04/02/2026
Do it once. Do it with ZPAK™.
When GM 4L60E builds fail in the 3–4 clutch pack, it’s usually heat, stress, and OE limitations breaking things down.
Built for rebuilders who don’t want comebacks.
👉 Check out RZP-001, One of our GM 4L60E ZPAK™'s : https://www.raybestospowertrain.com/friction-clutch-packs/rzp-001