Description
4R100 Transmission and Torque Converter
Our 4R100 remanufacturing process and performance upgrades have made this transmission one of the most durable and reliable units in the industry. To deliver superior performance and long-term durability, we implement several critical enhancements. Each 4R100 transmission includes a heavy-duty recalibration kit designed to reduce slippage and increase clutch longevity. We address known OE design flaws by using an upgraded locking snap ring for the coast clutch and a spiral lock snap ring for the forward clutch, eliminating premature failure points. A one-piece rear case bushing improves internal fluid flow and lubrication, while the center support is precision-machined and modified to accept a snap ring for added stability. Our upgraded pressure regulator and boost valve system helps eliminate delayed engagement, harsh shifting, and torque converter shudder.
Every remanufactured 4R100 transmission undergoes our exclusive Tru-Flat stator qualification and machining process for maximum precision. For diesel and V10 applications, we include a completely upgraded long-spline center shaft drum and an HD billet single-clutch torque converter to handle high torque demands. The pump is fully remanufactured with new line bore bushings to eliminate leaks and ensure consistent fluid flow and durability. Each torque converter is rigorously tested for lock-up functionality, concentricity, balance, and leaks. These upgrades go beyond OEM standards, eliminating common issues such as front seal leaks, premature bushing wear, and vibration. All internal bushings are replaced with performance-spec components, and every bushing and machined surface is polished to a mirror-like OE finish of 15 RA or better, ensuring superior fluid dynamics and optimal transmission pressure regulation.

