Clutch Pack Information
Lenco Transmissions utilize several different styles of clutch discs depending of which style LENCO you have. You will also find different clutch disc numerical counts in each case. Our most common style clutch disc is
GREEN and comes in two sizes depending on which style transmission you have. There is also a BLUE disc and a TAN disc. Both of these styles come in one size only.

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.
Your clutch packs need to have the proper air gap or clutch pack clearance in order to operate correctly.
First you need to determine which style clutch packs you are working on - see chart. You always sequence assembly with one floater and then a clutch disc. Repeat the procedure and end up with one floater. It is sometimes necessary to have an extra floater disc to reach the desired clutch pack clearance. 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 take all the lash out by lifting up on the clutch housing (outer housing) and press down on the pressure plate. Next 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 and should be between .080"-.120". Clearance can be adjusted by adding or subtracting floaters . We 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. The clutch pack is now complete and ready for installation

AIR SHIFT INFORMATION
(Only on 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 need to reinstall them with their lock nut spun completely to the top of its travel (next to top housing). 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.

Adjustment
Once the servo is installed make sure it is loose and can turn freely. Remove fill plug on top the transmission case you are going to adjust. Sight through plug hole and 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. 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 you are race ready.

SHIFT PATTERNS
All shift levers when in the forward position result in the transmission being in first gear. The tallest lever 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
Roll up to the water box and stop. Shift all sections except the front section - you are now in first gear. Next start the tires spinning, now shift the front section so that you are in high gear. Proceed with burnout.  You always need to come out of the water box in high gear to prolong the life of the transmission.

CHECKING SHIFT PRESSURE
To measure the shift pressure install checking lever into the tower and screw jam nut all the way up so it is out of the way. Now rotate tower clockwise until it lightly touches pin on shift fork. Next rotate the tower counter clockwise 2 turns and place hook of testing scale in top hole of checking lever supplied with transmission (this lever should be about 5 1/2" over all length). Pull scale slowly in order to shift the transmission. The highest scale reading is your shift pressure. If the shift pressure is set to your desired number lock the jam nut. If the pressure is not what you wish you then need to add shim to raise pressure or subtract shim to reduce pressure. If necessary you may vary 1 full turn up or down from your 2 turns out in order to achieve the shift pressure desired.