Market Position:
The Mitsubishi 3000GT was a premium sports grand tourer, competing with established European and American performance cars of its era.
Key Competitors:
Toyota Supra, Nissan 300ZX (Z32), Mazda RX-7 (FD), Chevrolet Corvette, Porsche 968.
Technological Advancements:
Known for its advanced technologies such as Active Aerodynamics (retractable front air dam and rear wing), ECS (Electronic Controlled Suspension), AWS (All-Wheel Steering), and sophisticated AWD/ATTESA E-TS systems.
Performance Focus:
Emphasis on powerful twin-turbocharged V6 engines and robust manual transmissions for an engaging driving experience.
Manual Value Proposition:
This manual is essential for owners and technicians seeking to maintain and repair the complex W5MG1 and W6MG1 manual transmissions, critical components of the 3000GT's performance.
Transmission Assembly:
Complete disassembly, assembly, and inspection of the W5MG1 and W6MG1 manual transmissions.
Clutch System:
Inspection, adjustment, and replacement of clutch components (clutch disc, pressure plate, release bearing, slave cylinder).
Drivetrain Components:
Service and repair for driveshafts, CV joints, differential components, and transfer case (if applicable to specific AWD models).
Gear Selection Mechanism:
Troubleshooting and repair of shifter linkage, shift forks, and interlock mechanisms.
Lubrication System:
Manual transmission fluid type, capacity, and change intervals; troubleshooting leaks.
Maintenance:
Regular service, fluid checks, and lubrication recommendations specific to the manual transmission.
Troubleshooting:
Diagnostic charts for common transmission issues like grinding gears, slipping clutch, difficulty shifting, and noise.
Repair:
Detailed step-by-step repair instructions for all internal and external transmission components.
Rebuilding:
Comprehensive guide for complete transmission overhauls, including bearing replacement, seal replacement, and gear inspection.
Component Replacement:
Instructions for replacing specific parts like input shafts, output shafts, synchronizer rings, and shift hubs.
Technical Depth:
Comprehensive, covering everything from basic fluid changes to full transmission rebuilds and advanced diagnostics.
Diagnostic Procedures:
Includes diagnostic flowcharts and troubleshooting guides for identifying the root cause of transmission and clutch system faults.
Searchability:
Searchable text for easy navigation and information retrieval.
Print Quality:
High-resolution, suitable for printing individual pages or the entire manual.
Binding Type:
N/A (Digital download, no physical binding)
Paper Type:
N/A (Digital download, no physical paper)
Licensing:
No expiry dates, unlimited access upon purchase.
File Quality:
High-quality scans ensuring clear diagrams, text, and images for accurate reference.
Engine Code:
6G72 (Naturally Aspirated and Twin-Turbocharged)
Configuration:
3.0L (183 cu in) SOHC/DOHC V6
Aspiration:
Naturally Aspirated and Twin-Turbocharged
Horsepower Na:
222 hp @ 6000 rpm (approx.)
Horsepower Tt:
300 hp @ 6000 rpm (approx.)
Torque Na:
260 lb-ft @ 4500 rpm (approx.)
Torque Tt:
307 lb-ft @ 3000 rpm (approx.)
Fuel Delivery:
Multi-point fuel injection (MPI)
Fuel Type:
Unleaded Premium Gasoline
Ignition System:
Electronic Ignition System (EIS) / Distributorless Ignition System (DIS) on later models.
Standard Transmission:
W5MG1 (5-speed manual transmission)
Optional Transmission:
W6MG1 (6-speed manual transmission) - available on Twin-Turbo models.
All Wheel Drive:
Both transmissions were typically paired with Mitsubishi's advanced All-Wheel Drive (AWD) system, often referred to as 'Sophisticated All-Wheel Drive' or 'ATTESA E-TS' (Electronically Torque Split).
Transfer Case:
Integrated into the AWD system, handling torque distribution.
Gear Ratios 5Speed:
Specific ratios vary, but generally close-ratio for performance (e.g., 1st: 3.047, 2nd: 1.738, 3rd: 1.172, 4th: 0.918, 5th: 0.732, Final: 4.059).
Gear Ratios 6Speed:
More aggressive gearing for enhanced acceleration (e.g., 1st: 3.047, 2nd: 1.913, 3rd: 1.302, 4th: 1.024, 5th: 0.822, 6th: 0.694, Final: 4.059).
Clutch Type:
Hydraulically operated, multi-plate clutch system (often twin-plate clutch on Twin-Turbo models for increased torque capacity).
