Manual Target Audience:
Enthusiasts, DIY mechanics, independent repair shops specializing in Mercedes-Benz vehicles, and professional automotive technicians. Primarily for those seeking in-depth knowledge and practical repair guidance.
Manual Highlight:
Immediate download availability, focus on technical details, comprehensive repair coverage for specific Mercedes-Benz automatic transmission models.
Languages Supported:
Primarily English (as per product description mentioning technical details and downloadability without impediments, implying a widely accessible language. Specific language may vary based on actual product but English is the most common for global technical documentation).
Estimated Page Count:
200-400 Pages (typical for detailed transmission repair manuals of this era. Exact count not provided, estimation based on scope of coverage.)
Manual Type:
Repair Manual / Service Manual
Format:
Digital Download (PDF or similar e-book format)
Transmission Components:
Torque converter, planetary gear sets, clutch packs, brake bands, hydraulic control unit (valve body), oil pump, governor, kickdown linkage, cooling system, electrical connections (for models with electronic control), shift linkage, internal seals and gaskets.
Diagnostic Procedures:
Troubleshooting guides based on symptoms (e.g., slipping, harsh shifts, delayed engagement), diagnostic flowcharts, pressure testing procedures, electrical circuit diagnosis.
Disassembly And Assembly:
Step-by-step instructions for complete transmission removal, disassembly, component inspection, cleaning, repair, and reassembly. Includes torque specifications for all fasteners.
Rebuild Procedures:
Detailed instructions for rebuilding the transmission, including replacing worn parts like seals, gaskets, clutch plates, bands, and overhaul kits. Information on common wear points.
Adjustment And Calibration:
Procedures for adjusting band servos, checking kickdown linkage, setting neutral safety switch (if applicable), and calibrating control pressures.
Technical Depth:
Comprehensive. Covers from basic maintenance checks to full internal component overhaul and repair. Suitable for experienced DIY mechanics and professional technicians.
File Format Details:
Digital, likely PDF. Searchable text, printable pages, high-resolution diagrams. Compatibility with most modern operating systems and devices.
Diagram Quality:
High-resolution, clear exploded views and line drawings for component identification and assembly guidance.
Binding Type N A:
N/A (Digital format)
Paper Type N A:
N/A (Digital format)
Engine Types Associated:
These transmissions were commonly paired with a wide range of Mercedes-Benz gasoline and diesel engines from the 1980s through the early 1990s. Examples include M102 (2.0L, 2.3L I4), M103 (2.6L, 3.0L I6), M110 (2.8L I6), OM601 (2.3L Diesel I4), OM602 (2.5L Diesel I5), OM603 (3.0L Diesel I6). Specific engine compatibility varies by model year and chassis.
Transmission Type:
4-speed Automatic Transmission
Transmission Variants:
While the core design is similar, the 722.3 is generally the vacuum-controlled version, and the 722.4 often refers to early electronically modulated versions or variations thereof, depending on the specific Mercedes-Benz designation and model year. The manual covers both variations and their unique control systems.
Transmission Control Systems:
Vacuum modulator control (722.3), early electronic control (722.4) interacting with engine management, hydraulic pressure control, torque converter lock-up (on some models).
Transmission Fluid Specification:
Typically requires Dexron II or equivalent ATF (Automatic Transmission Fluid). Always consult specific vehicle documentation for the most accurate fluid type, as specifications may vary slightly by year and application. Recommended fluid change intervals are critical for longevity.
Transmission Fluid Capacity:
Typically around 7-9 liters (7.4-9.5 US quarts) for a complete fluid change, including torque converter. Pan drop and filter change will be less. Exact capacity depends on specific model and torque converter size.
Transmission Control Features:
The 722.3 relied heavily on vacuum modulation for shift quality and line pressure. The 722.4 introduced early electronic control, allowing for finer adjustments to shift points and line pressure based on inputs like throttle position and engine load, improving drivability and efficiency.
Infotainment N A:
N/A (This manual focuses solely on the transmission mechanics, not vehicle infotainment systems.)
Atf Change Interval:
Recommended ATF and filter change every 30,000 to 50,000 miles (48,000 to 80,000 km), or as per the vehicle's specific maintenance schedule. Early models often had shorter intervals. Driving conditions can influence this. It's crucial to use the correct filter and gasket.
Recommended Atf Type:
Dexron II (D) or Dexron III (H) are commonly cited. For modern equivalents, consult the manual or a reputable Mercedes-Benz parts supplier for the most appropriate DEXRON-compatible fluid. Avoid non-ATF fluids. Always check the dipstick and fluid condition during service.
Common Wear Items:
Worn clutch plates, hardened seals and O-rings leading to leaks and pressure loss, governor issues, valve body wear and sticking valves, vacuum modulator diaphragm failure (722.3), electrical connector corrosion on 722.4. Overheating can also accelerate wear.
Preventative Maintenance:
Regular ATF and filter changes, ensuring proper fluid level, avoiding excessive towing or hard acceleration, maintaining engine cooling system performance, and checking for external leaks are key to preventing premature wear.
Mercedes Benz Transmission History:
Mercedes-Benz has a long-standing reputation for robust and technologically advanced powertrains. The 722 family of transmissions represents a significant era in their automatic transmission development, known for durability and smooth operation when properly maintained.
722 Series Evolution:
The 722.3 and 722.4 were evolutionary steps from earlier designs, incorporating improved hydraulics and control mechanisms. They paved the way for more sophisticated electronically controlled transmissions like the 722.5 (5-speed) and subsequent electronically managed units.
Production Period:
These transmissions were predominantly produced and used in Mercedes-Benz vehicles from the early 1980s through the mid-1990s.
Transmission Design Recognition:
While specific awards for these transmissions are not publicly documented, Mercedes-Benz transmissions of this era were generally recognized for their longevity, reliability, and engineering quality, contributing to the brand's reputation for durable vehicles.
