The 1 1/4 is the best and used in Top Alcohol and Pro Mod. Magnesium cases are used for both the CS2, CS3 and CS4. Reverse is handled by a reverser section that is attached to the rear of the transmission. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft. Lenco, the all time champion and undisputed leader in the drag racing transmissions. <lol> Trust me, It's no where near shoulder height ! 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. 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. Going to high on the pressure shocks the transmission and drive-train. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. 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. The three speed is approximately 135 lbs. The CS1 Standard Design LENCO is recommended for the most severe applications and is capable of repeatable consistency with a minimum of maintenance. 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. This is an in-car shot video of Mike drag racing his 73 Duster using a clutch-less Lenco Transmission. ln general, all Lenco transmissions are a planetary design. Likes Received: 180. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Copyright 2020, Lenco Racing. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. This change cut down weight substantially which added to the overall rotational mass reduction. Attach air lines and your race ready. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. With its modular design, an infinite number of speeds can be added. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. Each sun and planet gearset provides two speeds. of the adjustable shift tower plunger. The arm is held into the servo piston by a set screw. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. The original ST1200 came with a cast aluminum case, gasket seals, and a range of selectable gear ratios. All transmissions, once assembled, have to be installed in a car. The second lever, and second tallest, is used for third gear. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. LENCO transmissions are a planetary design. The hard-anodized finish is meant to thrive in that environment, requiring no more than a quick wipe down with a damp rag, whereas the bare aluminum transmission would need more work to get it sparkling again. Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. Jeff says that it took him about two weeks to get used to the multi-lever shifter. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. The tallest to the right is used to shift the transmission from first to second gear. 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. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. 1.280%Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. Assemble next section on to case and bolt tight. 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. 1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear. ST1200 Street Strip The sections are joined by a sprag clutch that restricts rotation of the sun gear to one direction. What does this mean, you wonder? e30 m52 turbo. Add bellhousing depth to above lengths for total length: Lenco aluminum, Titanium or Browell steel: 7.200". 1.378%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. You may choose any conventional input shaft spline. The tallest to the right is used to shift the transmission from first to second gear. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. 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. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodrive is 100% Lenco. Equipped with a Lenco ST1200 5-speed transmission, Jeff regularly drives his car on the streets around his home in Oceanside, CA. Air servos or max-adjust shift towers. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. The next lever is used for fourth gear and final lever for fifth. bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. (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. I use an electric over air setup to shift my new B and J transmission. The choice is yours. 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. Most popular with Sand Dragsters, Mud racers and Modified pullers. This is not possible with a traditional cluster gear transmission. There is also a blue disc and a tan disc both of these styles come in one size. If the shift pressure is set to your application lock the jam nut your finished, if not you then need to add shim to raise pressure or subtract shim to reduce pressure. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Shifters and lockouts can be either style. Air or manual shift. Air shifted LENCOS come pre adjusted from the factory. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. The internal action of a LENCO is such that when the transmission is in first gear the chosen planet gear assembly provides the launch ratio. The final section is the reverser. - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. 1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. the final shift, being locked to a 1:1 ratio. 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. 1.21%Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. It is also 2-lbs lighter for lower rotational mass which translates to quicker acceleration. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. This means that it can run for years without any maintenance and still operate smoothly. Gary Sumek of Lenco mentioned that they have been producing a five-speed street version for a few years. Lenco's transmissions can either be manually shifted or gas shifted with CO2. What kind of clutch you run is a big factor. The ring gear is then pressed inside of the bearing. Warning: Do Not over tighten set screw. 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. It's capacity is much stronger than the small sprag. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio. Shims before and after the shifter plate assembly -. If needed you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired. As with all LENCO transmissions a separate reverse unit is employed. Lencodrive 2 Speed. You must multiply each case's underdrive ratio in order to determine the first gear ratio. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. 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. We do offer different thickness floaters for correcting the clutch pack clearance. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. 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. 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. In general, all LENCO transmissions are a planetary design. 9310 steel would be used in Pro Stock, Pro Mod and other similar applications where substantially more HP, torque and tire plant is generated. Smaller diameter and shorter length make this transmission a practical choice for use in restricted confines and instances when you have limited distance from the engine to the rear end. Lenco Parts and Price List isavailable here. 4 speed. The dual clutch manual transmission is simply fast. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. 