Chevrolet Sonic Repair Manual: Tire and Wheel Balancing (Road Force Variation (RFV))

Chevrolet Sonic Repair Manual / Chassis / Wheels/Tires / Wheels / Tire and Wheel Balancing (Road Force Variation (RFV))

ALL wheel/tire assemblies must have a RFV within spec before being mounted on vehicle.

Important:

If a wheel/tire assembly is not within the RFV specification after match mounting, the tire must be returned to the tire manufacturer. DO NOT install tire/wheel assembly on a vehicle if it exceeds the RFV specification.

RFV is unrelated to tire balance.
RFV is identifying the stiff portion of the tire and determining if it is within spec.
If RFV is too high, it will result in a vibration condition.
Do not attempt to measure RFV on tires that have temporary flat spots. If necessary, drive the vehicle to relieve the flat spots.
Prior to measuring for RFV, the tires must be inflated to the specification on the label.

Passenger Cars (including Crossover Vehicles) = 18 lbs.
Truck Tires: (P) - metric = 24 lbs.
(LT) - metric = 35 lbs.

It is recommended that RFV measurements are made prior to installation of balance weights. Once adequate road force levels have been achieved, move on to balance the assembly.

Tire and Wheel Balancing (Collet Cone Selection)

Important: Never use the hub cap bore to center the wheel onto the balancer. The pilot bore (on the hub side of the wheel) is machined to be concentric to very tight non - standard tole ...

Tire and Wheel Balancing (Wheel Pilot Bore Greasing)

Beginning with MY 2011 vehicle, pilot bore grease should be applied. To enable this, grease must be applied to the pilot bore to prevent the wheel from seizing onto the hub. Refer to Adhesi ...

Other materials:

Plastic Collar Quick Connect Fitting Service
Removal Procedure Warning: Refer to Gasoline/Gasoline Vapors Warning. Note: There are several types of plastic collar fuel and evaporative emission quick connect fittings used on this vehicle. Bartholomew (1) Q Release (2) Squeeze to Rele ...

Drive Range, First Gear Engine Braking (Gen 2)
Note: Some models of the 6T30/40/45/50 automatic transmission are equipped with an electric auxiliary fluid pump for use in hybrid vehicles (BAS+). Hybrid vehicles do not require internal combustion engine (ICE) operation at all times. After a successful engine start, the hybrid powertrain con ...

Radiator Replacement (LDE LUW)
Radiator Replacement Callout Component Name Preliminary Procedures Drain the coolant. Refer to Cooling System Draining and Filling. Remove the engine coolant temperature sensor. Remove the air conditioning condenser. R ...

0.0073