the unic awd transmission -...
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UNIC AB Box 258, Industrigatan 17661 33 SäffleSweden
Tel +46 (0)533-170 70Mob +46 (0)705-366533 Fax +46 (0)533-165 81
Gearbox5-speed & Reverse with sequential gearshift.Two options of gear ratios and drop gear with several options.
Center diffUnic ramp diff with several ramp options and up to 20 friction faces. Fixed preaload from springs and option with quick adjustable preaload.
The UNIC AWD transmissionFor Rallycross - Supercar and other high power 4WD competitionFor Drifting and other high power RWD competition (without c-diff and front final drive)
Front & Rear final gear unitAluminium casing. Pinion & Crownwheel for high loads. Unic ramp diff with several ramp options (same ramp parts & friction discs in center, front & rear).
Quick adjustable preaload from outside. Front diff with special joint design to get more plunge and longer driveshaft.
UNIC AB Box 258, Industrigatan 17661 33 SäffleSweden
Tel +46 (0)533-170 70Mob +46 (0)705-366533 Fax +46 (0)533-165 81
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Access & ServiceQuick service and repair between heats is one of the most important properties of a winning Super-Car concept. The Longitudinal layout is outstanding concerning this. The separate front, center and rear differential unit are easy and quick to access, adjust or replace. The UNIC gearbox is designed to be very easy to dismount with few screws, an input spline shaft only 25 mm long. The prop shafts with spline to the gearbox means just 2 bolts have to be removed.
There are 3 pcs inspection plugs in the gearbox casing which can be removed for dog inspections.When the gearbox is dismounted, the bellhousing can easily be removed to access the clutch and flywheel.
The longitudinal engine position makes it also ea-sier to work on the engine because of nice access to both sides. The better space on the engine sides can also be used for a twin A-arm solution.
The CW-joint’s for the rear driveshafts are moun-ted with just 3 screws. In front it is a tripod solution and on the left side the complete twin driveshaft is removed with just 2 screws. On the right front the complete driveshaft is removed by snapping out the complete joint from the front diff.
WeightsTorque tube complete incl. bellhousing, shafts, mounting plate: 13 kg
Gearbox incl. drop gear: 31 kg
C-diff incl. casing and shafts: 11 kg
Prop shafts (tube of high strength steel): 5 kg each
Final gear unit Front incl. right hand”Tulip” for tripod: 23 kg
Transaxle left front incl. ”Tulip” & supportbearing: 4 kg
Final gear unit Rear incl. 2 Flange shafts forCW-joints: 24 kg
Alternator 200A incl. mounting kit (brackets,tensioner, PTO-shaft, pulleys, belt): 6 kg
Weight distributionWeight distribution between the rear and front axle for the UNIC longitudinal transmission is better than other longitudinal solutions, and far better than a transverse layout because the engine and especially the gearbox are located more to the rear. With the UNIC alternator kit the alternator is mounted at the rear end of the gearbox. This mean about 6 kg are moved from a position in front of the car to a low position close to the car center.
The Starter motor is mounted in the bellhousing. This mean about 3-4 kg weight is located more to the rear and lower than the standard position.
The front diff unit and driveshaft joints (WRC tripod) are designed to give extra long plunge as well as long driveshafts in order to allow a low transaxle position (= low engine position).
PerformanceThe UNIC gear shift system is optimised in order to give ultra quick and safe gearshifts. This gives the bonus effect that the dog wear is close to nothing.
The UNIC LHS Limited Slip Differentials are used in Front, Rear and Center. This diff has a smooth function and the preload can be adjusted from outside.The design of diffs, driveshafts and joints allows a very long suspension travel.
ReliabilityThe 100 mm distance between the main axles in the gearbox make the UNIC gear box very strong. The rest of the drive train is designed to keep up with this strength without any weak point.
The relability are proved from a very few problem occasions in all SuperCar races in the World Championship 2014 and the European Championship 2013 & 2014.