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. All LENCO transmissions can be shifted with levers or a CO2 system. You will need to add a LENCO reverse unit in order to back up. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Shafts are available in Marage or 300M material.16 or 32 spline. The Lenco Racing Lencodrive is the automatic answer for people who prefer torque converter/automatic transmission applications. Air servos are specific to the type of Lenco you run so be sure to pick the correct one from the drop down menu. 1.313% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. Its used to force the gear set to make ratio by preventingthe sun gear from rotating in one direction. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Stay up to date with news and promotions by signing up for our monthlly newsletter. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. Pressure set-up kit Our shift pressure set-up kit consists of a separate adjustment tower, lever, pull scale and chart of recommended pressures. Choice of ratio. Stay up to date with news and promotions by signing up for our monthlly newsletter. Add fluids as necessary and install fill plug. drag racing, Shift with either our patented multi lever system or with the . A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. No alterations to the transmission, other than the external operating system itself, are required. Aside from manufacturing benefits, it also gives customers a finished piece that looks more like jewelry than an automotive part. The middle case would also contain a 1.37 planet gear set. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Pistol Grip Manual Shifter. Since internal combustion engines have a short torque band, we utilize transmissions to change the speed that the wheels spin by either using larger or shorter gear ratios. We acheive more than two speeds by combining multiple cases. 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. Thus a 1:1 ratio is achieved. Tags: 1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Lenco Racing, the all time champion and undisputed leader in the drag racing. A G-force or Liberty face plated 4 speed may be what you want. When you select a gear, the gear shaft moves a synchronizing gear that looks like a toothed collar. - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 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. 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. the shift pressure to maintain desired wheel speed and traction. 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. Stay up to date with news and promotions by signing up for our monthlly newsletter. Add fluids as necessary and install fill plug. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Boat Transmissions and Boat Clutches The CS1 planetary gear size is 1". Reverse is a small black lever. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.356%Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. 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]. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. This will allow for free play in the shift system. Sight through plug hole, where you will see the outer edge of the rotary shift plate. 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. Adjustment: 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. Purpose designed and produced for drag, ski and river boat requirements. 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. Apply a small amount of Red (271) Locktite on the set screw. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. A BorgWarner T56 six-speed transmission was used in the Viper; automatics have never been available. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. Unlike a traditional manual transmission with its singe shifter, planetary transmissions have multiple levers which are used to shift the transmission. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set Enough to make the run and turnoff before it releases. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. Polishing the shift fork helps a lot for consistent shifts. Glazed, burned and chipped discs must also be replaced immediately. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed case. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. 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. Air or Lever Shift. 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 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, R577980 Raybestos Gen2 (Blue) A five speed requires four cases, and a six speed requires five cases. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. John, put a pressure guage at the shifter pod. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. Please click here for CS3 Timing Chart (.pdf). Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Clutchless shifting is the practice of changing or shifting your gear without touching the left bar lever. 1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. 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. The planet gears are driven by an encompassing ring gear. If you want to go straight to the action, skip to around 2:20. The planet gears are driven by an encompassing ring gear. All transmissions work by using gear ratios to transfer power to the rear wheels. 1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. 1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 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. Second gear ratio is 1.80 and third gear is a 1.31 ratio. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring 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. 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. Once engaged, the gears are shifted without a clutch. The ST1200 is available with all popularbellhousing patterns - Ford, GM, MoPar and our own five-bolt design. 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. All shifting is done with the engine's clutch engaged. racing transmission, Thus a 1:1 ratio is achieved. Screw the servo into the transmission case until contact is made with the shift fork pin. Copyright 2020, Lenco Racing. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. All Rights Reserved. Both transmissions are available in 2,3, 4 or 5 speeds. Then start the tires spinning, now shift the front section so that you are now in high gear. CS2, CS3, CS4 & Lencodrive or offset shift transmissions: Light weight ring gears (units w/27 and 32 spline shafts only). Lenco, the all time champion and undisputed leader in the drag racing transmissions. Its used to force the gear set to make it's ratio by preventing the sun gear from rotating in one direction. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. Each gear is engaged by pulling down on the shift lever, to activate the clutch mechanism for each gear set. 1.25%(Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 tooth ring gear. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. all hardware. 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.
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