The 1968 Ford C6 transmission is a heavy-duty automatic gearbox renowned for its strength and reliability, designed for high-performance vehicles and trucks. This manual serves as a detailed guide for rebuilding and maintaining the C6, ensuring optimal performance and longevity through precise instructions and technical specifications.
1.1 Overview of the Ford C6 Transmission
The Ford C6 is a three-speed automatic transmission known for its durability and strength, widely used in Ford vehicles from the 1960s to the 1990s. Designed for high-torque applications, it features a cast-iron construction, making it highly reliable for both passenger cars and trucks. Its robust gear train and torque converter design contributed to its popularity among enthusiasts and professionals alike. This transmission’s reputation for longevity and performance has made it a favorite for rebuilding and restoration projects, especially for classic Ford models.
1.2 Importance of a Rebuild Manual
A rebuild manual is essential for successfully overhauling the Ford C6 transmission. It provides detailed, step-by-step instructions, diagrams, and specifications needed to ensure accuracy and avoid costly mistakes. The manual covers disassembly, inspection, and reassembly processes, helping users maintain factory specifications. For both professionals and DIY enthusiasts, it serves as a critical resource, offering torque specifications, troubleshooting tips, and alignment procedures. Without a rebuild manual, achieving a reliable and high-performance transmission rebuild becomes significantly more challenging.
History and Applications of the Ford C6 Transmission
The Ford C6 transmission was produced from 1966 to 1996, becoming a staple in Ford’s lineup for heavy-duty applications. Known for its durability, it was widely used in F-Series trucks, Broncos, and larger passenger vehicles, earning a reputation as a reliable workhorse for both on-road and off-road use.
2.1 Year Range and Production
The Ford C6 transmission was produced from 1966 to 1996, spanning over three decades. Known for its durability, it became a backbone for Ford’s heavy-duty applications. The C6 was widely used in F-Series trucks, Broncos, and larger passenger vehicles, earning a reputation as a reliable workhorse. This manual covers the entire production range, ensuring comprehensive guidance for rebuilding and maintaining the C6 transmission, regardless of the model year or application.
2.2 Vehicles Equipped with the C6 Transmission
The Ford C6 transmission was widely used across various models from 1966 to 1996. It was a staple in F-Series trucks, Broncos, Fairlanes, Galaxies, LTDs, Rancheros, Thunderbirds, and Torinos. Additionally, it was featured in Mercury vehicles like the Comet and Lincoln models. This versatility made the C6 a reliable choice for both everyday driving and heavy-duty applications, ensuring its popularity across multiple vehicle lines during its production run.
Tools and Materials Required for the Rebuild
A slide hammer, bearing driver, and torque wrench are essential tools. Rebuild kits, gaskets, seals, and bearings are critical materials for a successful C6 transmission overhaul.
3;1 Essential Tools for the Rebuild Process
The right tools are crucial for a successful C6 rebuild. A slide hammer is necessary for removing the torque converter and other press-fit components. A bearing driver ensures proper installation of bearings without damage. Additionally, a torque wrench is essential for applying precise torque specifications to bolts and fasteners. Specialized tools like a clutch pack compressor and seal installer are also required. These tools help maintain precision and safety during the disassembly and reassembly process.
3.2 Recommended Rebuild Kits and Parts
A high-quality rebuild kit is essential for a successful C6 transmission overhaul. Kits typically include gaskets, seals, bearings, and clutch packs. Ensure all parts are genuine or OEM-equivalent for durability. A comprehensive kit from reputable suppliers like ATSG or Summit Racing is recommended. Additionally, consider upgrading to heavy-duty components for enhanced performance. Avoid using low-quality or used parts, as they can lead to premature failure. Always cross-reference parts with your manual to ensure compatibility and correctness.
Step-by-Step Rebuild Process
The rebuild begins with disassembly, followed by thorough inspection and cleaning of components. Reassembly involves precise alignment of parts, with torque specifications and adjustments detailed in the ATSG manual for accuracy and reliability. Testing ensures proper function before installation. This systematic approach guarantees a successful overhaul, restoring the transmission to peak performance;
4.1 Disassembly of the C6 Transmission
Disassembly begins with removing the transmission pan and filter, followed by the servo cover. Carefully extract the input shaft and bearing, then the low-reverse clutch hub and one-way clutch. Remove the band and retaining clips, ensuring all components are thoroughly inspected and cleaned. Use specialized tools like a slide hammer for bearing removal. Document each step to ensure proper reassembly. This meticulous process is crucial for identifying worn or damaged parts that require replacement or refurbishment.
