Blog posts of '2024' 'November'

The 8L90 transmission is a high performance option for your vehicle. Created by General Motors, the 8L90 is an 8-speed automatic transmission that is designed to be more efficient and out-perform previous models. Whether you’re an automotive enthusiast, DIY mechanic, or a day-to-day driver, you know that a well-maintained transmission is crucial to vehicle longevity. Here’s what you should know about the 8L90 transmission performance upgrades to get the best from your transmission. 

What is an 8L90 Transmission? 

Regular use of the 8L90 transmission began in 2014. This 8 speed automatic transmission replaced the previous 6 speed transmissions, providing more power with improved fuel-efficiency. It was first introduced in high-power vehicles such as the Chevrolet Silverado, GMC Sierra, GMC Denali, Corvette, Camaro, and several Cadillac models. 

Common Issues 

Despites its performance and efficiency, the 8L90 transmission is not without flaws. Common issues include:

• The torque converter is prone to vibrations at high speeds and ballooning or expanding due to pressure buildup. 

• The input shaft fails to support extreme pressure or weight due to its structural inferiority. 

• The valve body is a complex system designed to facilitate smoother shifting, but it often causes overheating. 

• The C2 clutch assembly results in higher risk of slippage or failure in the overdrive gears (gears 4-8). 

• The oil pan lacks volume, leading to higher oil temperatures due to lack of ventilation space. 

Performance Upgrades for the 8L90 Transmission

The following upgrades can improve performance and reduce the impact of common issues: 

Cooling System: 

• Upgrading the transmission pan provides more space for even heat distribution. 
• Adding a high performance transmission cooler helps regulate temperature.

Internal Components:

• Reinforced clutch packs include higher quality materials that hold up under pressure. 
• Hardened planetary gears reduce wear and tear due to high speeds
• Billet input shaft to replace lower quality factory parts. 
• Replace seals and gaskets with upgrades to prevent leaks. 

Torque Converter: 

• Upgrade your torque convertor according to your vehicle model to meet your specific power and acceleration needs. 

Performance Rebuild Kits 

• Kits are available to rebuild your 8L90 transmission to address problems and improve performance. Stage-specific rebuilds and custom valve body modifications can provide more power and improve shift timing. 
  
  

Maintenance Tips to Improve Longevity of your 8L90 Transmission

• Regular fluid changes. By following the manufacturer recommended schedule for fluid changes you can extend the life of your transmission.

• Use high performance transmission fluid. Reduced friction and higher temperature thresholds are possible with transmission fluid that is designed for high performance. 
• Go to a trusted transmission expert. The 8L90 transmission can be complex and potentially problematic. But with service from the right transmission expert you can upgrade parts or replace your system for better performance and longevity. 
  
  

When To Upgrade 

If your vehicle is currently equipped with an 8L90 transmission, you may want to consider making some upgrades. While your vehicle may be operating well currently, being proactive and addressing some of the common problems with this type of transmission can help you avoid expensive repairs down the road. With a few 8L90 transmission upgrades, you could get many more years out of your vehicle.

Contact Circle D Transmission

Having problems with your 8L90 transmission? Circle D Transmission provides service, upgrades, and complete rebuilds of this complex model. We specialize in vehicle transmissions of a wide variety of makes and models, helping you get the best performance and the most years possible from your vehicle. 

Call 713-895-7019 or contact us today to learn more and schedule service. 

When it comes to major transmission work, we at Circle D Transmission prioritize providing reliable, high-quality solutions. For most cases where your vehicle requires a complete transmission rebuild, we use remanufactured transmissions from either the original equipment (OE) manufacturer or Jasper Engines and Transmissions. 

Here’s why this is the best approach for our clients, explained through five key reasons.

Reason 1: Quality Assurance with Trusted Brands

Using remanufactured transmissions from OE manufacturers or Jasper Engines & Transmissions ensures a high level of quality. These transmissions are produced by industry leaders that have established rigorous standards for performance and durability. Jasper, for example, is known for its meticulous remanufacturing process that restores transmissions to meet or exceed their original specifications. This means that each unit is thoroughly inspected and rebuilt using premium-grade parts, resulting in reliable, high-performance products. By sourcing transmissions from such reputable manufacturers, we can confidently assure our clients that they are receiving the best product available on the market.

Reason 2: Comprehensive Nationwide Warranty

Both OE manufacturers and Jasper Engines & Transmissions offer a robust 3-year or 100,000-mile, whichever comes first, warranty that covers parts and labor. This warranty provides clients with peace of mind, knowing that no matter where they are in the U.S., their investment is protected. Should any issues arise, you can trust that repairs will be taken care of by certified professionals, ensuring you’re never far from quality service. This nationwide warranty is especially important for those who travel frequently or relocate, as it ensures that coverage remains consistent across different regions. The comprehensive nature of this warranty underscores our commitment to providing lasting value and dependable service for your vehicle.

Reason 3: Faster Turnaround Times

Time is valuable, and a lengthy repair process can be inconvenient. By using remanufactured transmissions, we can often minimize the time your vehicle spends in the shop. Unlike custom rebuilds that might take weeks, remanufactured transmissions are usually available more quickly, enabling us to restore your vehicle’s functionality faster and get you back on the road. The streamlined supply chain for these remanufactured units allows for prompt delivery and installation, helping us avoid the typical delays associated with sourcing individual parts and manual rebuilding. This efficiency means less disruption to your daily life and a quicker resolution to your transmission issues.

Reason 4: High Reliability and Performance

Remanufactured transmissions are built with quality control processes. Each unit is tested to confirm it meets stringent operational standards before being sold. This means clients receive a transmission that is as dependable as a new one and sometimes even enhanced for better performance, providing both safety and longevity for your vehicle. Advanced testing procedures, such as dynamometer testing, simulate real-world conditions to verify that the transmission will perform seamlessly once installed. This attention to detail ensures that remanufactured units provide consistent, superior performance with minimal risk of failure.

Reason 5: Cost-Effective Solution

Choosing a remanufactured transmission can often be more cost-effective in the long run. The precision and consistency offered by Jasper and OE manufacturers mean fewer issues down the line, which translates to fewer repair costs and potential savings over time. Coupled with the extensive warranty coverage, this choice is a smart financial decision for vehicle owners. Additionally, the improved reliability of these transmissions means you are less likely to face repeated breakdowns or unforeseen expenses, which can be financially and emotionally taxing. Investing in a remanufactured transmission is an investment in your vehicle’s longevity and your peace of mind.

Why Choose Circle D Transmission?

At Circle D Transmission, we’ve built a strong reputation over nearly 5 decades in business. Clients choose us not only for our expertise in transmission services but also for the trust and confidence we’ve fostered within the community. Our dedicated team ensures that every client receives unparalleled service backed by our commitment to quality and integrity. We take pride in our transparent communication, honest assessments, and dedication to delivering results that exceed expectations. Don’t just take our word for it—check out our Google reviews to see what our clients have to say. From start to finish, we aim to make your experience smooth and satisfactory, reinforcing why we’ve been a trusted name in transmission repair for so long.

Trust Circle D Transmission for your vehicle’s transmission needs and experience the peace of mind that comes with choosing the best in the business. Contact us today to learn more.