The planetary carrier that is holding the sun gear and planetary gears and clutch pack is placed inside the 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. for all your racing needs, LENCO transmissions are a planetary design. Air or lever shift. You could not make small adjustments, so owners had to be selective in their transmission and rearend gear choices. 1.378%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. Shift with either our patented. Each case in succession. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Final drive ratio is 1:1. First you need to determine which style clutch packs you are working onsee chart. Yes, there are 18 different car gearbox types - MSN 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. Manual 2 Speed with Neutral Safety [DRIVE-2-S], Manual 3 Speed with Neutral Safety [DRIVE-3-S], Manual 4 Speed with Neutral Safety [DRIVE-4-S], Lockout Shift with Neutral Safety [DRIVE-L-S]. The LENCO ST1200 is the answer for Pro Street and street/strip applications. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. Tags: When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft. 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. Multiple speed transmissions use multiplication of gears to create different 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. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. All three units shifted equal final drive ratio of 1:1. No further adjustments are necessary as there is ample reserve travel in the servo. These are the 5 weirdest transmissions ever sold | Driving Adjustment: street transmission, 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. Lencodrive 3 Speed and Reverse | Lenco About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Air servos are machined from billet alum. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. The dual clutch manual transmission is simply fast. 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. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. You can expand to 3 or 4 speeds by addition of additional cases. Remove fill plug on top the transmission case you are going to adjust. 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. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. 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. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people who have asked for a safe and affordable torque converter driven transmission. In general, all LENCO transmissions are a planetary design. It also allowed Lenco to shave as much weight as possible from the finished part. Run the air servo jam nut and o-ring up the threads on the servo. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1 position forward selects 1st gear, then 2nd gear is selected by . This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. RATIO CHART Low drag (angluar contact and needle bearings). This unique clutch is a very popular replacement for clunky V-drive dog style in-out boxes. Or maybe simply a T56 magnum is all you need. Lenco offers an extensive variety of transmissions. 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. 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. To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. All Rights Reserved. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. The main advantage of a lenco transmission is its simplicity. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. Shift Patterns: All levers in forward position result in the transmission being in first gear. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. The lever arms also vary in length. lntroduced in 1972 as a 2-speed the Standard Design LENCO is our largest and strongest transmission. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. and control slippage. It might be less, it might be much more. Stay up to date with news and promotions by signing up for our monthlly newsletter. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. All transmissions work by using gear ratios to transfer power to the rear wheels. A first-to-fourth skip-shift solenoid is used on the transmission to help increase fuel economy. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. 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 It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. 1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the. 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. Casings are anodized and set in a mechanical press. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. 9. When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). Section upon section are bolted together until the transmission takes shape, growing taller than the technician building it. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. The first speed is when the ring gear is rotating while the sun gear is stationary. Pistol Grip Manual Shifter. from DarkSide The Lencodrive does not require a containment blanket unless you use a supercharger or alternative fuels. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. The Lencodrive is pure Lenco through-and-through with the same gearset components as our CS2. For additional information about Lenco products please email us here, or call us at (909) 673-9080. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. Going to high on the pressure shocks the transmission and drive-train. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. For example, a three speed requires two cases. In general, all LENCO transmissions are a planetary design. the sun gear from rotating in one direction. 1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear. The three speed is approximately 135 lbs. We recommend that you discuss your application with our technical representatives and follow their suggestions on which All Rights Reserved. Copyright 2020, Lenco Racing. The CS2 handles up to 3000 HP; CS3 and CS4 1800 HP. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. In-Car Shot Drag Racing Lenco Transmission Video - YouTube 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. Assemble next section on to case and bolt tight. The middle case would also contain a 1.37 planet gear set. Since the 30 wt oil is thicker it takes a . Gears attached to the output shaft are loosely connected. The gearset in the third case alone, 1.31:1, determines the third gear ratio. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. All transmissions, once assembled, have to be installed in a car. We got to ride along in an ST1200 equipped car, and what a monster of a car it was. 1.48%Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. 1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear. . Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. LENCODRIVE Automatic WATCH THIS: Shifting a Lenco | Hemmings The CS1 Standard Design LENCO is recommended for the most severe applications and is capable of repeatable consistency with a minimum of maintenance. The second lever, and second tallest, is used for third gear. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. All three units shifted equal final drive ratio of 1:1. word-day-lightning-rods | News | Grassroots Motorsports The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. This pressure adjustability gives you considerable control when 1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. All levers in forward position result in the transmission being in first gear. It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. Lencodrive Options: (option pricing only). Clutchless shifting is the practice of changing or shifting your gear without touching the left bar lever. See(input diagram). The Lenco Racing Lencodrive 4Speed Automatic Transmission represents our response to people wh.. At the time of your inital order, you may add additional sections to your Lencodrive Automatic Lenco.. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. All three units shifted equal final drive ratio of 1:1. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. The power is passed straight through from one planetary gear set into the next gear set and the process repeats again. You may choose any conventional input shaft spline. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. The CS-2 is much easier to work on than the CS-1. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 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. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. The rear case a 1.31 ratio gearset. The arm must be free to move in all directions. Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. 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. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. We acheive more than two speeds by combining multiple cases. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. Refining the machining process of how the gears are made and even designed resulted in more efficient gears that mesh together easier than the previous version. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. All ST1200 Street units now come with low drag bearings and a billet case. 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. 3 Speed with single brg and std output: 23.375". 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Screw the servo into the transmission case until contact is made with the shift fork pin. The sun gear only rotates when it is locked with the ring gear. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 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. Take the Hurst Lightning Rods, an aftermarket performance shifter marketed in the 1980s. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. 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 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. 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. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Thus a 1:1 ratio is achieved. 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. Attach air lines and your race ready. Tags: Transmission Bruno or lencodrive | InsideTopAlcohol 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. Warning: Do Not over tighten set screw. 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. Reverse is handled by a reverser section that is attached to the rear of the transmission. Three planetary gears rotate around the sun gear like planets traveling in their orbit. Lenco Air Shift Servo CS-1/CS-2/CS-3 - RBS Superchargers In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. Think of it as manually shifting an automatic transmission. You must multiply each case's underdrive ratio in order to determine the first gear ratio. Screw the servo into the transmission case until contact is made with the shift fork pin. Jeff says that he loves the transmission and "the only thing different [from driving a traditional gearbox] is that there is no engine braking". The CS2 ,CS3, and CS4 You can add additional cases and gearsets that will result in 3 or 4 speeds. Typically the CS-1 and CS-3 run the 2.50" piston air servo (150 psi) and the CS-2 and Lenco drive runs the 3.00" piston (250 psi). 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. 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. These four gears (sun gear and three planet gears) sit in a planetary carrier that holds them together as a unit. Input shaft. 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. This change reduced any chance of casting imperfections and it offered more control over the final product. 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. A Cool Idea at the Time: The Hurst Lightning Rods Shifter Air servos are specific to the type of Lenco you run so be sure to pick the correct one from the drop down menu. Upshifting is very commonly done this way, but you can also do it while downshifting. Th.. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. No alterations to the transmission, other than the external operating system itself, are required. Lenco, the all time champion and undisputed leader in the drag racing transmissions. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. Watch it while someone pushes the shifter button. Recommended for cars making up to 1200 HP the ST1200 is pure LENCO through and through. Run the air servo jam nut and o-ring up the threads on the servo. The only difference is that in an automatic, the transmission fluid moves internal valves to close the clutch pack. Apply a small amount of Red (271) Locktite on the set screw. It was . Lenco Drag race car. This is a very extreme duty sprag assembly. Lenco Parts and Price List isavailable here. 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. 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. Air servo or max-adjust shift tower and lever. CS-1 style or center shift transmissions: Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. Reverse lever. 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. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. Each sun and planet gearset provides two speeds. There are a lot of variables. Stay up to date with news and promotions by signing up for our monthlly newsletter. all hardware. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Copyright 2020, Lenco Racing. Th.. 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. 1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. The position of the shift lever is relative to the application.