Royal Purple Max-Gear® is recommended for use in truck, RV / Motorhome, and automotive front and rear differentials, manual transmissions and lower gear units of marine engines that specify the use of an API GL-5 or GL-4 fluid.  Max Gear® is an ultra-tough, high performance, GL-5 automotive gear oil designed to provide maximum protection to heavily loaded gears while maximizing power through the drive train.  It outperforms other GL-5 gear oils because it combines the highest quality synthetic oils with Royal Purples proprietary Synslide® additive technolog ...

Royal Purple Max ATF Automatic Transmission Fluids are a synthetic, high performance, longlife, multipurpose, automatic transmission fluid.  High performance lubricant manufacturer Royal Purple has re-formulated its Max ATF® automatic transmission fluid to meet the specifications of wider range of transmissions. Max ATF® is a long-life transmission fluid that’s proven to improve performance. It’s been recognized for its ability to significantly reduce friction, so a vehicle can send more power to the ground. It’s also been proven to reduce operating temperat ...