Lenco Transmissions
Lenco Transmissions are the leader in Planetary Style transmissions around the world.  They provide gearing options to teams in Alcohol Funny Car to Top Fuel to Pro Stock to Pro Mod as well as Truck and Tractor Pull, Boats and much much more!

Aronson Motorsports utilizes a CS3 Lenco in their own Pro Stock Mustang!
Lenco ST-1200 Street/Strip Transmission
The LENCO ST1200 transmission has been specifically designed and engineered for severe duty street/strip applications. 
The ST1200 gives you the advantage of LENCO brute strength
at a lesser price than our full race units. 
The ST1200 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.   
As with all LENCO transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds.  Shift with either our patented
multi lever system or with the optional, more compact CO2 setup.
Multiple speeds are achieved through utilization of multiple cases. 
CLICK HERE for an overview explanation of how a LENCO transmission works. 
The ST1200 is available with all popular
bellhousing patterns - Ford, GM, MoPar and our own five-bolt design.  You may choose any conventional input shaft spline.  
We are able to offer the ST1200 StreetStrip at lower cost than our pure race CS1, CS2 and CS3 designs since we use 8620 steel instead of 9310 material for the ST1200 gears.  8620 is a premium quality material that will provide excellent service for 1200 HP hot rods.  9310 steel would be used in Pro Stock, Pro Mod and other similar applications where substantially more HP, torque and tire plant  is generated.  We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions.  The ST1200 comes with aluminum cases instead of the magnesium style race units.
Lenco CS1 Transmission
The CS1 design is  Lenco's largest and strongest transmission.  We recommended the CS1 for use in ultra-demand applications such as Supercharged Alcohol Funny Cars and High-HP/High-Torque Pro Mod cars.  The CS1 is available with up to five speeds and offers your choice of 19 first gear ratios.  The CS1 planetary gear size is 1". Magnesium case is standard.  Air or manual shift. 
The CS1 will control up to 3000 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.  CLICK HERE for diagram and description.

We also offer a 2" low gear Mega-HP, Monster Torque
2 speed for the most demanding of applications. 
See description at right
The CS2 design is engineered for race cars producing up to
2500 HP.  The CS2 is a smaller and lighter version of the CS1.  We recommended the CS2 for use when space is at a minimum.  The CS2 is available with up to five speeds and 12 first gear ratios.  The CS2 planetary gear size is 3/4". The CS2 is ideal for heavier Pro Mod cars, pullers and mud bog machines.   
All shafts are available in Marage or 300M material.

CS2 2-speed
1 magnesium case.
Handles up to 2500 HP.
Suggested for supercharged cars, boats, pullers, mud boggers and nitrous oxide assisted machines where available space is at a minimum and a tight fit a necessity. 
Air or lever shift .

CS2 3-speed
2 magnesium cases.
Handles up to 2500 HP.
Widely used in Top Dragster, supercharged alcohol, supercharged gasoline cars and boats. Small size helps solve fit constraints while still giving reliable LENCO strength and repeatability.  Air or lever shift.

CS2 4-speed
3 magnesium cases.
Handles up to 2500 HP.
Recommended for heavier nitrous oxide or supercharged machines when space is at a premium.  Popular with Pro Mod racers. 
Air or lever shift.

CS2 5-speed
4 magnesium cases
Handles up to 2500 HP.
Recommended for Pro Stock, Comp eliminator,
10.5 tire cars and similar classes.  With five forward speeds you can tailor the five ratios to fit your unique power band needs. Especially well suited for narrow rpm range and close tolerance engine/clutch tuning.
Air or lever shift.

We offer a variety of lightening procedures for internal rotating mass and suggest you call and discuss your exact application and requirements.  All of our transmissions are purpose built and there is no �Off the shelf, one size fits all� LENCO.   As with all LENCO transmissions the CS2  may be shifted with CO2 or manually.  Cast magnesium case is standard.
Lenco CS3 Transmission
The LENCO CS3 is the smallest and lightest version of our 
New Generation designs.  The very compact CS3 is engineered for cars producing up to 1800HP and weighing up to 2700 pounds. Standard planetary gear size is 1/2".  The CS3 is ideal for ADRL Pro Stock as well as NHRA Competition Eliminator machines.

The New Generation CS3 LENCO is available with up to
5 forward speeds plus reverse.  All shafts are available in Marage or 300M material.  We offer a variety of procedures for lightening rotating mass - such as optional titanium planet cases - and suggest you call to discuss your specific application and objectives.   A Low-Drag reverse is also an option to our standard reverse unit.  

As with all LENCO transmissions the CS3 may be shifted with CO2 or manually by our patented lever system. 
A lightweight magnesium case is standard.
CS1 Gearing Ratios

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.
CS3 Gearing Ratios

1.16%
Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear.

1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.

1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.

1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear.

1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear.

1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear.

1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear.


1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear.

1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear.

1.297% Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear.

1.313% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear.

1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear.

1.356% Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear.

1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear.

1.378% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear.

1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear.

1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear.

1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear.

1.500% Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear.

1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear.
CS2 Gearing Ratios

1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear.

1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.

1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.

1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear.

1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear.

1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear.

1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear.


1.20% Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear.

1.22% Uses 38 tooth planet gears, a 22 tooth sun gear and a 98 tooth ring gear.

1.25% (Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear.

1.25% (Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 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.

1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 tooth ring gear.

1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear.

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.

1.46% Uses 22 tooth planet gears, a 37 tooth sun gear and an 80 tooth ring gear.

1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear.

1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear.

1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear.

1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and 91 tooth ring gear.

1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and 104 tooth ring gear.
ST 1200 Gearing Ratios

1.25%
ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear.

1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear.

1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear.

1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear.

1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear.