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I finialy got around to puting my Gu steering box in my Gq and all seemed fine until it gets hot and the noises it makes is like there is air still in the system and it starts pushing fluid out of the cap at full lock, but when it is cold all is good so I compared the systems together and low and behold the Gu has 2 oil coolers on it and nothing has ever been said about adding PS coolers on along with the Gu box