CS1 4 Speed
Lenco CS1 Transmissions
The Lenco CS1 4 Speed design is our largest and strongest transmission. We recommended the CS1 4 Speed transmission for use in ultra-demand applications such as Supercharged Alcohol Funny Cars and High-HP/High-Torque Pro Mod cars.
The CS1 transmission is available with up to five speeds and offers your choice of 19 first gear ratios. The CS1 planetary gear size is 1".
Billet Aluminum case, air or manual shift.
The Lenco CS1 transmission will control up to 4000+ HP. Shafts are available in Marage or 300M material.
As with all Lenco transmissions, the CS1 is based on individual 2 speed planetary units with additional speeds being achieved through utilization of multiple 2 speed units. See the How a Lenco Works tab above for additional information.
CS1 4 Speed
Three Billet Aluminum cases. Handles up to 4000+ HP. Ideal for heavier cars where the advantage of a wide gear ratio selection is desired. Commonly used in supercharged or nitrous oxide assisted Pro Mod and Super class types of cars. Air or lever shift.
Reverse Unit – available Option. However, if bought separately, price is $2,050.00
Billet Aluminum case. Mates to CS1, CS2, CS3 or CS4 transmission. 5 1/2 long, manual shift only.
Pricing: Option pricing is based on a transmisison purchase, plus the reduced price of the option. Options are available separately at normal price. Please see the Lenco Parts List under the Tech tab for current pricing of individual parts.
Also available in:
CS1 2 Speed
One billet aluminum case. Handles up to 4000+ HP. Designed for use in supercharged boats, pullers, mud boggers and other severe duty applications. Available with air shift servo, or lever shift system.
CS1 3 Speed
Two billet aluminum cases. Handles 4000+ HP. Recommended for supercharged alcohol and nitromethane fueled cars and boats, Top Sportsman and Pro Mod applications as well as very high torque pullers. Air or lever shift.
CS1 5 Speed
Four billet aluminum cases. Handles up to 4000+ HP. Ideal for heavier cars where the advantage of a wide gear ratio selection is desired. Commonly used in supercharged or nitrous oxide assisted Pro Mod and Super class types of cars. Air or lever shift.
1" Gear Set.
Light weight components throughout (except ring gears).
Low drag angular contact and needle bearings.
Choice of ratio.
Air servo or max-adjust shift towers.
Choice for output length and spline (16 or 32).
Neutral if requested.
Throwout bearing collar (4 and 5 speed only).
CS1 Gears 1"
1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear.
1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear.
1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear.
1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear.
1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear.
1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear.
1.44% - Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear.
1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear.
1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear.
1.48% - Uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear.
1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear.
1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear.
1.68% - Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear.
In general, all LENCO transmissions are a planetary design. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio.
In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear.
Each sun and planet gearset provides two speeds. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio.
Each LENCO transmission is thus a two speed and is housed in one dedicated two speed.
We acheive more than two speeds by combining multiple cases.
|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.
Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios.
You must multiply each cases underdrive ratio in order to determine the first gear ratio.
By multiplying these three ratios you come up with a 2.46 first gear ratio. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Final drive ratio is 1:1.
Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. The gearset in the third case alone, 1.31:1, determines the third gear ratio. All three units shifted equal final drive ratio of 1:1.
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. The planet gears are driven by an encompassing ring gear.
When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Thus a 1:1 ratio is achieved.
Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio.
Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio.
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.