Is atf plus 4 compatible with atf t-iv?

ATF Plus4 and ATF T-IV are both automatic transmission fluids, but they are not fully compatible. ATF Plus4 is specifically formulated for Chrysler vehicles, while ATF T-IV is designed for Toyota and Lexus vehicles. Mixing them could lead to suboptimal performance and may affect transmission operation. It's best to use the fluid recommended by the manufacturer for your specific vehicle.