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Home >> Jaguar >> 2019 >> XF S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission/Transaxle - RWD -- XF/(X260)) >> Automatic Transmission/Transaxle - RWD (G1868372) >> Description And Operation >> Transmission Description (G2057307) >> Description >> Planetary Gear Trains

Planetary Gear Trains

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The eight forward gears and the reverse gear are produced by a combination of four simple planetary gear sets, three clutches and two brakes. The front two gear sets share a common sun gear. Power is output always through the planetary carrier of the fourth gearset.

Five shift elements comprising three clutches and two brakes, are responsible for all eight forward and reverse gears. High efficiency is achieved by the use of only two shift elements disengaged in each gear which reduces drag and so increases the efficiency.

Planetary Gear Set 1 

The planetary gear sets 1 comprises:

Planetary Gear Sets 2 and 3 

The planetary gear sets 2 and 3 comprise:

G11292182Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC
ITEM DESCRIPTION
1 Planetary gears - gear set 1
2 Ring gear - gear set 1
3 Planetary gear carrier (spider)
4 Planetary gears - gear set 2
5 Ring gear - gear set 2
6 Planetary gears - gear set 3
7 Ring gear - gear set 3
8 Sun wheel - gear set 3
9 Sun wheel - joint gear sets 1 and 2

Planetary Gear Set 4 

The planetary gear set 4 comprises:

G11291807Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC
ITEM DESCRIPTION
1 Ring gear
2 Planetary gears
3 Output shaft/gear carrier
4 Sun wheel