1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The result is LENCO quality and durability at a reasonable "Street Machine" price. Copyright 2020, Lenco Racing. e30 m52 turbo. 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. The final section is the reverser. 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. Copyright 2020, Lenco Racing. 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. Choice of standard or new generation reverses. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Thus a 1:1 ratio is achieved. See(input diagram). <lol> Trust me, It's no where near shoulder height ! Shift Patterns: All levers in forward position result in the transmission being in first gear. 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. 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. In the example of a four speed, the case nearest the engine would Lencodrive Options: (option pricing only). The arm must be free to move in all directions. This is how we engage gears in a traditional manual transmission. 1.368%Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. sr1200, 300M Input/Cluster Shafts. Screw air servo into case until it bottoms out against the jam nut. CS-1 style or center shift transmissions: To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. The 4-speed above shows how to determine drive ratios. The Lencodrive is available with your choice of all popular bellhousing patterns as well as any starter pocket positioning. There are two different size air servos for the New Generation transmissions. Thus a 1:1 ratio is achieved. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. The planet gears are driven by an encompassing ring gear. 1.22%Uses 38 tooth planet gears, a 22 tooth sun gear and a 98 tooth ring gear. The three speed is approximately 135 lbs. Call the Hurst Lightning Rods, a popular sight in a mid-'80s issue of Hot Rod, a road-going take on a Lenco transmission. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse . The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. Multiple speed transmissions use multiplication of gears to create different speeds. 2 Speed + reverser with Std output: 17.500". It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. Large Sprag Assembly -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. 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. Remove fill plug on top the transmission case you are going to adjust. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. the shift pressure to maintain desired wheel speed and traction. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. Air servos or max-adjust shift towers. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. With its modular design, an infinite number of speeds can be added. Thus a 1:1 ratio is achieved. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Air or lever shift. The arm is held into the servo piston by a set screw. The ring gear is then pressed inside of the bearing. 1.44%Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. By multiplying thesethree ratios you come up with a 2.46 first gear ratio. The Lenco is basically a planetary transmission where each gear has its own housing and its own shift lever. Likes Received: 180. The choice is yours. 4 speed. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. All LENCO transmissions can be shifted with levers or a CO2 system. Remember that each separate case contains it own When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. 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. We got to ride along in an ST1200 equipped car, and what a monster of a car it was. The rear case a 1.31 ratio gearset. It's capacity is much stronger than the small sprag. 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. The planet gears are driven by an encompassrng flng gear. All transmissions, once assembled, have to be installed in a car. Reverse is handled by a reverser section that is attached to the rear of the transmission. 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. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. 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. The rear axle is a Dana 44 with independent half-shafts. - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. 3 speed. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. In general, all LENCO transmissions are a planetary design. All Rights Reserved. Pistol Grip Manual Shifter. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 3. 1.41%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. 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. In all instances the transmission is then shifted to a 1:1 direct drive ratio by depression A G-force or Liberty face plated 4 speed may be what you want. up to the CO2 configuration or vice versa. Apply a small amount of Red (271) Locktite on the 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. Lenco Parts and Price List isavailable here. Assemble next section on to case and bolt tight. You can expand to 3 or 4 speeds by addition of additional cases. 1.500% Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Shift with either our patented. 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. (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. In all instances you will require a LENCO reverse unit to achieve reverse movement. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. Do Not Over Tighten. Reverse lever. 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. Both ATF and engine oil supply the required amount of lubrication and cooling for a Lenco transmission. There are a lot of variables. the final shift, being locked to a 1:1 ratio. 1.22% (1.219) - 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. 1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. 1.35%Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 tooth ring gear. Choice of output shaft length and spline. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. All transmissions work by using gear ratios to transfer power to the rear wheels. 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. Double Large Sprag Assembly -This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. Final drive ratio is 1:1. A five speed requires four cases, and a six speed requires five cases. 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. The second lever, and second tallest, is used for third gear. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. It is sometimes necessary to have an extra floater disc to reach the desired clutch pack clearance and normally the extra floater would go next to the planet case. The second lever, and second tallest, is used for third gear. Upshifting is very commonly done this way, but you can also do it while downshifting. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 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. Unfortunately, we no longer sale small Sprags do to the ever increasing horse power produced with today's motors. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. The next lever is used for fourth gear and final lever for fifth. Proving itself to be a dependable and excellent option that fits with the blending of racing and street-driven cars, the dual clutch transmission has taken manual transmission performance to a whole new level. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. 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. 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 CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. 1.256%Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. For example, a three speed requires two cases. You may choose any conventional input shaft spline. 3 Speed + reverser with Std output: 24.000". Lever or CO2 shift. all hardware. 1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. 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. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. 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. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people who have asked for a safe and affordable torque converter driven transmission. A BorgWarner T56 six-speed transmission was used in the Viper; automatics have never been available. 2 Speed with single brg and std output: 16.875". 1.46%Uses 22 tooth planet gears, a 37 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. with its dedicated underdrive ratio, determines the immediate drive ratio. Gears attached to the output shaft are loosely connected. 1.280%Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. 1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear. Every track differs from day to day or hour to hour. custom vertical gate shifter, push button downshifting. When setting up your clutch packs they need to have the proper air gap or clutch pack clearance. His dial-in time is 10.60 and his ET for this race was a 10.61. This action compresses an internal clutch pack which results in a final driveratio of 1:1. 9. The middle case would also contain a 1.37 planet gear set. This is not possible with a traditional cluster gear transmission. The original ST1200 came with a cast aluminum case, gasket seals, and a range of selectable gear ratios. The planet gears are driven by an encompassing ring gear. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. The three speed is approximately 135 lbs. New and Used Parts Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Once determined, these gear configurations are assembled in their planetary carriers. 1.50%Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. The simplicity also makes them easy to repair if something goes wrong . Lenco revamped the ST1200, by replacing sand molds with CNC 5 and 6-axis milling machines. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. The Lencodrive does not require a containment blanket unless you use a supercharger or alternative fuels. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. INSTALLATION Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. 9310 steel would be used in Pro Stock, Pro Mod and other similar applications where substantially more HP, torque and tire plant is generated. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. The middle case would also contain a 1.37 planet gear set. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. 5.6K views, 84 likes, 1 loves, 13 comments, 17 shares, Facebook Watch Videos from Lenco Racing Transmissions, Inc.: David answers a few FAQ on CS-1 thru CS-4 Transmissions 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. 1 position forward selects 1st gear, then 2nd gear is selected by . Th.. The first speed is when the ring gear is rotating while the sun gear is stationary. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Once installed, make sure the air servo is loose and can turn freely. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 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. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodriveis 100% Lenco. Lenco offers an extensive variety of transmissions. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. automatic, But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. Each LENCO transmission is thus a two-speed and is housed in its single dedicated case. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. Each case in succession. Lencodrive 4 Speed. Recommended for cars making up to 1200 HP the ST1200 is pure LENCO through and through. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. 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. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. You may choose any conventional input shaft spline. A five speed requires four cases, and a six speed requires five cases. 3 Speed with single brg and std output: 23.375". Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. You can expand to 3 or 4 speeds by addition of additional cases. This is a very extreme duty sprag assembly. 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.
