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Message: [QUOTE="Charles, post: 294996, member: 103"] The ZF has a factory pump. At least all my ZF6 speeds did, that runs through hardlines just like the Auto pieces up to the lower portion of the radiator through a liquid:liquid exchanger. I simply cut the hardline heading back toward the trans and ran an inline cooler with the factory unit in the radiator. That way the factory unit can keep the temps up in the winter, and take the brunt of the hit when towing, and the additional air:air unit can knock the temp on down with ambient air when towing hard, and the engine coolant itself is getting too warm to offer the trans fluid much delta. For a superduty, the line leaving the driver's side of the radiator is the return line where you would want to tie-in. My tie-in: [IMG]http://inlinethumb23.webshots.com/49814/2595365390082519711S600x600Q85.jpg[/IMG] And I just used a 49 dollar cooler from Advanced. I didn't feel the need to pay nearly 200 dollars for a Ford unit, although one would have been nice. Mounted it like so: [IMG]http://inlinethumb57.webshots.com/31352/2258194110082519711S600x600Q85.jpg[/IMG] [IMG]http://inlinethumb07.webshots.com/50758/2012356950082519711S600x600Q85.jpg[/IMG] Mentioning E40D, makes me think OBS? And if you've already swapped to the ZF5 and driven around, I take it that means there is no factory internal pump... In which case I wouldn't worry about it. I would swap to a ZF6 before I dicked with that. [/QUOTE]

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