Hummer H2. Manual - part 886
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Differential Axle Housing
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Differential Carrier
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Electronic Locking Mechanism
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Right and left Axle tubes
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Right and left axle shafts
The H2 uses the 9.50 inch ring gear axle. This type of the axle can be identified by the stamping on the right
side axle tube. It may also be identified by the ring gear size. The locking differential information for this rear
axle can be located in the locking differential section.
This differential has a set of 4 gears. 2 are side gears and 2 are pinion gears. Each side gear is splined to an axle
shaft so each axle shaft turns when its side gear rotates. The pinion gears are mounted on a differential pinion
shaft, and the gears are free to rotate on this shaft. The pinion shaft is fitted into a bore in the differential case
and is at right angles to the axle shafts. Power is transmitted through the differential as follows: The drive
pinion rotates the ring gear which is bolted to the differential case assembly. The differential pinion, as it rotates
with the case, forces the pinion gears against the side gears. When both wheels have equal traction, the pinion
gears do not rotate on the pinion shaft because the input force on the pinion gear is equally divided between the
2 side gears. Therefore the pinion gears revolve with the pinion shaft; but do not rotate around the shaft itself.
The side gears; being splined to the axle shafts, and in mesh with the pinion gears rotate the axle shafts. When
the vehicle turns a corner the inner wheel turns slower than the outer wheel which slows the rear axles' side
gear. The rear axle pinion gears will roll around the slower moving rear axle side gear; driving the rear axle side
gear wheel faster.
SPECIAL TOOLS AND EQUIPMENT
SPECIAL TOOLS
Special Tools
Illustration
Tool Number/Description
J 2619-01
Slide Hammer
J 7818
Inner Bearing Race Installer
2004 Hummer H2
2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2