wheel torque BMW X5 1999 E53 Workshop Manual

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Drivetrain-Transfer Case
The transfer case is manufactured by New Process Gear Division of New Venture Gear
Company. It is identified as model NV 125.
It incorporates a planetary gear set and chain to provide the torque split and all wheel drive.
The output torque of the transmission is applied to the planetary carrier of the gear set. The
rear drive shaft is connected to the annulus gear and the front drive shaft is connected to
the sun gear through the chain drive.
As the output shaft of the transmission turns, the planetary carrier rotates, causing the
planetary gears to drive the sun gear and annulus gear.
A torque split of 68% rear/ 32% front is provided through the gearing of the planetary set.
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Wheels and Tires
Light alloy wheels are standard equipment on the X5.
The wheels sizes include:
3 Liter version
• Standard Wheel - 7.5J x17 SEH2
• Standard Tires - 235/65R - 17 H rated all season
Front and Rear
4.4 Liter version standard suspension
• Standard Wheel - 8.5J x 18 EH2
• Standard Tires - 255/55R - 18 H rated all season
Front and Rear
4.4 Liter version sports suspension
• Standard Wheels - 9J x 19 EH2 FRONT
10J x 19 EH2 REAR
• Standard Tires - 255/50R -19 Front/285/45R - 19
Rear V rated
The X5 uses a two piece lug bolt that incorporates a spacer wash-
er and features anti-corrosion coating. The tightening torque on the
lug bolts is 130Nm +/- 10Nm. Advantages of using the spacer
washer include:
• Longer expansion length for the bolt.
• A better fit to the wheel
• The spacer washer is fixed to the wheel when tightening and
the lug bolt turns relative to it.