It might be less, it might be much more. In general, all LENCO transmissions are a planetary design. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. 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. All Rights Reserved. There are two different size air servos for the New Generation transmissions. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. This change cut down weight substantially which added to the overall rotational mass reduction. 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. 1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Lenco, the all time champion and undisputed leader in the drag racing transmissions. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun gear. - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. The power is passed straight through from one planetary gear set into the next gear set and the process repeats again. Each case in succession. Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. 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. Going to high on the pressure shocks the transmission and drive-train. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. LENCODRIVE Automatic
Choice of output shaft length and spline. Remove fill plug on top the transmission case you are going to adjust. Lenco offers an extensive variety of transmissions. drag racing, 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. 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. The CS-2 is much easier to work on than the CS-1. Changing gears and setting it up is the same for the CS-2 and the Lencodrive. 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. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. When setting up your clutch packs they need to have the proper air gap or clutch pack clearance. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as thecrankshaft. You can expand to 3 or 4 speeds by addition of additional cases. Since the 30 wt oil is thicker it takes a . It was . 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. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. automatic, The Lencodrive is pure Lenco through-and-through with the same gearset components as our CS2. Different Sizes -LENCO utilizes several different styles and sizes of sprags depending on which application the transmission is used for. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. Magnesium Case. 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 . 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. Lenco, the all time champion and undisputed leader in the drag racing transmissions. lenco cs3 5 speed. All Rights Reserved. If he shifts slower, the transmission shifts softer; if he shifts faster, the transmission shifts harder. 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. Originally the ST1200 was only offered with a selection of five gear ratios (1.25, 1.31, 1.38, 1.44, and 1.48). Shift Patterns: Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 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. Upshifting is very commonly done this way, but you can also do it while downshifting. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. The truck runs a big-block Chevy that makes 1,100 horsepower on pump gas and lots of nitrous oxide. Lencodrives is a CS-2 transmission. The 1 1/4 is the best and used in Top Alcohol and Pro Mod. 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. For example, a three speed requires two cases. transmission, The Lencodrive comes as a 2 speed with reverse. Run the air servo jam nut and o-ring up the threads on the servo. Lever or CO2 shift. LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. and control slippage. Th.. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. They only serve to transfer the power of the ring gear to the planetary and to rotate around the sun gear if the sun gear is held stationary by the sprag clutch. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The planet gears are driven by an encompassrng flng gear. What this means in practice is you use the clutch pedal to engage first and reverse . 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? You could not make small adjustments, so owners had to be selective in their transmission and rearend gear choices. I've made provision, so that shift lever can be moved to the back of the trans quite easily. I use an electric over air setup to shift my new B and J transmission. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. The LENCO ST1200 is the answer for Pro Street and street/strip applications. .. All Lenco coupler clamps are machined from 7075 aircraft grade aluminum. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. The rear case a 1.31 ratio gearset. Here's some fuzzy footage showing the operation. Shafts are available in Marage or 300M material.16 or 32 spline. Copyright 2020, Lenco Racing. The arm must be free to move in all directions. 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. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. 1.22% (1.219) - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. Input shaft. Final drive ratio is 1:1. Once installed, make sure the air servo is loose and can turn freely. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Due to the way they are designed and operate, the advantages are clear. Each sun and planet gearset provides two speeds. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Each LENCO transmission is thus a two-speed and is housed in its single dedicated case. Reverse is handled by a reverser section that is attached to the rear of the transmission. Lenco Transmissions Tech. If you want to go straight to the action, skip to around 2:20. 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. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. Then, continue to screw air servo Out (counter-clockwise) one half turn. By multiplying these three ratios you come up with a 2.46 first gear ratio. 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. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. Planetary transmissions, like Lenco, eliminate this inherent design weakness by utilizing planetary gears. The planet gears are driven by an encompassing 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. racing transmission, 1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear. Posted 6 days ago. A five speed requires four cases, and a six speed requires five cases. Choice of ratio. 