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. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the. 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 the example of a four speed, the case nearest the engine would The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people who have asked for a safe and affordable torque converter driven transmission. Now taking all the lash out by lifting up on the clutch housing (outer housing) and press down on the pressure plate then measure the distance between the top of the pressure and the bottom of the snap ring groove of the clutch housing, This is your clutch pack clearance. Additionally, the Lencodrive's main valve body is machined from billet components and is not the typically modified OEM Detroit component. lenco cs3 5 speed. 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. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. Once determined, these gear configurations are assembled in their planetary carriers. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 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. Warning: Do Not over tighten set screw. The rear case a 1.31 ratio gearset. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Shift pressure is adjustable, whether it be for one case, all cases or anindividual case in a multiple case configuration. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. The gearset in the third case alone, 1.31:1, determines the third gear ratio. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. You can expand to 3 or 4 speeds by addition of additional cases. 1.16%Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. 1.44%Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. The power is passed straight through from one planetary gear set into the next gear set and the process repeats again. LENCO transmissions are a planetary design. The Lenco Racinggear reduction unit, when used in conjunction with our CS1, CS2, CS3, or CS4 t.. Lenco Racingmachines our input shafts from 300M and Marage stock. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. 1.378% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. 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. When locked, the gear's ratio is translated to the output shaft as the gear and the output shaft are now fixed. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Race prepped Hydramatic. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. 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. and anodized for corrosion and galling protection. sr1200, Furthermore the Lenco allows you to achieve 3,000-rpm launches at the track and 1,000-rpm take-offs from the stoplight, depending on how long you leave your foot on the clutch. Pressure set-up kit Our shift pressure set-up kit consists of a separate adjustment tower, lever, pull scale and chart of recommended pressures. When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). Lever or CO2 shift. With a simple shift pressure adjustment you can easily compensate
The original transmission was and is still a bulletproof transmission for the street/strip crowd. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Reverse lever. All Rights Reserved. For example, a three speed requires two cases. Choice of output shaft length and spline. 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. By multiplying thesethree ratios you come up with a 2.46 first gear ratio. 1.256%Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. Air or lever shift. 1.68% - Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. Run the air servo jam nut and o-ring up the threads on the servo. The planet gears are driven by an encompassrng flng gear. The simplicity also makes them easy to repair if something goes wrong . Please click here for CS3 Timing Chart (.pdf). 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. 1.405%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. LENCO racing transmission is a smaller, lighter and more compact version of our CS1 Standard Design. Add fluids as necessary and install fill plug. racing transmission, e30 m52 turbo. Second gear ratio is 1.80 and third gear is a 1.31 ratio. The planet gears are driven by an encompassing ring gear. the final shift, being locked to a 1:1 ratio. 300M Input/Cluster Shafts. Lenco transmissions were first made popular in the early '70s when NHRA Pro Stockers needed a gearbox that was up to the task of 9-second elapsed times. Shift with either our patentedmulti lever system or with the optional, more compact CO2 setup. This L.. Purchase the complete LENCO bell housing assembly or individual bellhousing components as needed. If, however, the track is loose from 300 through 500 you can soften
3 speed. drag racing, Screw the servo into the transmission case until contact is made with the shift fork pin. With its modular design, an infinite number of speeds can be added. 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. 1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Air or Lever Shift. It was . Then start the tires spinning, now shift the front section so that you are now in high gear. 1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear. Equipped with a Lenco ST1200 5-speed transmission, Jeff regularly drives his car on the streets around his home in Oceanside, CA. 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. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. 1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear. In all instances you will require a LENCO reverse unit to achieve reverse movement. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. Gears attached to the output shaft are loosely connected. Air shifted LENCOS come pre adjusted from the factory. When discs wear to .052" or less they must be replaced. <lol> Trust me, It's no where near shoulder height ! 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. Attach air lines and your race ready. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 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. The truck runs a big-block Chevy that makes 1,100 horsepower on pump gas and lots of nitrous oxide. It also allowed Lenco to shave as much weight as possible from the finished part. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Th.. Lencodrive Options: (option pricing only). They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. contain a 1.37 ratio planet gear set. 1.500% Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. 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. 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. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. It has a selected gear ratio, and is the first speed of the transmission that is translated to the output shaft that drives the wheels. What kind of clutch you run is a big factor. 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. Thus a 1:1 ratio is achieved. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. Th.. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. 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. Operation of a Lenco is fairly straight-forward: When it's time to shift gears, simply pull the appropriate lever, with each gear having its own stick. The arm must be free to move in all directions. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth 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. Then, continue to screw air servo Out (counter-clockwise) one half turn. As with all LENCO transmissions a separate reverse unit is employed. If you want to go straight to the action, skip to around 2:20. Ourblue,greenandtandisc are supplied new at approximately .058"- .061" thickness. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. 1.378%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. The total amount of gear reduction depends on the amount of housings and the overall application of the transmission.
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