Sectioned view of gearbox (Automatic gearbox - ZF4HP22/24)

The gearbox consists of a torque converter housing, an intermediate plate, a gearbox housing and a rear extension housing, bolted together in series. The rear of the gearbox is supported by a rubber mounting installed between a mounting bracket on the gearbox and the LH chassis rail. A heat shield is installed on the mounting to protect it from the exhaust.

Sectioned view of gearbox

1 Lock-up clutch 2 Impeller 3 Turbine 4 Forward drive clutch 5 Reverse drive clutch 6 Brake clutch 7 Brake clutch 8 Brake clutch 9 Epicyclic gear set

10 Epicyclic gear set 11 Clutch 12 Brake clutch 13 Output shaft 14 Freewheel (one way clutch) 15 Freewheel (one way clutch) 16 Freewheel (one way clutch) 17 Stator and one way clutch

Torque converter housing The torque converter housing attaches the gearbox to the engine and contains the torque converter. Different torque converter housings are used to accommodate the difference between the V8 and Td5 engine interfaces. The torque converter is connected to the engine drive plate and transmits the drive from the engine to the gearbox input shaft. When engaged, a hydraulic lock-up clutch in the torque converter prevents slippage, to give a direct drive from the engine to the gearbox for improved driving response.