Function of power flow in reverse gear Function of program selection "S" - GF27.10-P-3017GZ

TRANSMISSION 722.9 in MODEL 164.120 /122 /128 /175 /186 with CODE (430) Offroad package except CODE (494) USA version up to Model Year 8 

TRANSMISSION 722.9 in MODEL 164.177, 204.0, 216, 221, 251.0 /1 up to Model Year 8 

TRANSMISSION 722.9 in MODEL 164.822 /828 /871 /886 except CODE (494) USA version up to Model Year 8 

The Ravigneaux gear set consists of the following components:

• Short planet gears
• Long planet gears
• Small internal-geared wheel
• Dual planet carrier
• Sun gear (7)
• Large internal-geared wheel

The front single planetary gear set consists of the following components:

• Planetary gears (52)
• Internal-geared wheel (12)
• Planet carrier (13)
• Sun gear (14)

The rear single planetary gear set consists of the following components:

• Planetary gears (51)
• Internal-geared wheel (9)
• Planet carrier (10)
• Sun gear (11)

Power flow in reverse gear, program selection "S", function 

The following multi-disk brakes and multi-disk clutches are engaged:

• Multi-disk brake BR
• Multidisk brake B1
• Multidisk clutch K3

Ravigneaux gear set 

The small ring gear is driven via the transmission input shaft. The long planetary gears roll over the stalled sun gear (7) and transmit the increased torque and reduced rotational speed to the dual planet carrier.

Single rear planetary gear system 

The ring gear (9) rotates at the same speed due to the mechanical connection to the dual planet carrier. The planetary gears (51) roll on the sun gear (11). Due to the stalled planet carrier (10), the rotational direction of the sun gear (11) reverses.

Single front planetary gear system 

There is a connection between sun gear (14) and sun gear (11) via the engaged multidisk clutch K3. As a result sun gear (14) rotates at the same speed and direction of rotation as sun gear (11) and drives the planetary gears (52). The increased torque and reduced rotational speed as a result are transmitted via the planet carrier (13) to the transmission output shaft. The transmission output shaft thus rotates at reduced transmission input speed opposite to the direction of the engine.

	Torque converter component description		GF27.20-P-2010GZ
	Planetary gear set component description	Simple planetary gear system	GF27.50-P-2100GZ
		Ravigneaux gear set	GF27.50-P-2100GZZ
	Multidisk brake component description		GF27.51-P-5105GZ
	Multi-disk clutch component description		GF27.51-P-2010GZ