4.2 Inspection and Cleaning of Components
Inspection involves examining all components for wear, damage, or contamination. Gears, bearings, and clutch packs must be checked for scoring or excessive wear. Clean all parts using a mild solvent and compressed air to remove debris. Replace any seals or gaskets showing signs of deterioration. Use a micrometer to measure critical surfaces, ensuring they meet factory specifications. Proper cleaning and inspection are essential to prevent reassembly issues and ensure optimal transmission performance after the rebuild.
4.3 Reassembly and Alignment of Parts
Reassembly begins with the servo cover, coating its gasket with petroleum jelly for a secure seal. Align the low-reverse clutch hub and one-way clutch with the inner race. Install the servo spring on the piston rod and secure with retaining bolts. Ensure the identification tag is under one of the cover bolts. Properly align all components, verifying they meet factory specifications. This step is critical for ensuring smooth transmission operation and preventing future issues.
Technical Specifications and Tolerances
This section provides critical technical details, including torque specifications, bearing tolerances, and fluid requirements, ensuring precise rebuild alignment with factory standards for optimal performance and durability.
5.1 Critical Measurements and Adjustments
Accurate measurements and adjustments are crucial for the C6 rebuild. Ensure proper clearance between components, such as bearing tolerances and gear backlash. Use precision tools to verify dimensions, and adjust clutches and bands according to specifications. Correct endplay and pinion depth are vital for smooth operation. Refer to the ATSG manual for detailed torque values and adjustment procedures to maintain optimal transmission performance and prevent premature wear.
5.2 Torque Specifications for Bolts and Fasteners
Adhering to correct torque specifications is essential for the C6 rebuild. Use a torque wrench to ensure accuracy. Fasteners such as transmission pan bolts typically require 12-15 ft-lbs, while others like the servo cover bolts may need 25-30 ft-lbs. Always consult the ATSG manual for specific values to avoid over-tightening or under-tightening, which can lead to leaks or component damage. Proper torque ensures sealing integrity and structural strength, critical for optimal transmission performance and longevity.
Common Issues and Troubleshooting
Common issues with the C6 transmission include slipping gears, fluid contamination, and worn clutch packs. Use the ATSG manual to identify and address these problems effectively.
6.1 Identifying and Addressing Common Problems
Common issues with the C6 transmission include slipping gears, fluid contamination, and worn clutch packs. Use the ATSG manual to diagnose problems like low-reverse clutch failure or servo cover leaks. Addressing these issues requires replacing worn components and ensuring proper alignment during reassembly. The manual provides step-by-step guidance for identifying faults and implementing effective repairs, ensuring the transmission operates smoothly after the rebuild.
6.2 Diagnosis of Transmission Failures
Diagnosing C6 transmission failures involves identifying symptoms like slipping gears, erratic shifting, or fluid contamination. Use the ATSG manual to perform thorough inspections, such as checking fluid condition and looking for worn components like clutch packs or seals. Proper diagnosis ensures accurate repairs, preventing minor issues from escalating into major overhauls. Follow the manual’s troubleshooting guide to pinpoint problems and address them effectively during the rebuild process.
Maintenance and Upkeep After Rebuild
Regular fluid changes with Mercon, filter replacements every 15,000 miles, and monitoring transmission temperature ensure optimal performance and longevity of the rebuilt C6 transmission.
7.1 Fluid Recommendations and Changing Intervals
For the 1968 Ford C6 transmission, use Mercon or equivalent ATF for optimal performance. Change the fluid every 15,000 to 30,000 miles, depending on usage. Always check the dipstick for proper fluid levels and condition. Replace the transmission filter every 15,000 miles to prevent contamination. Use a high-quality filter to ensure cleanliness. Avoid using synthetic fluids unless specified by the manufacturer. Regular fluid maintenance prevents wear and overheating, ensuring long-term transmission health and reliability.
7.2 Tips for Long-Term Transmission Health
Avoid extreme temperatures and heavy towing without a transmission cooler. Monitor fluid levels and condition regularly. Inspect for leaks and address them promptly. Ensure proper installation of rebuilt components, aligning parts correctly. Schedule regular maintenance, including cooler line and filter inspections. Consult a detailed manual for specific guidance. Avoid aggressive driving to reduce wear and tear. Proper care ensures the C6 transmission remains reliable and durable, minimizing the risk of premature failure and extending its service life effectively.
