Our transmission shift kit improves the shifting of any 4T65e. It works on the standard and HD versions of the transmission and can be installed in 2 hours. Shift kits can increase the chance of hard part failure but they do keep the clutches from slipping and burning. We do not recommend this kit for cars running 20" wheels.
We found with many kits is the lack of instructions as it relates to shift firmness. Many users find themselves guessing at how firm to set up their kits or end up with a kit that shifts great on the 1-2 and weak on the 3-4. Because our kit comes with more shim sizes than our competitor's kit, you can choose 4 levels of shift firmness for the 1-2 and then again for the 2-3 shift. Only ZZP brings you a kit with the options and instructions to get the precise shift quality you desire and all at a price you can afford.
Perfect time to upgrade to Dexron 6 fluid !
Works on 4t65e '98+ GT/LS, '97+ GTP/GS/SSEi.
Also works on Pontiac Montana!
Detailed instructions can be read here:
Most kits on the market include a filter made in China. It's a few dollars cheaper but ZZP did some investigation and found that while they look the same, there are very subtle differences. Most importantly is the thickness of the filter paper used inside of the filter. Turns out the OEM filters are thicker. This will give better fluid filtration, keep your shifts smooth and help prolong the life of your transmission.