Transmission Fluid Type:
Typically API GL-4 or GL-5, SAE 75W-90 synthetic gear oil. Refer to manual for exact Mitsubishi specifications.
Transmission Fluid Capacity:
Approximately 2.4 liters (2.5 US quarts) for W5MG1/W6MG1. Verify with manual.
Length:
4,650 mm (183.1 in)
Width:
1,840 mm (72.4 in)
Height:
1,250 mm (49.2 in)
Wheelbase:
2,500 mm (98.4 in)
Curb Weight:
Approx. 1,600-1,750 kg (3,527-3,858 lbs), depending on trim and equipment.
Trunk Capacity:
Limited, designed for grand touring rather than cargo hauling. Specific volume not widely published.
NHTSA Ratings:
Specific NHTSA ratings for this era are not consistently available in a comparable format. However, it was engineered as a high-performance GT with robust chassis and safety systems for its time.
Active Aerodynamics:
Electronically controlled retractable front air dam and rear wing to optimize drag and downforce at different speeds.
All Wheel Steering:
AWS system (on some models) improved handling and stability, particularly at lower speeds and during cornering.
Anti Lock Brakes:
Standard ABS (Anti-lock Braking System) on most models.
Airbags:
Driver and passenger airbags.
Seatbelts:
3-point inertia-reel seatbelts.
Chassis Construction:
Reinforced safety cell and crumple zones designed for occupant protection.
Infotainment System:
Basic infotainment systems common for the era, typically including an AM/FM stereo with cassette player, and later models optional CD players. Speaker systems were usually premium for the time.
Driver Assistance Features:
Key technological features included Active Aerodynamics, ECS (Electronic Controlled Suspension - optional), and AWS (Active Four-Wheel Steering - optional on some models). These systems significantly enhanced handling and performance.
Connectivity Options:
Limited to basic radio and speaker systems; no advanced Bluetooth or USB connectivity.
Powertrain Control Modules:
Sophisticated ECU managing engine, AWD, and ECS systems, requiring specialized diagnostic tools and knowledge for troubleshooting.
Transmission Fluid Change:
Recommended every 30,000 - 60,000 miles (48,000 - 97,000 km) or 2-3 years, depending on driving conditions. Consult owner's manual or this service manual for precise intervals.
Clutch Inspection:
Inspect clutch pedal free play and engagement point periodically, typically at 15,000-mile service intervals. Clutch life varies greatly with driving style.
Engine Oil Type:
5W-30 or 10W-30 synthetic blend or full synthetic, API certified. Consult manual for specific grades.
Coolant Type:
Mitsubishi DiaQueen Super Long Life Coolant (SLLC) or equivalent ethylene glycol-based coolant with phosphates and silicates.
Transmission Wear Items:
Synchronizer rings, clutch components, and input/output shaft bearings are common wear items, especially in high-mileage or aggressively driven vehicles.
Clutch Hydraulic System:
Leaking slave or master cylinders, and air in the hydraulic line can cause shifting problems.
Transfer Case And AWD System:
Leaks from the transfer case seals or differential seals can occur. The AWD system control modules can also be a source of issues if not maintained.
Transmission Shifting Issues:
Difficulty shifting or grinding gears can often be traced to low fluid levels, worn synchronizers, or clutch engagement problems.
Preventative Maintenance:
Regularly check and change transmission fluid using the correct specifications. Inspect clutch operation and fluid levels for the hydraulic system.
Brand Heritage:
Mitsubishi has a long history in motorsports and performance vehicles, with the 3000GT building on the success of models like the Galant VR-4.
Model Evolution:
Introduced in 1990 (for the 1991 model year) as the GTO in Japan and 3000GT elsewhere. Received significant updates in 1994 (for the 1994 model year, often called the 'Series 2' or 'Gen 2') with revised styling, a more powerful engine (up to 320 hp for the TT US spec), and improved aerodynamics. The manual transmission was a key offering throughout its production.
Production Years:
1990-2001
Manufacturing Location:
Japan (Kuwana Plant, Mie Prefecture).
Sales Figures:
Total production was around 80,000 units globally. Sales were strong initially but declined due to rising costs, market shifts towards SUVs, and the complexity of its advanced features.
Car And Driver Awards:
Frequently appeared on Car and Driver's Ten Best lists during the early 1990s, especially the Twin-Turbo models, for its performance and technology.
Automotive Journalism Reviews:
Praised by automotive journalists for its advanced technology, powerful engines, and GT capabilities, though sometimes criticized for its weight and complexity.
Certifications:
No specific external certifications are commonly cited beyond roadworthiness and manufacturer quality standards.
