 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. 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. Air or lever shift. (2) it is easier to work on the bruno/lenco . Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. The CS2 ,CS3, and CS4 LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. With a simple shift pressure adjustment you can easily compensate The result is LENCO quality and durability at a reasonable "Street Machine" price. - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. 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. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. The total amount of gear reduction depends on the amount of housings and the overall application of the transmission. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. By multiplying these three ratios you come up with a 2.46 first gear ratio. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. Polishing the shift fork helps a lot for consistent shifts. Watch it while someone pushes the shifter button. With its larger size and more teeth, it rotates faster, so it spins the output shaft faster, which in turn spins the rear wheels faster. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. Three planetary gears rotate around the sun gear like planets traveling in their orbit. Every track differs from day to day or hour to hour. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. 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. 1.35%Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 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. To add more speeds to a planetary transmission you add more sections. 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. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. This is what comes standard in most new LENCO transmissions. Going to high on the pressure shocks the transmission and drive-train. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. This worked for the vast majority of consumers, but it left a lot of gaps that prevented fine tuning of a combination because the spacing between the ratios was so spread out. Final drive ratio is 1:1. LENCODRIVE Automatic 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Final drive ratio is 1:1. 1.256%Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. The Lencodrive is available with your choice of all popular bellhousing patterns as well as any starter pocket positioning. A G-force or Liberty face plated 4 speed may be what you want. Sight through plug hole, where you will see the outer edge of the rotary shift plate. Checking Shift Pressure(only on CS-1 style or center shift transmissions): To measure the shift pressure install checking lever into tower screw jam nut all the way up the tower so it's out of the way. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. Assemble next section on to case and bolt tight. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. What this means in practice is you use the clutch pedal to engage first and reverse . 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. It's capacity is much stronger than the small sprag. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. Shift with either our patentedmulti lever system or with the optional, more compact CO2 setup. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. the shift pressure to maintain desired wheel speed and traction. All Lencodrives come with the following (less converter). Then, continue to screw air servo Out (counter-clockwise) one half turn. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. If you want to go straight to the action, skip to around 2:20. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. CS-1 style or center shift transmissions: A typical lever shift assembly Consists of hand levers, activation rods, detent levers, rod towers, adjustment nuts, clevises, heim ends, friction washers, mounting bracket and all Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). Burnout's(on all LENCOS): The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Copyright 2020, Lenco Racing. The LENCO ST1200 is the answer for Pro Street and street/strip applications. 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. 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). Lenco Parts and Price List isavailable here. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The LENCODRIVE is the automatic answer for people who prefer torque converter/automatic transmission applications. Stay up to date with news and promotions by signing up for our monthlly newsletter. Light weight ring gears (units w/27 and 32 spline shafts only). The arm must be free to move in all directions. 3. 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. On the track, however, the low 48 percent first gear should be enough to launch any powerful car hard, and the transmission's history of performance won't let anyone down. 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. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. The first speed is when the ring gear is rotating while the sun gear is stationary. We are able to offer the ST1200 Street/Strip at lower cost than our pure race CS1, CS2, CS3 and CS4 designs since we use 8620 steel instead of 9310 material for the ST1200 gears. This gadget employed three shift levers to accomplish everything that a single lever could do. 4,600. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. Remember that each separate case contains it own 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. This in-car shot video shows a Mopar powered engine combined with the clutch-less Lenco Transmission that produces over 850 real Mopar horsepower!!! 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. Copyright 2020, Lenco Racing. 1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. The 4-speed above shows how to determine drive ratios. Reverse Lockout. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. I purchased the trans disassembled and do not have the shim configuration shown in the drawing. No further adjustments are necessary as there is ample reserve travel in the servo. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Skilled drivers can perform a clutchless shift without hurting their transmission, but it does take a little bit of a learning curve to get there. 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. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. 1.68%Uses 15 tooth planet gears, a 62 tooth sun gear and 91 tooth ring gear. The original solid steel planetary carrier was also replaced with a two-piece planetary carrier that is part steel and part aluminum. of the adjustable shift tower plunger. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. and control slippage. Each sun and planet gearset provides two speeds. Please click here for CS3 Timing Chart (.pdf). 1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. with its dedicated underdrive ratio, determines the immediate drive ratio. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. This change reduced any chance of casting imperfections and it offered more control over the final product. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. In all instances you will require a LENCO reverse unit to achieve reverse movement. By multiplying these three ratios you come up with a 2.46 first gear ratio. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. Different Sizes -LENCO utilizes several different styles and sizes of sprags depending on which application the transmission is used for. at a lesser price than our full race units. Stay up to date with news and promotions by signing up for our monthlly newsletter. Final drive ratio is 1:1. Th.. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Due to the way they are designed and operate, the advantages are clear. 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. The Lenco assembly drawing shows two .030" shims on the front side of the plate and one .180" shim on the side where the pressure plate is. 1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Lenco Racing, the all time champion and undisputed leader in the drag racing. 1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Apply a small amount of Red (271) Locktite on the set screw. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. A large ring gear surrounds the entire solar system of gears. 1.297%Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. With a simple shift pressure adjustment you can easily compensate. Copyright 2020, Lenco Racing. This is a very extreme duty sprag assembly. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 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. 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. Screw air servo into case until it bottoms out against the jam nut. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as thecrankshaft. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. View the whole process and start at the beginning. 1.22%Uses 38 tooth planet gears, a 22 tooth sun gear and a 98 tooth ring gear. Reverse lever. No alterations to the transmission, other than the external operating system itself, are required. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. 5-Speed $10,660. Warning: Do Not over tighten set screw. With a docile nature and racing pedigree, the new ST1200 improves upon the old, making a great transmission even better with improved technology, refined parts, and lower rotational mass for faster acceleration. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios. Throwout bearing collar (4 & 5-speed only). Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Gary Sumek of Lenco mentioned that they have been producing a five-speed street version for a few years. Each case in succession. Simply put, once the transmission is in gear, the power runs through a set of planetary gears. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. Planetary gear sets have two speeds. 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. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. The main advantage of a lenco transmission is its simplicity. We achieve more than two speeds by assembly of multiple cases. The ST1200 is the same engineering design as the all-out-race New Generation CS2 but with a couple of minor differences. 1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Porsche 911-06 side shift transmission for 914 4 or 6. street transmission, 1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components.

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