Position R-Back-Up (Reverse) Gear

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Position R-Back-Up (Reverse) Gear

Courtesy of VOLVO CARS OF NORTH AMERICA.

Primary shaft (P1, P2):

The input shaft rotates clockwise and C2 connects the input shaft with the sun gear shaft so that it also rotates clockwise at the input shaft speed. The inner planetary gears rotate counter-clockwise. The outer planetary gears rotate clockwise and at the same time move around the inner planetary gear.

B3 locks the front planetary train ring gear so that it cannot rotate in any direction. The ring gear and the driven intermediate gear rotate counter-clockwise.

Secondary shaft (P3):

Because the driving intermediate gear rotates counter-clockwise, the driven intermediate gear and the ring gear are driven clockwise as a unit. B4 locks the sun gear so that it cannot rotate in any direction.

The planetary gears rotate clockwise and at the same time move clockwise around the sun gear. The planetary gear carrier and the driving final drive gear rotate clockwise. The driven final drive gear rotates counter-clockwise.