Chevrolet Sonic Repair Manual: Scrub Radius Description
Ideally, the scrub radius is as small as possible. Normally, the SAI angle and the centerline of the tire and the wheel intersect below the road surface, causing a positive scrub radius. With struts, the SAI angle is much larger than the long arm/short arm type of suspension. This allows the SAI angle to intersect the camber angle above the road surface, forming a negative scrub radius. The smaller the scrub radius, the better the directional stability. Installing aftermarket wheels that have additional offset will dramatically increase the scrub radius. The newly installed wheels may cause the centerline of the tires to move further away from the spindle. This will increase the scrub radius.
A large amount of scrub radius can cause severe shimmy after hitting a bump. Four-wheel drive vehicles with large tires use a steering damper to compensate for an increased scrub radius. Scrub radius is not directly measurable by the conventional methods. Scrub radius is projected geometrically by engineers during the design phase of the suspension.
Replacement Wheels Description
Replace the wheel if any of the following conditions exist:
The wheel exhibits excessive runout.
The wheel is bent.
The wheel is cracked.
The wheel is severely rusted.
The wheel is severe ...
Spare Tire Kit Installation
Installation Instructions Part Number
95280943
Procedure
...
Other materials:
Instrument Panel Fuse Block Access Hole Cover Replacement (With AAL)
Instrument Panel Fuse Block Access Hole Cover Replacement
Callout
Component Name
1
Instrument Panel Fuse Block Access Hole Cover
Procedure
Grasp the lower edge of the fuse block cover and pull outward disengaging ...
Intake Camshaft Replacement
Removal Procedure
Remove the camshaft intake and exhaust sprocket. Refer to Camshaft Intake
and Exhaust Sprocket Replacement.
Remove the camshaft bearing cap bolts in sequence shown. Ensure to remove
the bolts one turn at a time until there is no spring tension p ...
Synchronizers Disassemble
1st/2nd Gear Synchronizer
iv
Note: When servicing the synchronizers, retain them in the
same order that they are removed. Keep the synchronizer components together
and mark them to identify correct location.
Remove the 1st/2nd gear synchronizer hub ...
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