CV axle

A torn boot throws grease. A worn outer joint clicks on a full-lock turn. Inner joints clunk on takeoff. 2WD vs 4WD changes the shaft they pull.

Do not buy two axles because one boot ripped. The quiet side can wait if the boot is intact.

DIY

Look, then stop

Hub nut torque and a stubborn spline are how weekend jobs become tow trucks. Experienced DIY with a torque spec can do it.

Confirm which corner clicks. Full-lock left vs right names the outer joint.
Look for grease on the inside of the wheel. That is a boot, not always a dead joint yet.

Tools: None for the look. A torque spec if you turn wrenches.

In the aisle

The parts person does not start with a SKU. They start with the engine and whether it is 2WD or 4WD. Answer from the bay ticket when we have it.

2WD or 4WD?
They will ask — not on the hook yet
Different shafts. This is the parts-person question.
Left or right?
They will ask — not on the hook yet
They are not always the same length.
Which engine / transmission?
They will ask — not on the hook yet
Automatic vs manual and engine torque change the joint.

Parts aisle

Search for year / make / model not on the hook. Not stock. Not TecDoc.

Driveline · bin DRV-1

Name the side and 2WD/4WD before they walk away.

Query: cv axle

Driveline · bin DRV-2

Many are one-time torque nuts.

Query: axle nut

Related: Shocks