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Old 09-10-2015, 05:04 PM   #21
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(Thread hijack)

So on my new 2015 RAM 2500 6.7 Cummins with 1425 miles I should be ok on my first tow tomorrow?

Trading in a Jayco 32BHDS for a FR Vengeance 25v Toy Hauler.

Mel
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Old 09-10-2015, 06:31 PM   #22
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Quote:
Originally Posted by mele View Post
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So on my new 2015 RAM 2500 6.7 Cummins with 1425 miles I should be ok on my first tow tomorrow?

Trading in a Jayco 32BHDS for a FR Vengeance 25v Toy Hauler.

Mel
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Old 09-10-2015, 06:43 PM   #23
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Its under warranty so hook it up and go.
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Old 09-10-2015, 06:51 PM   #24
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My 2015 Ram diesel manual says the engine requires no break-in however the drivetrain does. No towing for the first 500 miles and then don't exceed 50mph for the first 500 miles of actual towing. I made it to the first 500 miles without towing. Towing the next 500 at 50mph is another story. :-)
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Old 09-10-2015, 07:57 PM   #25
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Yeah... I got to drive about 90 miles to the dealer towing the old trailer to trade in and pick up our new toy hauler... Don't know if I can keep it under 50....
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Old 09-10-2015, 08:02 PM   #26
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Diesel engine break-in before towing

The owner's manual for my 2014 Ram 2500 6.7L diesel says not to tow for the first 500 miles, then not to exceed 50 mph for the next 500 miles. As Ninback stated, that's another story, especially when it concerns I-81 in Penn.
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Old 09-10-2015, 08:04 PM   #27
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My dealer told me don't worry about just tow it.



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Old 09-10-2015, 08:40 PM   #28
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At DD school (1999) they stressed that the only thing needing "break in" was rings, and that was actually "wear in " or proper seating. A diesel that is not pulling hard will not develop a good piston ring seal or seat because the "keystone " ring design needs high cylinder pressures to seat.If ran easy during the first100 hrs or so the cylinder walls will glaze and the rings will never seat properly.New engines were run on a dyno at 50% then 75% load for no more than 20 minutes,cooled off and run at 90% load for 10 minutes.At no time were they "lugged" which was described as the point where additional fuel did not result in a rpm increase.These were 53 and 71 series engines destined for marine applications.I used this same logic when I got my new 7.3 ,driveing it normally for a hundred miles,then hooking up to my equipment trailer loaded at about 16k lbs and pulled it up to where we were building the house we live in now,325 miles,and then back again 325 mi.I showed it no mercy and today at 200000 miles it pulls just as hard and uses no oil between changes of 5000 miles.Thats all I can say about that.

edit) a couple years later at Cummins school for the 903 marine engines they were basically run the same way befor shipment.
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Old 09-10-2015, 08:55 PM   #29
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The owner's manual for my '12 Ram 3500 with a Cummins had the cautions about not towing for the first 500 miles, but it also had a recommendation to work the truck under heavy load before reaching 6,000 miles. As noted above, the load helps seat the rings and improve both power and economy.
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Old 09-11-2015, 06:41 AM   #30
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my Duramax towed the day I bought it. Semi trucks and farm tractors don't get a break-in, they go to work, like diesels were meant to do.
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