how to shift a lenco transmission

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. 1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. Shift Patterns: 3 Speed + reverser with Pro output: 25.000". Air or lever shift. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. and anodized for corrosion and galling protection. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Screw the servo into the transmission case until contact is made with the shift fork pin. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. 1.25%(Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 tooth ring gear. All three units shifted equal final drive ratio of 1:1. The boat clutch provides gentle engagement and disengagement. All Rights Reserved. I purchased the trans disassembled and do not have the shim configuration shown in the drawing. 2 Speed with single brg and std output: 16.875". contain a 1.37 ratio planet gear set. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. A typical lever shift assembly Consists of hand levers, activation rods, detent levers, rod towers, adjustment nuts, clevises, heim ends, friction washers, mounting bracket and all Remember that each separate case contains it own The Lencodrives come with three different shafts, a Ford, a GM, and a 1 1/4. Lenco offers an extensive variety of transmissions. Take the Hurst Lightning Rods, an aftermarket performance shifter marketed in the 1980s. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. Copyright 2020, Lenco Racing. 1.405%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. Screw air servo in (clockwise) until you see the rotary plate start to shift, now screw air servo Out (counter-clockwise) until the rotary shift plate stops moving. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. The next lever is used for fourth gear and final lever for fifth. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. The shifting process removes multiplication factors and subsequently results in all gear-sets, after ST1200 Street Strip 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. The lever arms also vary in length. Lenco Parts and Price List isavailable here. In the Lenco, the shift lever actually moves the clutch pack together to engage the gear in each housing. Lever or CO2 shift. Typically the CS-1 and CS-3 run the 2.50" piston air servo (150 psi) and the CS-2 and Lenco drive runs the 3.00" piston (250 psi). First you need to determine which style clutch packs you are working onsee chart. Engineered to handle 3500+ HP the Standard Design LENCO is available with up to 5 speeds and comes in a cast magnesium case. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. No alterations to the transmission, other than the external operating system itself, are required. 5-Speed $10,660. The rear case a 1.31 ratio gearset. Burnout's (on all LENCOS): The second lever, and second tallest, is used for third gear. Reverse is a small black lever. When other gears are selected the synchronizer is placed back in the center of the gear and another synchronizer is activated, repeating the same sliding, matching, and locking maneuver to another set of drive gears. In the example of a four speed, the case nearest the engine would contain a 1.37 ratioplanet gear set. 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. The middle case would also contain a 1.37 planet gear set. Recommended for cars making up to 1200 HP the ST1200 is pure LENCO through and through. 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. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Traditional manual transmissions consist of at least two linear shafts: an inline input and output shaft, and a counter shaft. Magnesium cases are used for both the CS2, CS3 and CS4. Or maybe simply a T56 magnum is all you need. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. This change cut down weight substantially which added to the overall rotational mass reduction. Lencodrive 2 Speed. the sun gear from rotating in one direction. 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. LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. For additional information about Lenco products please email us here, or call us at (909) 673-9080. You always need to come out of the water box in high gear to prolong the life of the transmission. The CS-2 is much easier to work on than the CS-1. 1.25%(Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Going to high on the pressure shocks the transmission and drive-train. Those two speeds are (1) the lower underdrive ratio and (2) the direct'1:1 final lock-up drive ratio. Planetary gear sets have two speeds. 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. This in-car shot video shows a Mopar powered engine combined with the clutch-less Lenco Transmission that produces over 850 real Mopar horsepower!!! As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Second gear ratio is 1.80 and third gear is a 1.31 ratio. The second lever, and second tallest, is used for third gear. Sight through plug hole, where you will see the outer edge of the rotary shift plate. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. The final section is the reverser. The CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. Final drive ratio is 1:1. The position of the shift lever is relative to the application. Competition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. Add fluids as necessary and install fill plug. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. I've mounted it where It's most comfortable for me. 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. Then, continue to screw air servo Out (counter-clockwise) one half turn. I shift it with a timed switch getting its signal from an electric shifter box so that it applies voltage for 17 sec at the shift. In general, all LENCO transmissions are a planetary design. The planetary carrier that is holding the sun gear and planetary gears and clutch pack is placed inside the ring gear. Lenco Parts and Price List isavailable here. The middle case would also contain a 1.37 planet gear set. A five speed requires four cases, and a six speed requires five cases. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodrive is 100% Lenco. $3,200. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. It only has two moving parts, the belt itself and a shaft that connects it to other components in the vehicle or machine. See(input diagram). Pistol Grip Manual Shifter. Engineered for 1200 HP. Most popular with Sand Dragsters, Mud racers and Modified pullers. RATIO CHART Screw air servo in (clockwise) until you see the rotary plate start to shift, now screw air servo Out (counter-clockwise) until the rotary shift plate stops moving. 