LR3/Disco 3
The rear drive shaft assembly comprises front and rear shaft assemblies and a centrally mounted shaft bearing. The rear
drive shaft assembly has an overall nominal length of 1309 mm.
Front Shaft Assembly
The front shaft assembly incorporates a crash feature within the tube, which controls the collapse of the drive shaft during
a crash.
The front shaft assembly comprises a CV joint at each end (see 'Halfshaft Joint' section for more information on CV
joints).
The front CV joint (transfer box end) has six radial holes, which provide for the attachment to the transfer box rear output
flange. The joint is secured to the output flange with six torx bolts, which screw into threaded holes in the flange. Three
compression link washers are fitted under each pair of bolts. The rear splined shaft mates with splines in the rear shaft CV
joint hub and is pressed in and fixed with Locktite. A machined surface on the shaft accepts the shaft bearing, which is a
press fit.
Rear Shaft Assembly
The rear shaft assembly comprises a Hookes type universal joint at the rear (rear differential end).
The universal joint is welded to the rear shaft tube and is secured to the input shaft of the rear differential with four flanged
nuts. The opposite end of the rear shaft tube is welded directly to the CV joint body.
Shaft Bearing Assembly
The shaft bearing assembly comprises a pressed steel housing, a rubber diaphragm and a ball bearing. The diaphragm is
bonded into the housing. An internal metal ring, bonded to the bush, allows for the bearing to be press fitted into it. The
rubber bush allows for small deviations in alignment and also absorbs vibrational forces. The shaft bearing assembly is
located by screws, which pass through plain holes in the bearing assembly and locate into nuts welded on the inside face
of the chassis cross-member.
2
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Collapsible crash section
3
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Front shaft assembly
4
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Support bearing
5
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Rear shaft assembly
6
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Universal joint
