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Home >> Land Rover >> 2015 >> LR4 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Four-Wheel Drive Systems -- LR4/L319 >> Four-Wheel Drive Systems >> Four-Wheel Drive Systems (Description And Operation) >> Description And Operation >> Transfer Box Power Flow >> Low Range Operation
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Low Range Operation

In low range, the torque input from the transmission is passed to the transfer box input shaft. The synchronizer sleeve is moved and connects the planetary carrier to the differential housing. The torque from the transmission is now directed through the sun gear of the epicyclic gearset and, via the pinion gears and pinion gear shafts, into the planetary carrier. The annulus gear of the epicyclic gearset is secured inside the casing and generates the low range ratio of 2.93:1. The torque is then passed, via the synchronizer sleeve, to the differential housing where it is split between the two side gears. One side gear is connected by splines and passes the torque to the rear output flange. The second side gear is connected to the chain drive sprocket and passes the torque, via the chain, to the front output flange.