Differential Repair & Drive Shaft Replacement in Winnetka, CA

Differential & Drive Shaft Experts in Winnetka

The differential is the component that allows your wheels to rotate at different speeds when turning — a critical part of your drivetrain. When it fails, you'll notice it. At A1 Transmission in Winnetka, CA, our technicians have over 35 years of experience diagnosing and repairing front, rear, and all-wheel drive differentials for cars, trucks, and SUVs of all makes and models.

We serve the entire San Fernando Valley including Chatsworth, Canoga Park, Reseda, Northridge, and surrounding communities. Whether you have a whining rear diff or a vibrating drive shaft, we'll find the problem and fix it right.

Signs of a Failing Differential or Drive Shaft

• Whining, howling, or humming noise that changes with vehicle speed
• Clunking or banging noise when accelerating or turning
• Vibration felt through the floorboard at highway speeds
• Difficulty turning, especially at low speeds
• Leaking differential fluid (oily spots under the rear of your vehicle)
• Grinding noise when changing gears or turning
• Shuddering or shaking on acceleration

Differential Services We Offer

• Front and rear differential rebuild and repair
• Ring and pinion gear replacement
• Differential bearing replacement
• Differential fluid change and flush
• Axle shaft repair and replacement
• CV axle and CV joint replacement
• Drive shaft replacement and balancing
• U-joint replacement

Our Diagnostic & Repair Process

1. Free Diagnosis: We perform a thorough inspection of your differential, axles, and drive shaft to identify the root cause of the problem.
2. Transparent Quote: We explain our findings clearly and provide a written estimate before any work begins — no surprises.
3. Expert Repair: Our technicians rebuild or replace only what is necessary, using quality parts that meet OEM specifications.
4. Road Test: We test drive your vehicle after the repair to confirm the noise and vibration are gone and the drivetrain operates correctly.

Differential Fluid Service

Many drivers overlook differential fluid, but it's just as important as engine oil. Contaminated or low differential fluid causes accelerated wear on gears and bearings, leading to expensive repairs. We recommend having your differential fluid inspected every 30,000 miles and replaced per your manufacturer's schedule. Our fluid service removes old, degraded fluid and fills your differential with the correct high-quality lubricant.

Warranty

All differential and drive shaft repairs at A1 Transmission are covered by our 12,000-mile / 1-year warranty on parts and labor. Call today for your free diagnosis.