Chevrolet Sonic Repair Manual: Synchronizers Cleaning and Inspection

Chevrolet Sonic Repair Manual / Powertrain / Transmission/Transaxle / Manual / Transmission Assembly / Synchronizers Cleaning and Inspection

Note:

When servicing the synchronizers, retain them in the order that they are removed. Mark the parts to ensure the correct position for inspection and assembly.

Clean all the synchronizer parts in a suitable cleaning solvent and air dry all the parts.
Inspect the 1st/2nd gear, 3rd/4th gear, and 5th gear synchronizer hubs for a force fit on the main shaft.
Replace synchronizer hubs that do not require a force fit.
Inspect the synchronizer hubs for wear on the external splines. A stepped effect on the teeth, due to wear, may cause shift concerns.
Replace a worn hub.
Correct the cause, such as, but not limited to the following conditions:

Engine related vibrations
Driving at a low speed in a high gear
Defective vibration damper or crankshaft

Inspect the synchronizer sleeve teeth (1) for the following conditions, which may cause shift concerns:

Grated teeth
Chipped off teeth
Blunted teeth

Inspect the synchronizer sleeve detent stops (2) for wear or for being chipped off.

Replace the synchronizer assembly if the teeth or stops show the above conditions.

Inspect the synchronizer blocker rings for worn away grooves (1).

Replace the blocker ring assembly if the blocker ring grooves are worn.

Inspect the synchronizer blocker rings for worn shift teeth.

Inspect the internal ring for being warped or damaged.

Inspect the outer ring for worn grooves.

Replace the synchronizer assembly for any of the above conditions.

Install the synchronizer blocking rings to the correct speed gear.

Inspect the braking effect of the blocking ring. Turn the blocking ring in one direction while pushing to the gear cone. Ensure the ring locks.

If the ring does not lock, replace the synchronizer assembly.

Inspect the pressure pieces (1) for wear or damage.

Replace the worn pressure pieces.

Synchronizers Assemble

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 ...

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 ...

Other materials:

Fuel Tank Filler Door Latch Housing Replacement
Fuel Tank Filler Door Latch Housing Replacement Callout Component Name Preliminary Procedures Remove the rear wheelhouse panel liner. Refer to Rear Wheelhouse Liner Replacement. Remove the fuel tank filler door. Refer to ...

Master Cylinder Bench Bleeding
Warning: Refer to Brake Fluid Irritant Warning. Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution. Secure the mounting flange of the brake master cylinder in a bench vice so that the rear of the primary piston is accessible. Remov ...

Brake Rotor Refinishing
Special Tools CH-41013 Rotor Resurfacing Kit CH-42450-A Wheel Hub Resurfacing Kit For equivalent regional tools, refer to Special Tools. Warning: Refer to Brake Dust Warning. Note: The disc brake rotors do not require refinishing as part of routine brake system servic ...

0.0076