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. shift pressure control. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. the final shift, being locked to a 1:1 ratio. Attach air lines and your race ready. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. If it takes over one second to reach full pressure at the pod, you have a restriction (regulator, line, button). The rear axle is a Dana 44 with independent half-shafts. 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. CS-1 style or center shift transmissions: All cases are magnesium. This in-car shot video shows a Mopar powered engine combined with the clutch-less Lenco Transmission that produces over 850 real Mopar horsepower!!! Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 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 servos are machined from billet alum. Please click here for CS3 Timing Chart (.pdf). 1.405%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. This will allow for free play in the shift system. 3. Run the air servo jam nut and o-ring up the threads on the servo. Throwout bearing collar (4 & 5-speed only). 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. Final drive ratio is 1:1. Then start the tires spinning, now shift the front section so that you are now in high gear. His dial-in time is 10.60 and his ET for this race was a 10.61. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the LENCODRIVE is 100% LENCO and will handle 2500 HP with ease. Enough to make the run and turnoff before it releases. 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. Light weight ring gears (units w/27 and 32 spline shafts only). Porsche 911-06 side shift transmission for 914 4 or 6. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. 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. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Remove fill plug on top the transmission case you are going to adjust. 1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. The total amount of gear reduction depends on the amount of housings and the overall application of the transmission. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodriveis 100% Lenco. We acheive more than two speeds by combining multiple cases. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. Each lever controls one planetary gear set. The arm is held into the servo piston by a set screw. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. If needed you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired. 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. The ST1200 gives you the advantage of Lenco brute strengthat a lesser price than our full race units. As with the CS1 Standard Design, the New Generation CS2, CS3 and CS4 can be shifted by lever or our CO2 system. all hardware. Reverse is a small black lever. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. View the whole process and start at the beginning. 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. We got to ride along in an ST1200 equipped car, and what a monster of a car it was. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. 1. Gary Sumek of Lenco mentioned that they have been producing a five-speed street version for a few years. The ring gear is then pressed inside of the bearing. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. The rear case a 1.31 ratio gearset. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. Lencodrive 4 Speed. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Simply put, once the transmission is in gear, the power runs through a set of planetary gears. Each sun and planet gearset represents two speeds. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Once determined, these gear configurations are assembled in their planetary carriers. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. Gear Ratio Reducer
Shift with either our patented. 1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. The tallest to the right is used to shift the transmission from first to second gear. The simplicity also makes them easy to repair if something goes wrong . Polishing the shift fork helps a lot for consistent shifts. 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. When locked, the gear's ratio is translated to the output shaft as the gear and the output shaft are now fixed. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. The sun gear is the center of the mechanism's universe. 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. There are a variety of both manual and CO2 servo tower designs. 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
Once installed, make sure the air servo is loose and can turn freely. The second lever, and second tallest, is used for third gear. Burnout's (on all LENCOS): They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. Adjustment: Choice of standard or new generation reverses. Lenco Racing, the all time champion and undisputed leader in the drag racing. When the installed lever is loose that section is in low and when the lever is tight the sections in high. 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. 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. Tags: 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. Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. Sight through plug hole, where you will see the outer edge of the rotary shift plate. It's capacity is much stronger than the small sprag. the shift pressure to maintain desired wheel speed and traction. 3 speed. All LENCO transmissions can be shifted with levers or a CO2 system. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. 1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear. Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. The Lenco Racing ST1200 4 Speed Transmission has been specifically designed and engineered for severe duty street/strip applications. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. This is first gear. The middle case would also contain a 1.37 planet gear set. Although the initial cost is more than a well-built TH400, the longer durability and low-maintenance cost of the Lenco will pay for itself in the long run. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. This is what comes standard in most new LENCO transmissions. Air servos are specific to the type of Lenco you run so be sure to pick the correct one from the drop down menu. CS2, CS3, CS4 & Lencodrive or offset shift transmissions:
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