I have the Eaton 18 speed auto , Shifted terrible from new , Had the Eaton rep reprogram it , He loaded the “west coast program” as he calls it ( I’m in BC ) , Now apart from the odd harsh shift , I’ve been very pleased with it , Wouldn’t dream off going back to a standard . I have a low range which can be used for more aggressive downshifting and the Jake works great on the ■■■■■■■ 525 , Mine shifts down seamlessly , or I can just flick the lever manually , never miss a gear lol