Subaru Performance Transmission Upgrades
Below is a MRR and PLR article in category Vehicles -> subcategory Trucks-SUVS.
Subaru Performance Transmission Upgrades
Overview
When it comes to enhancing transmission performance, American-made vehicles like Mustangs and Chevelles have an abundance of options. However, Subaru’s 4EAT automatic transmissions have been a challenge due to various factory limitations. This article explores how IPT Performance Transmissions is revolutionizing Subaru automatic transmission upgrades.
Common Issues with Factory 4EAT Transmissions
Stock 4EAT transmissions in Subarus can encounter problems as early as 20,000 miles. Typical issues include poor shift quality, weak components, and improperly configured torque converters. These flaws make the transmission prone to premature failure, especially with engine modifications.
Innovative Solutions from IPT Performance Transmissions
Valve Body Modifications
The valve body is crucial for any performance rebuild. It uses a complex network of components to manage hydraulic pressure for clutch and band applications. Modifying the valve body enhances clutch application rates and increases clamping force, leading to a firmer, performance-oriented shift. This is essential for improving the transmission’s power handling capacity.
Component Upgrades
IPT addresses alignment by replacing critical support bushings to ensure the transmission and crankshaft are perfectly aligned, reducing stress on internal components. Other parts, such as the pinion shaft, front differential ring gear, and planetary gearset, undergo advanced metallurgical treatments. These include heat treating, stress-relief processes, and cryogenic treatment to enhance durability at the molecular level.
Clutch Enhancements
All seals and gaskets are upgraded to withstand high levels of heat and stress. IPT installs performance clutches and steel reaction plates with precise clearances, enhancing durability. Their proprietary six-disk high clutch pack and five-disk 2-4 clutch pack significantly boost torque capacity across second, third, and fourth gears?"by over 25% compared to factory setups. This ensures smoother gear shifts without hitting the rev limiter.
Torque Converter Advancements
A correctly configured torque converter is vital for optimizing performance. IPT’s performance converter not only strengthens the existing model but also allows vehicles to effectively harness maximum engine power. By adjusting the RPM range for launches, these converters act like variable transmissions, necessary when upgrading other vehicle components like turbos and cams. Even stock turbocharged Subarus can see substantial ET reductions with this upgrade.
Conclusion
Thanks to innovators like IPT Performance Transmissions, Subaru owners can now enjoy enhanced performance, durability, and more efficient shifting. These upgrades are no longer exclusive to American-made vehicles. They are available for a wide range of manufacturers, offering solutions to elevate the driving experience.
For more details, visit IPT Performance Transmissions: [IPT Subaru Upgrades](http://www.importperformancetrans.com/subaruauto.shtml)
?" John Lombardo, IPT Performance Transmissions
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