how to shift a lenco transmission

1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear. Throwout bearing collar (4 & 5-speed only). As with the CS1 Standard Design, the New Generation CS2, CS3 and CS4 can be shifted by lever or our CO2 system. Take the Hurst Lightning Rods, an aftermarket performance shifter marketed in the 1980s. Its used to force the gear set to make ratio by preventingthe sun gear from rotating in one direction. 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. When setting up your clutch packs they need to have the proper air gap or clutch pack clearance. at a lesser price than our full race units. 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]. The CS2 handles up to 3000 HP; CS3 and CS4 1800 HP. Also, a hp/tq rating on a transmission does not mean it will actually hold that much. There are a lot of variables. One variation is that the ST1200 uses budget-friendly 8620 alloy for the gears instead of the more expensive 9310 material. Enough to make the run and turnoff before it releases. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. 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. Different Sizes -LENCO utilizes several different styles and sizes of sprags depending on which application the transmission is used for. 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. .. All Lenco coupler clamps are machined from 7075 aircraft grade aluminum. The original transmission was and is still a bulletproof transmission for the street/strip crowd. <lol> Trust me, It's no where near shoulder height ! Proving itself to be a dependable and excellent option that fits with the blending of racing and street-driven cars, the dual clutch transmission has taken manual transmission performance to a whole new level. 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 . 1.479%Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear. 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. 1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. Porsche 911-06 side shift transmission for 914 4 or 6. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. Assemble next section on to case and bolt tight. 3/4" Gear Set. Available in single o.. Lenco couplers are machined from 8620 aircraft quality steel and heat treated for for severe duty se.. Tags: 1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. 1.356%Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear. The ring gear is then pressed inside of the bearing. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. CS1 Standard Design 1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed case. A G-force or Liberty face plated 4 speed may be what you want. If you want to go straight to the action, skip to around 2:20. 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. A five speed requires four cases, and a six speed requires five cases. (only on CS-1 style or center shift transmissions): Air shifted LENCOS come pre adjusted from the factory. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation. 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. 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. If you want to go straight to the action, skip to around 2:20. The LENCO gear reduction unit - with a range of 31% to 56%-helps get you off the starting line. lntroduced in 1972 as a 2-speed the Standard Design LENCO is our largest and strongest transmission. Stay up to date with news and promotions by signing up for our monthlly newsletter. The middle case would also contain a 1.37 planet gear set. To add more speeds to a planetary transmission you add more sections. Each lever controls one planetary gear set. Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. Each case in succession. This unique clutch is a very popular replacement for clunky V-drive dog style in-out boxes. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. You could not make small adjustments, so owners had to be selective in their transmission and rearend gear choices. from DarkSide Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. Three planetary gears rotate around the sun gear like planets traveling in their orbit. Exclusively V.A.R. When you select a gear, the gear shaft moves a synchronizing gear that looks like a toothed collar. But extreme cost-among other things--has always been a huge inhibitor for all but the stoutest of street-driven machinery. I use an electric over air setup to shift my new B and J transmission. Lenco, the all time champion and undisputed leader in the drag racing transmissions. Then, continue to screw air servo Out (counter-clockwise) one half turn. - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. All Rights Reserved. Air servos or max-adjust shift towers. 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. 1.22% (1.219) - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear. How is this done? 1.500% Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear. Pistol Grip Manual Shifter. All Lencodrives come with the following (less converter). racing transmission, Stay up to date with news and promotions by signing up for our monthlly newsletter. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. Engineered for 1200 HP. The rear case a 1.31 ratio gearset. 4,600. To address this, Lenco added more gear ratios, particularly ratios which were half-steps to fill in the gaps so that a customer could fine tune their system without the pesky large leap that used to happen. Purpose designed and produced for drag, ski and river boat requirements. Screw air servo into case until it bottoms out against the jam nut. Magnesium cases are used for both the CS2, CS3 and CS4. 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. 1.297% Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear. When you add the fact that this car is a manual, it really makes this drag racing video a rare one to enjoy. 3 Speed + reverser with Pro output: 25.000". Air or lever shift. 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. 1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. 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. All ST1200 Street units now come with low drag bearings and a billet case. Small Sprag Assembly -This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. Air servos are machined from billet alum. 1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. Then start the tires spinning, now shift the front section so that you are now in high gear. The final section is the reverser. Going to high on the pressure shocks the transmission and drive-train. 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) The shifting process removes multiplication factors and subsequently results in all gear-sets, after This is not possible with a traditional cluster gear transmission. The Lenco Racing Lencodrive 2 Speed Automatic Transmission represents our response to people who hav.. You must multiply each case's underdrive ratio in order to determine the first gear ratio. 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. 4-Speed $9,830. This L.. Lenco Clutch Disk Alignment Tools areavailable in black anodized billetaluminum. 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 only difference is that in an automatic, the transmission fluid moves internal valves to close the clutch pack. Copyright 2020, Lenco Racing. 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. 1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear. 1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear. Screw the servo into the transmission case until contact is made with the shift fork pin. 1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear. Th.. You may choose any conventional input shaft spline. In general, all LENCO transmissions are a planetary design. 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. specific design will suit you best. The three speed is approximately 135 lbs. Assemble next section on to case and bolt tight. All shifting is done with the engine's clutch engaged. 1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear. The Lenco Racing Lencodrive 3Speed Automatic Transmission represents our response to people who have asked for a safe and affordable torque converter driven transmission. Multiply all three gearset ratios to determine the first gear ratio of 2.47:1. As with all LENCO transmissions a separate reverse unit is employed. It uses a clutch and flywheel assembly only to engage the transmission into first and reverse gears. Each gear is engaged by pulling down on the shift lever, to activate the clutch mechanism for each gear set. 1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. 1.23%Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Air or manual shift. With that said, the bare finish is a popular choice for the boat racing crowd, so for some beauty trumps added maintenance. Please call for ordering or technical information. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. 1.313% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. We do offer different thickness floaters for correcting the clutch pack clearance. 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. Copyright 2020, Lenco Racing. His typical drives usually include lighting up the rear tires while going sideways as he yanks the levers back, shifting the ensemble of levers to move the transmission through 1st, 2nd, and 3rd in quick succession. Stay up to date with news and promotions by signing up for our monthlly newsletter. 1.566%Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. 1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Gears that mesh easier suffer from less resistance, which leads to higher efficiency and less parasitic loss. Screw air servo into case until it bottoms out against the jam nut. The rear axle is a Dana 44 with independent half-shafts. View the whole process and start at the beginning. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. The ST1200 is the same engineering design as the all-out-race New Generation CS2 but with a couple of minor differences. and control slippage. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. Magnesium case is standard. To select any gear (ie 1st gear) the other two levers (3/4th & reverse) must be in the neutral (center) position. 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.

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how to shift a lenco transmission