The Role of the ATSG Rebuild Manual
The ATSG manual is a comprehensive guide for rebuilding the 1968 Ford C6 transmission, offering detailed step-by-step instructions, diagrams, and technical specifications to ensure a successful overhaul.
8.1 Features of the ATSG C6 Manual
The ATSG C6 manual offers detailed step-by-step instructions, high-quality diagrams, and precise technical specifications. It covers disassembly, inspection, and reassembly processes, ensuring accuracy. The manual is formatted in paperback and spans 78 pages, providing comprehensive coverage for Ford, Lincoln, and Mercury models from 1966 to 1996. It includes essential information on tolerances, torque specifications, and best practices, making it an indispensable resource for both professionals and DIY rebuilders. Its clear layout and thorough content simplify the complex rebuild process.
8.2 Why the ATSG Manual is Essential for DIY Rebuilds
The ATSG C6 manual is a must-have for DIY rebuilds due to its comprehensive guidance and clarity. It provides detailed, easy-to-follow instructions, making complex processes manageable for enthusiasts. The manual includes essential diagrams, torque specifications, and troubleshooting tips, ensuring accuracy and confidence. Its focus on tolerances and technical details helps avoid costly mistakes. Whether you’re a novice or experienced, the ATSG manual offers unparalleled support, making it indispensable for a successful and stress-free C6 transmission rebuild.
Safety Precautions and Best Practices
Always wear protective gear, use proper tools, and ensure the transmission is securely supported. Work in a well-ventilated area and follow chemical safety guidelines meticulously.
9.1 Safety Measures During the Rebuild
Always wear protective gear, including gloves and safety glasses, when handling transmission components. Ensure the transmission is securely supported by jack stands to prevent accidents. Use proper tools to avoid slipping and damaging parts. Work in a well-ventilated area to prevent inhaling harmful fumes from cleaning agents or lubricants. Keep a fire extinguisher nearby and avoid wearing loose clothing that could get caught in tools or moving parts. Regularly inspect tools and equipment for wear or damage. Properly dispose of hazardous materials like old transmission fluid and filters. Follow all chemical safety guidelines when using solvents or sealants. Maintain a clean workspace to minimize tripping hazards and ensure clear visibility. Be cautious when handling heavy components, as they can cause injury if dropped. Avoid over-tightening bolts or fasteners, as this can lead to damage or injury during reassembly. Never smoke or use open flames near flammable substances like transmission fluid or cleaning agents. Keep children and pets away from the workspace to ensure their safety. Always refer to the ATSG manual for specific safety recommendations related to the C6 rebuild process. By adhering to these safety measures, you can protect yourself and ensure a successful rebuild.
9.2 Environmental Considerations for Disposal
Proper disposal of transmission fluids, filters, and hazardous materials is crucial to protect the environment. Always drain fluids into sealed containers and recycle them through authorized facilities. Transmission filters and metal components should be disposed of according to local regulations. Avoid pouring chemicals or fluids down drains, as they can contaminate water systems. Use eco-friendly cleaning agents when possible and ensure all rags are disposed of properly. Refer to the ATSG manual for guidance on handling and recycling transmission-related waste responsibly.
Completing the 1968 Ford C6 rebuild is rewarding, ensuring optimal performance and longevity. With the ATSG manual, even first-time rebuilders can achieve professional results confidently.
10.1 Final Thoughts on the Rebuild Process
Rebuilding the 1968 Ford C6 transmission is a challenging yet rewarding endeavor. With the ATSG manual as your guide, you’ve successfully navigated disassembly, inspection, and reassembly. Patience and attention to detail are key to ensuring long-term reliability. The process not only restores performance but also fosters a deeper understanding of transmission mechanics. Congratulations on completing this intricate project—you’ve earned the satisfaction of reviving a piece of automotive history!
10.2 Encouragement for First-Time Rebuilders
Embarking on your first C6 rebuild is a bold step, but with determination and the right resources, it’s entirely achievable. The ATSG manual provides clear, step-by-step guidance, making the process manageable even for newcomers. Remember, every challenge overcome builds confidence and skills. Take pride in reviving your transmission—it’s a testament to your dedication and hands-on problem-solving. Completing this project not only saves money but also connects you to a tradition of automotive restoration and DIY excellence.