Hey guys! Today, we're diving deep into the nuts and bolts of rebuilding a Ford MX transmission. If you're experiencing slipping gears, unusual noises, or just want to ensure your classic Ford is running smoothly, a rebuild might be in order. This guide will walk you through each step, providing you with the knowledge and confidence to tackle this project. Let's get started!

Understanding the Ford MX Transmission

Before we even think about cracking open the case, let's get a handle on what the Ford MX transmission actually is. The Ford MX transmission, also known as the Ford Cruise-O-Matic, is a three-speed automatic transmission that was widely used in Ford vehicles from the late 1950s through the 1960s. It's a robust and reliable transmission, but like any mechanical device, it can wear out over time. Knowing its quirks and features will make the rebuild process smoother. This transmission is known for its durability, but age and use can take their toll. Common issues include worn clutches, leaky seals, and valve body problems. Recognizing these potential issues early can help you anticipate what you'll find during the rebuild.

Why Rebuild? Well, a rebuild isn't just about fixing a problem; it's about preventative maintenance. Over time, the internal components of your transmission, like the clutches and seals, degrade. This leads to reduced performance and eventually failure. Rebuilding restores the transmission to its original specifications, ensuring smooth shifting and reliable operation for years to come. Plus, you get the satisfaction of knowing you did it yourself!

What to Expect During the Rebuild: Rebuilding a transmission is a complex process, but don't let that intimidate you. It involves disassembling the entire transmission, inspecting each component for wear or damage, replacing worn parts, and then reassembling everything according to specific tolerances and procedures. It requires patience, attention to detail, and a good understanding of mechanical principles. But with this guide and a little elbow grease, you can definitely do it. Remember safety first, guys. Always wear safety glasses and gloves when working with tools and solvents, and make sure to properly support the transmission during disassembly and reassembly.

Essential Tools and Components

Okay, before we get our hands dirty, let's make sure we have all the necessary tools and components. Having everything ready will make the process much smoother and prevent frustrating interruptions. This is where the "Ford MX transmission rebuild kit" comes into play. Purchasing a complete kit ensures you have all the necessary seals, gaskets, and friction plates. It's the heart of your rebuild! Here's a breakdown:

• Ford MX Transmission Rebuild Kit: This kit should include all the necessary seals, gaskets, O-rings, and friction clutches. Make sure to get a high-quality kit from a reputable supplier. Don't skimp on this – quality parts are essential for a successful rebuild.
• Sockets and Wrenches: A comprehensive set of both metric and standard sockets and wrenches is crucial. You'll need various sizes to disassemble and reassemble the transmission.
• Torque Wrench: This is absolutely essential for tightening bolts to the correct specifications. Overtightening can damage components, while undertightening can lead to leaks or failures.
• Snap Ring Pliers: These are needed to remove and install the snap rings that hold many of the transmission's components in place.
• Bearing Separator and Puller: This tool is used to remove bearings from shafts. It's not always necessary, but it can be very helpful.
• Soft-Faced Hammer: This will come in handy for gently tapping components into place without damaging them.
• Picks and Scrapers: These are useful for removing old gaskets and seals.
• Transmission Fluid: You'll need fresh transmission fluid to refill the transmission after the rebuild. Make sure to use the correct type of fluid for your Ford MX transmission.
• Cleaning Supplies: You'll need solvent, brushes, and rags to clean the transmission components. Cleanliness is essential for a successful rebuild.
• Assembly Lube: Use assembly lube to lubricate the internal components during reassembly. This will prevent damage during initial startup.
• Manual: A Ford MX transmission service manual is invaluable. It provides detailed instructions, diagrams, and torque specifications. A must-have!

Step-by-Step Disassembly

Alright, let's get down to business! This is where we start taking the transmission apart. Remember to work in a clean, well-lit area and keep track of all the parts as you remove them. Taking photos during disassembly can be incredibly helpful when it comes time to reassemble everything. Organization is key! Before starting, drain the transmission fluid. Place a drain pan under the transmission and remove the drain plug (if equipped) or the transmission pan. Allow the fluid to drain completely. Next, remove the transmission pan. Carefully remove the bolts holding the transmission pan in place. Once the bolts are removed, gently pry the pan loose. Be prepared for some residual fluid to spill out. Clean the pan thoroughly and inspect it for any metal particles, which could indicate internal damage. Now, remove the filter. The filter is usually held in place by a bolt or clip. Remove the filter and inspect it for debris. A clogged filter can cause transmission problems. Next, remove the valve body. The valve body is a complex assembly of valves and passages that control the flow of transmission fluid. Carefully disconnect any electrical connectors and remove the bolts holding the valve body in place. Set the valve body aside in a clean container. Remove the pump. The pump is located at the front of the transmission and is responsible for providing fluid pressure. Remove the bolts holding the pump in place and carefully pull the pump out of the transmission case. Inspect the pump for wear or damage. Remove the rotating assembly. The rotating assembly consists of the input shaft, output shaft, drums, and clutches. Carefully remove the rotating assembly from the transmission case. This may require some maneuvering. Disassemble the rotating assembly. Once the rotating assembly is removed, disassemble it to inspect the individual components. This involves removing snap rings, clutches, and other parts. Inspect each component for wear or damage. Clean all parts thoroughly with solvent and a brush. Pay close attention to the valve body, as it has many small passages that can become clogged.

