I just loaded our 03 PILOT with (4) bikes, two adults and two 20" kids bikes; with three bike adapters for my wife and girls bikes..A little sag on the back of the PILOT. I pick this brand of bike rack cause the bike rack sway back without removing of the bikes of the rack to access the rear door. Its a little heavy but there is a trick to it. I just have the Curt trialer hitch class III (13328) without the ATF & P/S cooler kit.

Do I need to install the ATF & P/S cooler? If I only using the hitch to haul (4) bikes and cargo carrier hitch?