2000GT

1967-1970 / Coupe / Japan

All 2000GT problems All workshop issues

Common Transmission and Driveline

Differential Whine

Symptoms

A high-pitched whine from the rear axle that changes with speed. May be more pronounced at certain speeds or under load.

Cause

The limited-slip differential's ring and pinion gears develop wear patterns over decades of use. Incorrect backlash adjustment during previous service or restoration can also cause noise.

Fix

Diagnose whether the noise is gear wear or adjustment.

If adjustment, the differential can be reshimmed.

If gear wear, replacement gears must be sourced, a significant challenge.

Cost: $2,000-8,000 AUD depending on whether gears need replacement.

Cost mentioned in fix

Cost: $2,000-8,000

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// More 2000GT problems

Other known issues

Common Transmission and Driveline

Second Gear Synchro Wear

Crunching or grinding when shifting into second gear, particularly on aggressive downshifts. The synchromesh ring wears thin and can no longer match shaft speeds effectively.

Common Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Carburettor Deterioration and Synchronisation Drift

Rough idle, uneven power delivery, flat spots during acceleration, poor fuel economy, and difficulty starting. The engine may run rich on some cylinders and lean on others.

Critical Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Timing Chain Stretch

Rattling or slapping noise from the front of the engine, particularly on cold startup. In advanced cases, the cam timing shifts, reducing power and causing rough running.

Critical Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Oil System Leaks (Dry Sump)

Oil puddles under the car, oil residue on the engine and chassis, dropping oil level in the external oil tank. Potential oil starvation if leaks are severe.

Common Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Valve Clearance Drift

Ticking noise from the valve train at operating temperature, gradual loss of power, uneven cylinder performance.

Critical Cooling System

Radiator Core Degradation

Overheating, coolant loss, visible corrosion on radiator fins, reduced cooling efficiency.

View all 13 2000GT problems