• Remove External Components: Start by removing any external components such as the torque converter, dipstick tube, and any electrical connectors.
• Drain the Fluid: Position a drain pan under the transmission and remove the drain plug (if equipped). If there's no drain plug, carefully loosen the pan bolts and let the fluid drain out. Be prepared for a mess!
• Remove the Pan and Filter: Once the fluid is drained, remove the transmission pan. Then, remove the filter, which is usually held in place by a bolt or clip.
• Valve Body Removal: Carefully disconnect any linkages or electrical connections to the valve body. Then, remove the bolts holding the valve body in place and gently remove it. The valve body is delicate, so handle it with care.
• Remove the Pump: The pump is typically located at the front of the transmission. Remove the bolts holding it in place and carefully pull it out.
• Rotating Assembly: This includes the drums, clutches, and planetary gears. Carefully remove this assembly, noting the order and orientation of the components. Taking pictures at each step can be a lifesaver!

Inspection and Cleaning

Okay, with the transmission completely disassembled, it's time to inspect each component for wear, damage, or any other issues. This is a critical step, as it determines which parts need to be replaced. Remember, a thorough inspection now can save you headaches down the road. Cleanliness is key here! Use a solvent tank or parts cleaner to thoroughly clean each component. Remove all traces of old fluid, grease, and debris. A clean part is easier to inspect and ensures proper operation. Inspect all seals and gaskets for cracks, tears, or deterioration. Replace any seals or gaskets that are not in perfect condition. Check all friction plates and steel plates for wear or burning. Friction plates should have a good amount of friction material remaining. Steel plates should be flat and free of discoloration. Inspect all gears for chipped, broken, or worn teeth. Check all bearings for roughness or play. Bearings should spin smoothly and quietly. Inspect the valve body for stuck or damaged valves. Clean all passages in the valve body with compressed air. Check the transmission case for cracks or damage. Pay close attention to the areas around the bolt holes.

• Clutches and Steels: Inspect the clutch plates for wear and burning. Replace any that are worn or damaged. Check the steel plates for warping or discoloration.
• Seals and Gaskets: Replace all seals and gaskets. These are inexpensive and essential for preventing leaks.
• Bearings and Bushings: Inspect all bearings and bushings for wear or damage. Replace any that are questionable.
• Gears and Shafts: Check the gears for chipped or broken teeth and the shafts for wear or bending.
• Valve Body: The valve body is a complex hydraulic control unit. Clean it thoroughly and inspect the valves for free movement. If you suspect problems with the valve body, consider having it professionally rebuilt.

Reassembly: Putting It All Back Together

Now comes the fun part – putting everything back together! This is where your attention to detail really pays off. Follow the service manual closely and take your time. Lubrication is key during reassembly. Use transmission assembly lube to coat all moving parts. This will prevent damage during initial startup. Install the rotating assembly. Carefully install the rotating assembly into the transmission case. Make sure all components are properly aligned. Install the pump. Install the pump into the transmission case and secure it with the bolts. Torque the bolts to the specified torque. Install the valve body. Carefully install the valve body into the transmission case. Connect any electrical connectors and secure it with the bolts. Torque the bolts to the specified torque. Install the filter. Install the filter and secure it with the bolt or clip. Install the transmission pan. Install the transmission pan and secure it with the bolts. Torque the bolts to the specified torque.

• Install the Rotating Assembly: Carefully reinstall the drums, clutches, and planetary gears in the correct order and orientation. Make sure all snap rings are properly seated.
• Install the Pump: Install the pump with a new gasket, ensuring it's properly aligned.
• Valve Body Installation: Carefully reinstall the valve body, making sure all linkages and electrical connections are properly connected. Torque the bolts to the specified torque.
• Pan Installation: Install a new pan gasket and reinstall the transmission pan. Torque the bolts to the specified torque.
• Final Checks: Before installing the transmission back into the vehicle, double-check all connections and ensure that everything is properly tightened.

Final Steps and Installation

With the transmission reassembled, it's time for the final steps before installation. Before installing, rotate the input shaft to make sure everything moves freely. Once you have installed the transmission, fill it with the correct type and amount of transmission fluid. Start the engine and let it idle for a few minutes. Check for leaks. Shift the transmission through all the gears and check for smooth operation. If all goes well, take the car for a test drive. Pay attention to the shifting and listen for any unusual noises. If you experience any problems, recheck your work and consult the service manual.

• Torque Converter Installation: Carefully install the torque converter, making sure it's fully seated.
• Installation: Install the transmission back into the vehicle, following the manufacturer's instructions.
• Fluid Fill: Fill the transmission with the correct type and amount of fluid.
• Test Drive: Take the vehicle for a test drive and check for proper shifting and operation.

Rebuilding a Ford MX transmission is a challenging but rewarding project. With patience, attention to detail, and the right tools, you can restore your classic Ford to its original glory. Good luck, and happy wrenching!

Disclaimer: This guide is intended for informational purposes only. Always consult a qualified mechanic for any repairs or modifications to your vehicle.