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<blockquote data-quote="Trickymissfit" data-source="post: 900315" data-attributes="member: 25383"><p>I've seen the Ford / Navstar do 400,000 miles on the dyno as a test mule, but trust that engine was constantly monitored 24/7. On the otherhand, I've seen the same engine with the Navstar fuel system and valves go close to 700,000 miles as a test mule on the dyno. Dynos are very hard on engines, and manufacturers want them to break. As a comparison; the first year they built the Duramax was something to see! Rarely did an engine last two weeks, and I've seen them let go in 24 hours. Most of these were pre-production mules, and you simply picked up the pieces and tossed them in a crate! The Cummins was the only engine we never blew up, but did actually wear out a couple of them ( close to 35,000 hours on them pulling a 10K load). The typical test was 25K hours, and that computes to about 760,000 miles of driving. The best years for the Duramax, are the 2004 thru 2006 with the code letters 933 stamped on the transmission tag. There's a difference in the gear boxes, and the 933 stamped one if far better quality.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 900315, member: 25383"] I've seen the Ford / Navstar do 400,000 miles on the dyno as a test mule, but trust that engine was constantly monitored 24/7. On the otherhand, I've seen the same engine with the Navstar fuel system and valves go close to 700,000 miles as a test mule on the dyno. Dynos are very hard on engines, and manufacturers want them to break. As a comparison; the first year they built the Duramax was something to see! Rarely did an engine last two weeks, and I've seen them let go in 24 hours. Most of these were pre-production mules, and you simply picked up the pieces and tossed them in a crate! The Cummins was the only engine we never blew up, but did actually wear out a couple of them ( close to 35,000 hours on them pulling a 10K load). The typical test was 25K hours, and that computes to about 760,000 miles of driving. The best years for the Duramax, are the 2004 thru 2006 with the code letters 933 stamped on the transmission tag. There's a difference in the gear boxes, and the 933 stamped one if far better quality. gary [/QUOTE]
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