The next lever is used for fourth gear and final lever for fifth. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Purpose designed and produced for drag, ski and river boat requirements. Lenco offers an extensive variety of transmissions. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. 5 likes, 0 comments - Dale's Transmission (@dalesa1transmission) on Instagram: "Weird Transmission Wednesday The Lenco Lenco is not the only manufacturer of these types ." Dale's Transmission on Instagram: "Weird Transmission Wednesday The Lenco Lenco is not the only manufacturer of these types of transmissions, but it is . Once installed, make sure the air servo is loose and can turn freely. 150 is the usual middle starting point. lenco air shift options | InsideTopAlcohol 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. Choice of output shaft length and spline. Lenco, the all time champion and undisputed leader in the drag racing transmissions. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. A G-force or Liberty face plated 4 speed may be what you want. Three planetary gears rotate around the sun gear like planets traveling in their orbit. Magnesium cases are used for both the CS2, CS3 and CS4. Since the 30 wt oil is thicker it takes a . The Lencodrive is pure Lenco through-and-through with the same gearset components as our CS2. (2) it is easier to work on the bruno/lenco . This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. You must multiply each cases underdrive ratio in order to determine the first gear ratio. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Magnesium Case. The LENCO ST1200 is the answer for Pro Street and street/strip applications. Lencodrive 4 Speed. Each planetary gear set is in its own housing and carries a higher ratio. Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. The only difference is that in an automatic, the transmission fluid moves internal valves to close the clutch pack. When the installed lever is loose that section is in low and when the lever is tight the sections in high. Stay up to date with news and promotions by signing up for our monthlly newsletter. 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. Lenco Air Shift Servo CS-1/CS-2/CS-3 - RBS Superchargers Input shaft. 1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear. Adjustment: The planet gears are driven by an encompassrng flng 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. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. Lenco, the all time champion and undisputed leader in the drag racing transmissions. You must multiply each case's underdrive ratio in order to determine the first gear ratio. This is what comes standard in most new LENCO transmissions. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. By multiplying these three ratios you come up with a 2.46 first gear ratio. This will allow for free play in the shift system. Polishing the shift fork helps a lot for consistent shifts. The Lencodrive comes as a 2 speed with reverse. Screw the servo into the transmission case until contact is made with the shift fork pin. Thus a 1:1 ratio is achieved. 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. 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. 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 arm must be free to move in all directions. The middle case would also contain a 1.37 planet gear set. (only on CS-1 style or center shift transmissions): Air shifted LENCOS come pre adjusted from the factory. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. All Rights Reserved. In-Car Shot Drag Racing Lenco Transmission Video - YouTube 1. jody - even though i don't run a lencodrive and i have 2 bruno/lencos, i believe i can highlite some differences. 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. 1.44% - Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Uses 225mm clutch pack in a reverse. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. Clutchless Shifting: What It Is & How to Do It Safely - Horsepowerful Lenco drive clutch question | InsideTopAlcohol 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 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!!! In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. It's capacity is much stronger than the small sprag. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. View the whole process and start at the beginning. This change reduced any chance of casting imperfections and it offered more control over the final product. Then start the tires spinning, now shift the front section so that you are now in high gear. Lenco Racing, the all time champion and undisputed leader in the drag racing. In general, all LENCO transmissions are a planetary design. The planet gears are driven by an encompassing ring gear. Second gear ratio is 1.80 and third gear is a 1.31 ratio. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. 5-Speed $10,660. Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). The next lever is used for fourth gear and final lever for fifth. Once engaged, the gears are shifted without a clutch. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set Apply a small amount of Red (271) Locktite on the set screw. Attach air lines and your race ready. Copyright 2020, Lenco Racing. The CS-2 is much easier to work on than the CS-1. The rear case a 1.31 ratio gearset. Yes, there are 18 different car gearbox types - MSN 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. This is an in-car shot video of Mike drag racing his 73 Duster using a clutch-less Lenco Transmission. The CS1 Standard Design LENCO is recommended for the most severe applications and is capable of repeatable consistency with a minimum of maintenance. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed case. 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. You must multiply each case's underdrive ratio in order to determine the first gear ratio. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. Copyright 2020, Lenco Racing. Add fluids as necessary and install fill plug. With a simple shift pressure adjustment you can easily compensate. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Shims before and after the shifter plate assembly -. The first speed is when the ring gear is rotating while the sun gear is stationary. This is a very extreme duty sprag assembly. You can expand to 3 or 4 speeds by addition of additional cases. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. Choice of standard or new generation reverses. Street and Drag Racing Transmissions - Engine Builder Magazine The second lever, and second tallest, is used for third gear. automatic, Second gear ratio is 1.80 and third gear is a 1.31 ratio. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. necessary hardware. multi lever system or with the optional, more compact CO2 setup.

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