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Seeing as the 7.3 transmission cooler was smaller than the 6.0. I ended up buying a Tru Cool 4739 and took it to my mechanic. He said that the cooler i brought him him was the same size as the one that was on it. I looked at it and it looks like it had been on there a while and appears it maybe the stock one. The one on there appears to pretty big. Would there be any difference in that one and the Tru Cool? What is the GVWR rating on the stock 7.3? Thanks<!-- / message --><!-- BEGIN TEMPLATE: ad_showthread_firstpost_sig --><!-- END TEMPLATE: ad_showthread_firstpost_sig --><!-- sig -->