When the 8L90 transmission was first introduced, it was a significant technological advancement. Made by General Motors, this 8-speed transmission is more efficient and lightweight than the previous 6-speed transmissions and was designed for high performance vehicles such as the Chevrolet Silverado, the Cadillac CT6, and Chevrolet Corvette.
While the 8L90 transmission was far superior to previous transmissions at the time, some design flaws were discovered over time. If you happen to have a vehicle with an 8L90 transmission, you may have experienced a few problems. But worry not. Some basic upgrades can correct common issues with your transmission.
Consider the top 5 essential 8L90 transmission upgrades for improved performance.
1. Clutch Packs.
It can help to add extra clutches to some clutch packs in order to increase capacity. Replacing friction plates with high-performance friction material, such as high-energy fibers, allows for smoother shifting and reduction in shuddering.
2. Steel Plates.
The stock steel plates on an 8L90 transmission tend to fail under heavy loads, resulting in poor shifting and slipping clutches. Replacing them with stronger steel plates improves transmission performance with increased torque capacity and improved heat dissipation.
3. Input Shaft.
Upgrading the input shaft on an 8L90 transmission can improve performance for heavy towing and high horsepower situations. The use of 300M alloy steel increases strength, durability, and longevity of your transmission.
4. Valve Body.
Replacing the valve body reduces internal leaks, worn components, and inefficient hydraulic pressure. These problems often lead to sluggish shifting and excessive heat generation, which ultimately shorten the lifespan of your transmission. Upgraded solenoids and pressure regulators can improve performance.
5. Pump
Upgrading the pump on your 8L90 transmission improves fluid flow, which maintains the proper level of lubrication and temperature. This prevents harsh shifting and slipping gears.
*Bonus: Torque Converter
Torque is how a vehicle gets its power. The torque converter is responsible for transferring the power created by the engine to the transmission. By upgrading the torque converter in your 8L90 transmission, you can improve acceleration, towing capacity, and shifting all while reducing wear and extending the lifespan of your transmission.
Why Bother With 8L90 Transmission Upgrades?
There are many reasons that vehicle owners are willing to invest the time and money into upgrading their 8L90 transmissions:
- Keep your current vehicle. If you have a vehicle you love that just happens to have an 8L90 transmission, it may be worth making the necessary upgrades to keep it running. Perhaps the vehicle has sentimental value or you simply enjoy driving it. You don’t have to give up a beloved car or truck due to a faulty transmission.
- Improved performance. 8L90 transmission upgrades significantly improve the performance of your vehicle in a variety of ways from smoother shifting to increased power.
- Costs less than replacing your transmission. Making upgrades or rebuilding your current transmission will most likely cost less than replacing your transmission or buying a new vehicle.
Frequently Asked Questions About the 8L90 Transmission
What is the life expectancy of an 8L90 transmission without upgrades?
A factory 8L90 transmission can last 150,000 to 200,000 miles in some cases with regular upkeep and maintenance.
What vehicles come with 8L90 transmission?
The Chevrolet Silverado, GMC Sierra, Chevrolet Corvette, Chevrolet Camaro, Cadillac CT6, and the GMC Yukon all come equipped with an 8L90 transmission from the manufacturer.
Who Can I Trust to Upgrade My Transmission?
Circle D Transmission is a trusted expert in transmission repair, rebuild, or replacement. If you need 8L90 transmission upgrades or repairs, we specialize in this area of service. We provide upgrades and complete rebuilds, as well as high quality parts.
Call 713-895-7019 or contact us today to learn more or schedule service. You can also order parts directly from our website.