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The mode of operation of the gearbox lubrication system is such that the crown wheel, together with the gear wheels on 1st and 2nd gears, splash oil into a number of strategically placed oil pockets in the gear case. (When the car, and thus the crown wheel, is at a standstill, the gear wheel of 1st gear takes over the task.) From the oil pockets there are channels to the center channels of the input and output shafts. From here the bearings of 1st, 2nd, 3rd, 4th and 5th gears receive oil through the holes that are drilled in each center channel. The gear wheels of 1st and 2nd gears have sliding bearings on the output shaft. 3rd, 4th and 5th pinions have needle bearings on the output shaft.

In order to increase efficiency there is a low level of oil in the gearbox to avoid unnecessary splashing of oil.