Aligning vehicle at front and rear
Vehicle height/wheel loads
The vehicle height on the front and rear axle of the 911 GT3 can be adjusted at the spring struts.

Adjusting the height means that different wheel loads on the left and right can be corrected.

At the correct height the wheel-load differences lie within a permissible range, provided that the coil springs have the same installation position (installed spring preload) on each axle. Tolerance 1 mm. Wheel-load differences can be kept as low as possible in conjunction with wheel-load weighing machines. Tolerance from right to left on front and rear axle is less than 15 kg.

To check the height of a ready-to-drive vehicle (full tank and tools, washer-fluid reservoir full), place the vehicle on a level surface or on the measuring station.

Required values for front and rear axle can be found in the table → 4400TW Adjustment values for suspension alignment.

Adjustments should be made with the axle raised. Taking the load off of the wheels makes it easier to make the adjustment (adjusting nuts on the spring strut are easier to turn and will not be visually damaged).

Basic information on height changes/wheel-load changes

When changing the height/wheel-load, the following must be noted:

. A one-sided height change causes a wheel-load change at the same time. A wheel-load change on one wheel also alters the wheel loads of the other wheels.

. A one-sided increase in the installed spring preload (raising vehicle) increases the wheel load.

. A one-sided decrease in the installed spring preload (lowering vehicle) decreases the wheel load.

. A change in the wheel-load is always transferred diagonally onto the other axle side. This means that if the wheel load on one wheel is decreased or increased, the same occurs on the diagonally opposite wheel.

. Max. wheel-load difference from left to right on front and rear axle is less than 15 kg.

. Example: Rear left spring preload is increased. As a result, the wheel load: rear left -C- and front right -B- is increased ---------- rear right -D- and front left -A- is reduced.

Front axle

From road contact surface to hexagon-head bolt of cross-member screw connection to the body.

Rear axle

Measure from wheel contact surface to the locating bore in the rear-axle side section (between toe and camber eccentrics).