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Lenco Parts
CS1 Tech
Gear Ratios CS1

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.

Schematics CS1

Schematics Reverse CS1

Installation Notes CS1

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

CS1N Tech
Gear Ratios CS1N

CS1N Gears 2"

1.17% (1.165) - Uses 22/38 tooth planet gears, a 24 tooth sun gear and an 84 tooth ring gear. 
1.19% (1.191) - Uses 28/38 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear.
1.22% (1.219) - Uses 30/35 tooth planet gears, a 23 tooth sun gear and a 90 tooth ring gear.
1.25% (1.252) - Uses 24/28 tooth planet gears, a 23 tooth sun gear and a 78 tooth ring gear.

Schematics CS1N

Not available at this time.

Schematics Reverse CS1N

Not available at this time.

Installation Notes CS1N

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

CS2 Tech
Gear Ratios CS2

CS2 Gears 3/4"

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.

Schematics CS2

Schematics Reverse CS2

Installation Notes CS2

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

CS3 Tech
Gear Ratios CS3

CS3 Gears 1/2"

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.

Schematic CS3

Not available at this time.

Schematics Reverse CS3

Installation Notes CS3

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

CS3 Timing Charts
CS4 Tech
Gear Ratios CS4

CS4 Gears 5/8"

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.

Schematics CS4
Not Translated
Schematics Reverse CS4

Installation Notes CS4

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

Lencodrive Tech
Gear Ratios Lencodrive

Lencodrive Ratio - Gears 3/4"

1.20% Uses compound 22 and 32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.
1.22% Uses compound 21 and 30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear. 
1.25% Uses compound 25 and 29 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear.
1.28% Uses 32 tooth planet gear, a 25 tooth sun gear and an 89 tooth ring gear.
1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear.
1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and a 80 tooth ring gear.
1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and an 74 tooth ring gear.
1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and a 79 tooth ring gear.
1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 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 a 91 tooth ring gear. 
1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and a 104 tooth ring gear.

Schematics Lencodrive

Not available at this time.

Installation Notes Lencodrive

Not available at this time

ST1200 Tech
Gear Ratios ST1200

ST1200 Gears 3/4"

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.

Schematics ST1200

Schematics Reverse ST1200

Installation Notes ST1200

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

Boat Tech
Gear Ratios Boat

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.
 

CS2 Gears 3/4"

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.
 

CS3 Gears 1/2"

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.

Schematics Boat Transmission

Not available at this time.

Schematics Reverse Boat

Not available at this time.

Installation Notes Boat Trans

All LENCO transmissions operate in basically the same way and if you have any questions about servicing your trans please call our tech line at (909) 673-9080.

 

INSTALLATION
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. See(input diagram). There must be a minimum of .060" to a maximum of .090" of clearance between face of pilot bearing to beginning of clutch spline.

 

LENCO transmissions are shipped with the shift levers removed in order to prevent damage during shipping. To install lever remove bolt, insert lever in shift tower so that it faces forward and install bolt. When the installed lever is loose that section is in low and when the lever is tight the sections in high.

Shifter Tech
Operation

Shift Patterns:
All levers in forward position result in the transmission being in first gear. The tallest to the right is used to shift the transmission from first to second gear. The second lever, and second tallest, is used for third gear. The next lever is used for fourth gear and final lever for fifth.

Burnout's (on all LENCOS):
When doing burnout's you need to roll up to the water box then shift all sections accept the front section. Then start the tires spinning, now shift the front section so that you are now in high gear. You always need to come out of the water box in high gear to prolong the life of the transmission.

Shift Pressure

Checking Shift Pressure (only on CS-1 style or center shift transmissions):

To measure the shift pressure install checking lever into tower screw jam nut all the way up the tower so it's out of the way. Now rotate tower clockwise until it lightly touches pin on shift fork then rotate tower counter clockwise 2 turns and place hook of scale in top hole of checking lever supplied with transmission (this lever should be about 5 1/2" over all length) and pull scale slowly to shift section, taking note of highest reading this is your shift pressure. 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.

