Lencodrive 3 Speed. 1. jody - even though i don't run a lencodrive and i have 2 bruno/lencos, i believe i can highlite some differences. This L.. Purchase the complete LENCO bell housing assembly or individual bellhousing components as needed. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. 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. The middle case would also contain a 1.37 planet gear set. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. Each lever controls one planetary gear set. 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. 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. 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 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. When doing burnout's you need to roll up to the water box then shift all sections accept the front section. Thus a 1:1 ratio is achieved. Pressure set-up kit Our shift pressure set-up kit consists of a separate adjustment tower, lever, pull scale and chart of recommended pressures. I use an electric over air setup to shift my new B and J transmission. 1.31%Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. The tallest to the right is used to shift the transmission from first to second gear. This will allow for free play in the shift system. 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. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life. We can supply practica.. Lenco Racingthrowout bearing collars are machined from premium aircraft grade billet aluminum .. This intermediate shaft connects this planetary gear set to subsequent planetary gear sets which make up the modular nature of this transmission. The result is LENCO quality and durability at a reasonable "Street Machine" price. The rear case a 1.31 ratio gearset. 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. You always need to come out of the water box in high gear to prolong the life of the transmission. You may choose any conventional input shaft spline. 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. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. In the example of a four speed, the case nearest the engine would 1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear. Low drag (angluar contact and needle bearings). 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. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. 1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth 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. Reverse is handled by a reverser section that is attached to the rear of the transmission. Remove fill plug on top the transmission case you are going to adjust. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. Competition Eliminator, Super classes, Top Dragster and Pro Stock cars are typical classes where you will find the New Generation LENCO. A perfect replacement for expensive breakage prone Powerglides, Turbos, C4, C6 style and Torqueflite transmissions the Lencodrive is 100% Lenco. Skilled drivers can perform a clutchless shift without hurting their transmission, but it does take a little bit of a learning curve to get there. This is a very extreme duty sprag assembly. Available in single o.. Lenco couplers are machined from 8620 aircraft quality steel and heat treated for for severe duty se.. RATIO CHART All transmissions work by using gear ratios to transfer power to the rear wheels. 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. Every track differs from day to day or hour to hour. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Watch it while someone pushes the shifter button. The arm is held into the servo piston by a set screw. Final drive ratio is 1:1. The CS-2 is much easier to work on than the CS-1. New and Used Parts Lenco downshifting - YouTube Lever or CO2 shift. automatic, 1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. If the first 300 feet of track is excellent, for instance, full shift pressure and instant lock-up may be desired. Other refinements are O-ring seals that replaced the the gasket seals between the transmission casings. No further adjustments are necessary as there is ample reserve travel in the servo. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. 1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear. The ST1200 also utilizes aircraft quality bearings where the pure-race CS2 uses aerospace spec components. 1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Air or lever shift. up to the CO2 configuration or vice versa. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. We acheive more than two speeds by combining multiple cases. 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. The possible combinations are endless! Glazed, burned and chipped discs must also be replaced immediately. 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. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. 1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. drag racing, When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. Equipped with a Lenco ST1200 5-speed transmission, Jeff regularly drives his car on the streets around his home in Oceanside, CA. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. It also allowed Lenco to shave as much weight as possible from the finished part. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Thus a 1:1 ratio is achieved. 1.38%Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear. CS2, CS3, CS4 & Lencodrive or offset shift transmissions: LENCODRIVE Automatic When this occurs, the ring gear becomes the dominant gear1:1 (final drive ratio). Air or manual shift. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Tags: 4-Speed $9,830. The 4-speed above shows how to determine drive ratios. Lenco transmissions essentially combine the best of a manual and automatic transmission into one unit. They work by using a sun gear that is also attached to a sprag clutch, three planet gears, and a ring gear. Take the Hurst Lightning Rods, an aftermarket performance shifter marketed in the 1980s. 1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. This is what comes standard in most new LENCO transmissions. - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. Run the air servo jam nut and o-ring up the threads on the servo. 1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear. Copyright 2020, Lenco Racing. Since each case contains one gearset and provides both underdrive and direct drive,multiple cases (gearsets) provide multiple underdrive ratios. 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). As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. The ST1200 gives you the advantage of Lenco brute strengthat a lesser price than our full race units. 1.20%Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Lenco Transmissions Tech | www.darkside.ca lntroduced in 1972 as a 2-speed the Standard Design LENCO is our largest and strongest transmission. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. 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. Stay up to date with news and promotions by signing up for our monthlly newsletter. Lenco Parts and Price List isavailable here. 1.44% - Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear. This is not possible with a traditional cluster gear transmission. lencodrive, 1.28%Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 1.56%Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear. I've made provision, so that shift lever can be moved to the back of the trans quite easily. Air shifted LENCOS come pre adjusted from the factory. The Lencodrive will accept virtually any manufacturer's torque converter. 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. The three speed is approximately 135 lbs. necessary hardware. Magnesium Case. This is our double large sprag assembly and is used primarily in the boat applications, but has found its way into some car applications. Additionally, the Lencodrive's main valve body is machined from billet components and is not the typically modified OEM Detroit component. 1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. In order to achieve an underdrive first gear launch ratio the LENCO transmission relies on planet gears which rotate around the sun 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. 1.20%Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear. Changing gears and setting it up is the same for the CS-2 and the Lencodrive. Lenco offers an extensive variety of transmissions. .. All Lenco coupler clamps are machined from 7075 aircraft grade aluminum. the shift pressure to maintain desired wheel speed and traction. 1.68%Uses 15 tooth planet gears, a 62 tooth sun gear and 91 tooth ring gear. Hurst's inspiration for the Lightning Rods was the Lenco transmission (above) used in drag racing in those years, notably in the NHRA Pro Stock category. The ST1200 allows Jeff to control how hard his transmission shifts by changing how fast he pulls on the levers. Lencodrive Options: (option pricing only). Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. All ST1200 Street units now come with low drag bearings and a billet case. Material Gears. 3. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. 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. 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. A five speed requires four cases, and a six speed requires five cases. transmission, We acheive more than two speeds by combining multiple cases. Boat Transmissions and Boat Clutches Warning: Do Not over tighten set screw. Sight through plug hole, where you will see the outer edge of the rotary shift plate. 1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. In all instances the transmission is then shifted to a 1:1 direct drive ratio by depression 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. Shifters and lockouts can be either style. Air or lever shift. What does this mean, you wonder? 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. Once determined, these gear configurations are assembled in their planetary carriers. 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. Since all LENCO transmissions utilize the same internal gearing design you can easily change from a manual shift set All three units shifted equal final drive ratio of 1:1. The counter shaft has fixed associating gears that are permanently meshed with the loosely connected gears on the output shaft. 1.24%Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear. and control slippage. Lencodrives is a CS-2 transmission. word-day-lightning-rods | News | Grassroots Motorsports No further adjustments are necessary as there is ample reserve travel in the servo. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. In the example of a four-speed, the case nearest the engine would contain a 1.37 ratio planet gear set. 150 is the usual middle starting point. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . The boat clutch provides gentle engagement and disengagement. 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. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. All Rights Reserved. 1.19%Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. 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 Yes, there are 18 different car gearbox types - MSN 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. Add bellhousing depth to above lengths for total length: Lenco aluminum, Titanium or Browell steel: 7.200". The gearset in the third case alone, 1.31:1, determines the third gear ratio. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. In general, all LENCO transmissions are a planetary design. When the installed lever is loose that section is in low and when the lever is tight the sections in high. Lenco, the all time champion and undisputed leader in the drag racing transmissions. This synchronizing gear is pushed onto the teeth of one of the two drive gears that it sits in-between, matching its speed and locking it into place. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Clutchless shifting is the practice of changing or shifting your gear without touching the left bar lever. 1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear. 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. Lenco Air Shift Servo CS-1/CS-2/CS-3 - RBS Superchargers This action compresses an internal clutch pack which results in a final driveratio of 1:1. The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. Assemble next section on to case and bolt tight. Shift pressure is adjustable, whether it be for one case, all cases or anindividual case in a multiple case configuration. - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. Every track differs from day to day or hour to hour. 1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear. Copyright 2020, Lenco Racing. at a lesser price than our full race units. Again, in an effort to increase fuel economy, Vipers ship with tall 3.07:1 final drive ratios. Charlotte , NC. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. As with the CS1 Standard Design, the New Generation CS2, CS3 and CS4 can be shifted by lever or our CO2 system. Lenco, the all time champion and undisputed leader in the drag racing transmissions. The next lever is used for fourth gear and final lever for fifth. 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. Remove fill plug on top the transmission case you are going to adjust. Ourblue,greenandtandisc are supplied new at approximately .058"- .061" thickness. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. 