4T65E Automatic Transmission Shift Kit

The ZZPerformance 4T65E Shift Kit offers enhanced transmission performance by speeding up shift times. This kit is engineered to work with both standard and HD versions of the 4T65E transmission and can be installed in approximately 2 hours. It aims to provide distinct shift firmness levels for various gear changes. The kit's design allows for customization, with multiple shim sizes included to enable adjustments for shift firmness. Unlike some competitors, ZZP provides comprehensive instructions to guide users in setting up their kits for desired shift quality, avoiding common issues like inconsistent firmness between gears. The package contains various sized shims, a new transmission filter, and detailed instructions. It is recommended to upgrade to Dexron 6 fluid during installation. This kit is compatible with 4T65e '98+ GT/LS, '97+ GTP/GS/SSEi, and also works on Pontiac Montana. It is important to note that while this shift kit can increase clutch life, it may also increase the risk of hard part failure. ZZPerformance specifically recommends against its use in vehicles equipped with 20-inch wheels due to the heightened risk of input shaft breakage caused by increased rotational weight.