B2FG0AK1 - 406D9 4HP20 AUTOMATIC GEARBOX

REMOVAL - REFITTING DRIVE SHAFTS

1 - REMOVAL

WARNING : the 4HP20 automatic gearbox is sealed for life; there is no need to drain the gearbox for this operation .

Use a wheel free lift, To make the operation easier .

Remove the wheels .

FIT THE TOOL [26] .

IMPERATIVE : never apply the brakes to release the nut (3) as this risks shearing the disc bolts .

Remove :

• the pin (1)
• the lock nut (2)
• the nut (3)

Right hand drive shaft :

• slacken the bolts (4)
• turn the bolts by half a turn

Remove the nut (5) .

EXTRACT THE PIVOT BALL JOINT USING TOOL [27] .

Detach the swivel ball joint (USING THE TOOL [28]) .

Right hand drive shaft :

• turn the steering to full right lock

Left hand drive shaft :

• turn the steering to full left lock

Detach the drive shaft from the hub .

Remove the drive shaft .

2 - REFITTING

Check :

• there is no clearance in the joints (6)
• the condition of the gaiters (7)
• the bearing roller (8)

Rectify If necessary .

Clean and coat with multi-purpose grease the splines of the hub and of the driveshaft on the wheel side as well as the splines of the sun gears of the differential and of the final drive end driveshafts .

Right hand drive shaft :

• clean and coat with multi-purpose grease the outer bush of the bearing roller (8) and its housing in the right-hand lower engine mounting

When refitting the right hand drive shaft, check :

• the presence and condition of the O-ring (9)
• the pivot ball joint

When refitting the left drive shaft, check :

• the presence and condition of the O-ring (10)
• the pivot ball joint

3 - TIGHTENING TORQUE(S)

Drive shaft bearing nut : 1 da.Nm .

Drive shaft nut : 32,5 da.Nm .

Wheel bolts : 9 da.Nm .

The pivot ball joint nut to 4,5 da.Nm .