1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear. and control slippage. Likes Received: 180. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. This is what comes standard in most new LENCO transmissions. Assemble next section on to case and bolt tight. The first gear set is multiplied by the next, which is multiplied by any subsequent gears sets to eventually reach the final drive ratio of 1:1 where the output shaft is spinning as fast as the input shaft (or overdrive which is any ratio lower than 1 like .85:1). Going to low on the pressure you get lazy shifts and faster transmission clutch wear requiring frequent changes. Magnesium Tailhousing (Bushing or Roller Bearing) 300M 32-Spline Output Shaft. Air or Lever Shift. Stay up to date with news and promotions by signing up for our monthlly newsletter. You will need to add a LENCO reverse unit in order to back up. Lencodrive Options: (option pricing only). 1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. The planet gears are driven by an encompassrng flng gear. So, a transmission may have a first gear ratio of 2.47, a second gear ratio of 1.80, a third of 1.31, as the transmission works its way down to its final drive ratio of 1:1 where the output shaft that drives the wheels is spinning as fast as the input shaft which is attached to the motor. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. 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. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear. 1.297% Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear. street transmission, Warning: Do Not over tighten set screw. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. There are a lot of variables. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. Gear Ratio Reducer First gear is the furthest lever from the driver with higher gears being the nearest levers. 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. The arm is held into the servo piston by a set screw. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Lenco Transmissions utilize several different styles of clutch discs and depending of which style lenco you have you will also find different clutch counts in each case. Once installed, make sure the air servo is loose and can turn freely. Since the 30 wt oil is thicker it takes a . 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. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. It also allowed Lenco to shave as much weight as possible from the finished part. Lenco, the all time champion and undisputed leader in the drag racing transmissions. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. A large ring gear surrounds the entire solar system of gears. All levers in forward position result in the transmission being in first gear. There are two different size air servos for the New Generation transmissions. 1. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. Shift with either our patented. The rear case a 1.31 ratio gearset. 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. Add bellhousing depth to above lengths for total length: Lenco aluminum, Titanium or Browell steel: 7.200". For example, a three speed requires two cases. The 4-speed above shows how to determine drive ratios. Add fluids as necessary and install fill plug. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. custom vertical gate shifter, push button downshifting. Second gear ratio is 1.80 and third gear is a 1.31 ratio. This can cause tire shake. Charlotte , NC. Screw air servo into case until it bottoms out against the jam nut. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Tags: Each lever controls one planetary gear set. 3. The LENCO ST1200 is the answer for Pro Street and street/strip applications. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. 1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. You may choose any conventional input shaft spline. Each case in succession. All Rights Reserved. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. By multiplying these three ratios you come up with a 2.46 first gear ratio. Apply a small amount of Red (271) Locktite on the set screw. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. When you select a gear, the gear shaft moves a synchronizing gear that looks like a toothed collar. 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. Every track differs from day to day or hour to hour. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. Attach air lines and your race ready. 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. When you shift into second gear a lockout happens which "locks" the sun gear, three planet gears, and the ring gear together so that they all spin in unison. 1.41%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. This action compresses an internal clutch pack which results in a final driveratio of 1:1. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. In general, all LENCO transmissions are a planetary design. The tallest to the right is used to shift the transmission from first to second gear. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. Final drive ratio is 1:1. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. You always need to come out of the water box in high gear to prolong the life of the transmission. The arm is held into the servo piston by a set screw. The Lencodrive does not require a containment blanket unless you use a supercharger or alternative fuels. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. If you want to go straight to the action, skip to around 2:20. 3 Speed + reverser with Std output: 24.000". 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Each LENCO transmission is thus a two-speed and is housed in its single dedicated case. Adjustment: of the adjustable shift tower plunger. 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. If a sun gear to ring gear has a ratio of 1.44, then the intermediate shaft that is attached to the planetary carrier is spinning at a 1.44 reduction in relation to the input shaft. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. 3 Speed with single brg and std output: 23.375". 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. CS-1 style or center shift transmissions: You achieve more than two speeds by combining multiple casesFor 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 ring gear is then pressed inside of the bearing. 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. Th.. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. 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. You must multiply each cases underdrive ratio in order to determine the first gear ratio. I do have three .080" shims, two .017" and six .027" shims. 1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear.
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