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Message: [QUOTE="rowekmr, post: 1526765, member: 10971"] I am seeing a few older F350/450 towing 3/4 car trailers with 6.0L and 7.3L's with loads that I approximate are 22K-25k at least. I know the 7.3L is legendary in longevity but I thought with 275hp (stock) and trans some consider weak it wouldn't be towing heavy. Do you think they mod the engine and have built trans to tow that heavy? Or are they just driving slower and taking it easy on the drivetrain? Same thing with the 6.0L I know when bulletproofed they can be very reliable and the trans is much more stout but weren't they rated to tow about 15-18k in factory form? I was told that heavy towing heats up the oil and at a point the oil cooler won't be able to keep the temps in check? Are they just pushing it or with the mods can they reliably tow 25K or more? [/QUOTE]

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