How To Remove Transmission From 2010 Nissan Murano All-wheel Drive

So, you're tackling a transmission removal on your 2010 Nissan Murano All-Wheel Drive (AWD). That's a significant undertaking, but with the right preparation, tools, and a solid understanding of the process, it's definitely achievable for an experienced DIYer. This guide will walk you through the steps, highlighting potential pitfalls and offering best practices along the way.

Background: The CVT and AWD System in the Murano

The 2010 Murano, particularly with the AWD option, utilizes a Continuously Variable Transmission (CVT), specifically the RE0F10A or similar variant depending on the exact model. Unlike traditional automatic transmissions with fixed gear ratios, a CVT uses a belt (or chain) running between two variable-diameter pulleys (variators). By changing the diameter of these pulleys, the CVT can create an infinite number of gear ratios within its operating range, offering smoother acceleration and potentially better fuel economy.

The AWD system in the Murano is typically an on-demand system. This means that under normal driving conditions, the vehicle primarily operates in front-wheel drive (FWD) to conserve fuel. When the system detects wheel slippage (through sensors monitoring wheel speed differences), it engages a coupling (usually a clutch pack located in the rear differential) to transfer torque to the rear wheels, providing all-wheel drive capability. Understanding this interplay between the CVT and AWD is crucial when disconnecting components during the removal process.

Technical Breakdown: Removing the Transmission

Removing the CVT from a 2010 Murano AWD requires a methodical approach. Here's a step-by-step guide:

1. Preparation and Safety

Safety First!

• Disconnect the Battery: Always disconnect the negative battery terminal to prevent electrical shorts.
• Secure the Vehicle: Use jack stands to safely support the vehicle. Never rely solely on a jack. Ensure the vehicle is on a level surface.
• Wear Appropriate Gear: Safety glasses, gloves, and steel-toed boots are essential.

2. Drain the Transmission Fluid

Locate the transmission drain plug (usually on the bottom of the transmission pan) and drain the fluid into a suitable container. Dispose of the old fluid properly at a recycling center.

3. Disconnect Electrical Connectors and Sensors

Identify and disconnect all electrical connectors attached to the transmission. These will typically include:

• Transmission Control Module (TCM) connector
• Vehicle Speed Sensor (VSS) connector
• Transmission Fluid Temperature (TFT) sensor connector
• Shift solenoid connectors

Label each connector before disconnecting to ensure proper reassembly. Take pictures as you go; they're invaluable later.

4. Disconnect Shift Linkage and Cooler Lines

Disconnect the shift linkage from the transmission. This usually involves removing a retaining clip or bolt. Also, disconnect the transmission cooler lines (typically two lines). Have plugs ready to minimize fluid spillage. The cooler lines can be difficult to reach, so use penetrating oil if necessary.

5. Remove the Driveshaft(s) and Axle(s)

This is where the AWD aspect comes into play. You'll need to disconnect the rear driveshaft from the transmission. This usually involves unbolting the driveshaft flange from the transmission output flange. Then remove the front axles from the transmission. This typically requires unbolting the lower ball joints, disconnecting the sway bar links, and using a slide hammer or axle puller to remove the axles from the transmission. Be extremely careful not to damage the axle seals in the transmission.

6. Support the Engine

Before removing the transmission mounts, you need to support the engine. Use an engine support beam or a jack with a wooden block to support the engine from above. This prevents the engine from tilting or falling when the transmission is removed.

7. Remove Transmission Mounts

Locate and remove the transmission mounts that secure the transmission to the vehicle's frame. There are usually two or three mounts. Support the transmission with a transmission jack before removing the last mount.

8. Remove the Transmission

Carefully lower the transmission using the transmission jack. Ensure that all bolts and connections are disconnected before lowering the transmission. Maneuver the transmission to clear any obstructions, such as the subframe or exhaust components. Once the transmission is clear of the vehicle, inspect the flexplate (drive plate) for any cracks or damage.

Common Issues and Maintenance Concerns

CVTs, including the one in the 2010 Murano, are known for having some specific maintenance considerations:

• Fluid Changes: Regular transmission fluid changes are critical for CVT longevity. Use only the specified CVT fluid (Nissan NS-2 or NS-3, depending on your model). Incorrect fluid can cause serious damage. Check your owner's manual for the correct fluid type and service intervals.
• Overheating: CVTs are more sensitive to overheating than traditional automatics. Avoid prolonged periods of heavy towing or aggressive driving, especially in hot weather. Consider adding an auxiliary transmission cooler if you frequently tow or drive in demanding conditions.
• Belt Slippage: Over time, the CVT belt can wear or slip, leading to performance issues and potential failure. This is often indicated by unusual noises, hesitation, or a loss of power.

Do's and Don'ts / Best Practices

• Do use a transmission jack specifically designed for removing and installing transmissions. It provides better stability and control.
• Do thoroughly inspect all components (flexplate, axle seals, mounts) for wear or damage before reinstalling the transmission.
• Do replace the transmission filter and pan gasket during reinstallation.
• Do use a torque wrench to tighten all bolts to the specified torque values.
• Don't use impact tools on delicate components like the CVT belt or pulleys.
• Don't reuse old transmission fluid.
• Don't force any connections or components. If something is not coming apart easily, double-check that all bolts and connections are removed.
• Don't work under a vehicle supported only by a jack. Always use jack stands.
• Do take your time, pay attention to detail, and document your progress with photos. This will help you during reassembly.

Conclusion

Removing the transmission from a 2010 Nissan Murano AWD is a complex job, but it's manageable with the right knowledge and tools. Remember to prioritize safety, follow the steps carefully, and pay attention to detail. Proper preparation and meticulous execution are key to a successful outcome. If you're unsure about any part of the process, it's always best to consult a qualified mechanic. Replacing the CVT fluid with the correct fluid and at the correct intervals can drastically increase the longevity of the transmission. Good luck!