 

If needed you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired.

Servo

CS-1 style or center shift transmissions:
Air shifted LENCOS come pre adjusted from the factory. If it is necessary to remove the servos you should reinstall with the lock nut spun completely to the top of its travel. Screw the servo into the transmission case until contact is made with the shift fork pin. Now rotate counter clockwise 1/2 to 1 turn and tighten lock nut. No further adjustments are necessary as there is ample reserve travel in the servo.

CS2, CS3, CS4 & Lencodrive or offset shift transmissions:
There are two different size air servos for the New Generation transmissions.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. 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 arm is held into the servo piston by a set screw. Run the air servo jam nut and o-ring up the threads on the servo. Screw air servo into case until it bottoms out against the jam nut. Rotate air servo into case until you see the set screw in the air servo piston boss inside the case. Apply a small amount of Red (271) Locktite on the set screw. 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. Warning: Do Not over tighten set screw. The arm must be free to move in all directions. Screw air servo counter-clockwise about five or six turns before you reassemble the transmission. Assemble next section on to case and bolt tight.

Adjustment:
Once installed, make sure the air servo is loose and can turn freely. Remove fill plug on top the transmission case you are going to adjust. Sight through plug hole, where you will see the outer edge of the rotary shift plate. 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. Then, continue to screw air servo Out (counter-clockwise) one half turn. This will allow for free play in the shift system. Run air servo jam nut and o-ring down against the case and tighten with a 1 1/2" wrench. Do Not Over Tighten. Add fluids as necessary and install fill plug. Attach air lines and your race ready.

Clutch Tech
Clutch Pack Info

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. Our most common style clutch disc is the green disc and it comes in two sizes depending on which style transmission you are working on. There is also a blue disc and a tan disc both of these styles come in one size.

Our blue, green and tan disc are supplied new at approximately .058"- .061" thickness. When discs wear to .052" or less they must be replaced. Glazed, burned and chipped discs must also be replaced immediately.

When setting up your clutch packs they need to have the proper air gap or clutch pack clearance. First you need to determine which style clutch packs you are working on see chart. First you always start with at least one floater and then a clutch disc and repeat ending up with at least one floater. 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. Leaving the pressure plate spring (wave spring) out, place the pressure plate on top of the clutch pack. 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. This clearance should be between .080"-.120" and can be adjusted by adding or subtracting floaters . We do offer different thickness floaters for correcting the clutch pack clearance. Once you have achieved the proper clearance reinstall the pressure plate spring and clutch housing snap ring it is then complete, ready for installation.

Sprag Tech
Sprag Info
Small Sprag Large Sprag Double Sprag
 

The Sprag clutch is utilized in each shiftable section of the LENCO with the exception of the reverse. Its used to force the gear set to make ratio by preventing the sun gear from rotating in one direction. When this same section is shifted the Sprag then allows the sun gear to rotate in the same direction as the crankshaft.
 

Different Sizes - LENCO utilizes several different styles and sizes of sprags depending on which application the transmission is used for.
 

Small Sprag Assembly - This is a our small Sprag, note the snap ring in the outer race and single brass thrust washer. Unfortunately, we no longer sale small Sprags do to the ever increasing horse power produced with today's motors. We found the small Sprags service life growing shorter and shorter, so we have discontinued it and highly recommend upgrading to our large Sprag assembly.
 

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. This is what comes standard in most new LENCO transmissions. It's capacity is much stronger than the small sprag.

 

Large Strips and Clips Sprag Assembly - This is a specialized sprag and is used in applications where tire shake is a constant problem. It has special attachments to help it react quicker between the locked and the overrun position thus extending its service life.
 

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. This is a very extreme duty sprag assembly.

For additional information about Lenco products please email us here, or call us at (909) 673-9080.