Holden Monaro Transmissions

Welcome to our Transmissions page, where we specialize in everything you need to know about the transmission system of your Holden Monaro. Our expert mechanics are here to ensure your vehicle's transmission is in top condition for optimal performance.

Holden 4L60E Transmission Specifications and Ratios

The Holden 4L60E transmission is a versatile and widely used 4-speed automatic transmission that has been a staple in many Holden vehicles. Known for its durability and efficiency, this electronically controlled transmission is designed to handle both everyday driving and moderate performance demands. It features a lightweight aluminium housing and is compatible with rear-wheel-drive configurations. The gear ratios for the 4L60E are strategically designed to provide a smooth driving experience, with a first gear ratio of 3.06:1, a second gear ratio of 1.62:1, a third gear ratio of 1.00:1, and a fourth gear (overdrive) ratio of 0.70:1. This transmission also includes a reverse gear with a ratio of 2.29:1, offering reliable backing capability. With its robust design and consistent performance, the Holden 4L60E transmission remains a reliable choice for drivers seeking a balance of power and efficiency.

4L60E Transmission Upgrades and Stall Converters for Racing

The 4L60E transmission is a popular choice for racing enthusiasts, and with the right upgrades, it can deliver exceptional performance on the track. Upgrading your 4L60E transmission ensures enhanced durability, quicker shifts, and the ability to handle higher horsepower and torque levels. Key upgrades include heavy-duty clutches, improved valve bodies, and reinforced input/output shafts, all designed to withstand the intense demands of racing. Pairing these upgrades with a high-performance stall converter is essential for maximising off-the-line power. Stall converters allow your engine to reach its optimal RPM range quickly, delivering better acceleration and responsiveness without compromising drivability. Whether you’re building a drag racer or a street/strip setup, investing in quality 4L60E transmission upgrades and a matched stall converter will take your vehicle’s performance to the next level.

Transmission maintenance and fluid checks

The 4L60E transmission, commonly found in GM vehicles, requires the right type of transmission fluid to ensure smooth operation and longevity. For this transmission, the recommended fluid type is DEXRON VI, which is specifically designed to meet its performance needs. When it comes to fluid volume, a full refill typically requires approximately 12 to 13 litres of transmission fluid, depending on the torque converter size and whether the system has been fully drained, including the cooler lines. For a basic fluid change (not a full flush), you may need around 4 to 5 litres. Always consult your vehicle’s manual to confirm the exact specifications and ensure the best performance for your 4L60E transmission.

How to Check and Change the Fluid in a 4L60E Transmission

Maintaining the health of your 4L60E transmission is key to ensuring smooth performance and longevity. Checking and changing the transmission fluid at regular intervals can help prevent costly repairs down the line. Here's a simple guide to get you started.

Step 1: Gather Your Tools and Materials

Before you begin, make sure you have the necessary tools: a jack and jack stands, a socket wrench, a drain pan, a clean funnel, fresh automatic transmission fluid (ATF) suitable for the 4L60E, and a new transmission filter and pan gasket if needed. Refer to your vehicle's manual for the recommended fluid type and capacity.

Step 2: Check the Transmission Fluid Level

Start your vehicle and let it reach operating temperature, as transmission fluid expands when warm. Locate the transmission dipstick, usually found near the rear of the engine bay. Pull it out, wipe it clean, reinsert it fully, then pull it out again to check the fluid level. If the fluid is below the "Full" mark, you may need to add more fluid. While checking the level, inspect the fluid's condition—it should be a bright red colour and free of debris. Dark or burnt-smelling fluid might indicate it's time for a full change.

Step 3: Drain the Old Transmission Fluid

To change the fluid, safely raise your vehicle using a jack and support it with jack stands. Place a drain pan underneath the transmission pan. Carefully remove the bolts on the transmission pan, loosening one side more to allow the fluid to drain in a controlled manner. Be cautious, as the fluid might still be warm.

Step 4: Replace the Filter and Gasket

Once the pan is removed, you'll see the transmission filter. Simply pull it out and replace it with a new one. Also, clean the transmission pan and replace the gasket to prevent leaks when reattaching the pan.

Step 5: Add Fresh Transmission Fluid

Reinstall the transmission pan securely using the bolts. Using the funnel, add the recommended amount of new transmission fluid through the dipstick tube. Be careful not to overfill.

Step 6: Check and Adjust the Fluid Level

Start the engine and let it idle in "Park" or "Neutral." Shift through all the gears to circulate the new fluid, then return to "Park." Recheck the dipstick to ensure the fluid is at the proper level. Add more if necessary, but avoid overfilling as it can cause damage.

Step 7: Dispose of Old Fluid Responsibly

Transmission fluid is toxic and should be disposed of at a proper recycling centre. Most auto parts stores or service centres can assist with this.

By following these steps, you can maintain the performance of your 4L60E transmission and keep your vehicle running smoothly. Regular maintenance is a small investment compared to the cost of major repairs, so don’t delay!