1.22%Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. First you need to determine which style clutch packs you are working onsee chart. It's capacity is much stronger than the small sprag. The arm is held into the servo piston by a set screw. EASY SHIFTING with David Sumek | David answers a few FAQ on - Facebook 1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. the sun gear from rotating in one direction. If you want to go straight to the action, skip to around 2:20. The ST1200 comes with aluminum cases instead of the magnesium style race units. Large Strips and Clips Sprag Assembly - Thisis a specialized sprag and is used in applications where tire shake is a constant problem. Copyright 2020, Lenco Racing. In order to achieve an underdrive first gear ratio the LENCO transmission relys on planet gears which rotate around the previously mentioned sun gear. Since the taller ring and pinion have more tooth area contact they are more reliable and less prone to breakage. When discs wear to .052" or less they must be replaced. 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 CS1, CS2, CS3 and CS4 transmissions provide the perfect solution for harnessing the unique HP and torque output of boat engines. 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]. All transmissions, once assembled, have to be installed in a car. Since the 30 wt oil is thicker it takes a . The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people wh.. 1.41%Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. The arm must be free to move in all directions. 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. Both transmissions are available in 2,3, 4 or 5 speeds. racing transmission, 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. We offer Turbo 400, C6, Mega and standard Powerglide size input shafts per your requirements. Gears attached to the output shaft are loosely connected. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. This will allow for free play in the shift system. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. The Lencodrive is pure Lenco through-and-through with the same gearset components as our CS2. With a simple shift pressure adjustment you can easily compensate. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 300M Input/Cluster Shafts. The shifting process removes multiplication factors and subsequently results in all gear-sets, after Going to high on the pressure shocks the transmission and drive-train. 1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring 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. Attach air lines and your race ready. Choice of output shaft length and spline. The LENCODRIVE is the automatic answer for people who prefer torque converter/automatic transmission applications. Burnout's (on all LENCOS): Th.. The shift lever is almost the same height as the standard 5th gear lever. Shims before and after the shifter plate assembly -. 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. Each gear is engaged by pulling down on the shift lever, to activate the clutch mechanism for each gear set. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. All Rights Reserved. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Sight through plug hole, where you will see the outer edge of the rotary shift plate. 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. The Lencodrive is the shortest and lightest torque converter driven transmission available anywhere. INSTALLATION 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. The planet gears are driven by an encompassrng flng gear. Jeff says that he loves the transmission and "the only thing different [from driving a traditional gearbox] is that there is no engine braking". 1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. All LENCO transmissions can be shifted with levers or a CO2 system. A large sprag clutch is attached on to the sun gear of the planetary carrier finishing the transmission section. There is also a blue disc and a tan disc both of these styles come in one size. All shifting is done with the engine's clutch engaged. Lenco drive clutch question | InsideTopAlcohol Lenco Transmissions Tech. e30 m52 turbo. <lol> Trust me, It's no where near shoulder height ! Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Multiple speeds are achieved through utilization of multiple cases. Run the air servo jam nut and o-ring up the threads on the servo. If, however, the track is loose from 300 through 500 you can soften Lencodrive 3 Speed and Reverse | Lenco This is a very extreme duty sprag assembly. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. Lencodrive - Lenco Racing Transmissions This means that it can run for years without any maintenance and still operate smoothly. Shown with our boat bellhousing. custom vertical gate shifter, push button downshifting. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Lenco revamped the ST1200, by replacing sand molds with CNC 5 and 6-axis milling machines. shift pressure control. 1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Large low drag bearings, that the planetary gears will float on, are pressed into the casings. Assemble next section on to case and bolt tight. 1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. 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. With a simple shift pressure adjustment you can easily compensate 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. 1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. The truck runs a big-block Chevy that makes 1,100 horsepower on pump gas and lots of nitrous oxide. For additional information about Lenco products please email us here, or call us at (909) 673-9080. 1.29, 1.35, and 1.41 gear ratios have been added making a larger list of eight selectable gear ratios. 1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 1.313%Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. The sun gear is the center of the mechanism's universe. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Unlike a traditional manual transmission with its singe shifter, planetary transmissions have multiple levers which are used to shift the transmission. 1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear. Shifters - Lenco Racing Transmissions Lencodrive 4 Speed. All cases are magnesium. 3 Speed with single brg and std output: 23.375". A first-to-fourth skip-shift solenoid is used on the transmission to help increase fuel economy. 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. Planetary gear sets have two speeds. Lenco Street Transmissions - Super Chevy Magazine - MotorTrend Going to low on the pressure you get lazy shifts and faster transmission clutch wear requiring frequent changes. 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.