Power flow in reverse gear, program selection "C", function - GF27.10-P-3025SX

TRANSMISSION 722.9 in MODEL 164.177, 204.0, 216, 221, 251.0 /1 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 "C", function 

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

• Multi-disk brake BR
• Multiple-disk brake B3
• Multi-disk clutch K3

Ravigneaux gear set 

The small ring gear is driven via the transmission input shaft. The long planetary gears drive the short planetary gears which roll in the large stalled ring gear. The resulting increased torque and resulting decreased rotational speed are transmitted to the dual planet carrier.

Single rear planetary gear system 

The ring gear (9) rotates at the same rotational speed due to the mechanical connection to the dual planet carrier. The planet gears (51) roll on the sun gear (11). The stalled planet carrier (10) results in the sun gear (11) reversing its direction of rotation (10).

Single front planetary gear system 

Sun gear (14) is connected to sun gear (11) via the engaged multi-disk clutch K3 As a result the sun gear (14) rotates at the same rotational 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 rotation 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
	Multi-disk brake component description		GF27.51-P-5105GZ
	Multi-disk clutch component description		GF27.51-P-2010GZ