Originally posted by: iamwiz82
Capacity was NOT the same. The 5.9L(available in 1998 only) had a rating of 5,000lbs, correct, but a 5.2L has a rating of 6,700lbs. Look on MSN Autos. the 4.0L had a higher towing capacity than the 5.9L. And it was all because of the cooling fan.
An electrical fan cannot cool off the engine as well as a mechanical can, but you can eliminate more parasitic power loss. Most other parts of the 5.2L and 5.9L are the same, including dimensions, for the most part. Space was not the issue, because many people swap mechanical fans into their 5.9Ls.