Superior GM 4T65E AFL Valve Repair Kit Buick Oldsmobile Cadillac Pontiac Chevrolet. Install Superior's K098 AFL VALVE FIX, The newly Designed AFL valve and spring combo along with a simple cup plug will stop the leak! And since the valve's "Superior" design spreads the loads across the entire length of the rear casting, its along term Simple Solution sure to stop wear and leaks in it's tracks! The valve kit is quick and easy to install without purchasing extra tools, reamers or costly replacement Valves and Sleeves.