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Dodge Ram Cummins Diesel Questions

642 messages,  Last post on Nov 12, 2009 at 5:22 AM

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What is this discussion about? Dodge Ram Pickup 2500, Dodge Ram Pickup 3500, Diesel, Truck


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#638 of 642
Re: What year Dodge Cummins gets the best mileage? [thedesertraven] by ramcharger
Nov 08, 2009 (6:22 pm)
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Replying to: thedesertraven (Nov 08, 2009 3:45 pm)

What you smoking? I have a 04 3500 4x4 with 3.73 gears and can't get 15 mpg with a til wind. It has power, runs good , all that but poor milage. Are you using the built in measure system or your own calculator? They EXAGERATE. But the new Dodges sound like real problems. I am leaning toward a Chevy 4x4 dually mostly for the independant front end.
#639 of 642
Re: 2009 Dodge Diesel [thedesertraven] by kcram HOST
Nov 09, 2009 (12:18 pm)
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Replying to: thedesertraven (Nov 08, 2009 3:36 pm)

It's the axle. Your friend has a 4.10 - the worst axle for fuel economy. Dodge offers a 3.42 with both the manual and automatic... get a Cummins with the 3.42 and the 68RFE automatic (with the double overdrive) and you would have no trouble getting 25+ mpg.
 
kcram - Pickups/Wagons Host
#640 of 642
Re: What year Dodge Cummins gets the best mileage? [ramcharger] by kcram HOST
Nov 09, 2009 (12:27 pm)
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Replying to: ramcharger (Nov 08, 2009 6:22 pm)

I have a 2005 3500 Quad Cab 4x4 dually with the Cummins, 48RE, and 3.73s. At a steady 55 mph, I have no trouble reaching 21 mpg (real, not from the overhead readout)when the truck is empty.
 
You didn't mention which transmission you have, and that will make a difference, as the automatics have a more economical overdrive ratio than the manual (either NV5600 or G56). You also need to keep an eye on your air and fuel filters as well as your tire pressure, and make sure you use a good grade of diesel. While the engine will run on cetane of at least 40, if you can find higher (42 and up), the engine will be much happier. I definitely get better mileage with 42 over 40. Also be careful where you buy fuel... a small local station that might not sell much diesel runs the risk of fuel contamination underground; a station that sees a lot of heavy truck traffic and turns over fuel more often is the place to go.
 
kcram - Pickups/Wagons Host
#641 of 642
crankcase breather smokin by yammerman
Nov 11, 2009 (12:48 pm)
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I have a 2003 2500 cummins and its been a year now since I've bought it and the whole time I've had it the crankcase breather hose smokes excessively. It's not exhaust, or at least it dosnt smell like it, and it's not oil burning. I dont notice other diesel pickups doing this so it must not be normal. I have my trusty Hanes manual(worthless) and it tells me that I can change the crankcase breather but dosent tell me why the excessive smoking...ie what the problem is. I dont know if changing the breather will even help. I consulted a local diesel shop over the phone and they said it sounded like a piston was scored or something--- sounds expensive and i'm hoping its just a simple fix, not somebody trying to screw me out of money. Any suggestions?
#642 of 642
Re: crankcase breather smokin [yammerman] by mckenzie101
Nov 12, 2009 (5:22 am)
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Replying to: yammerman (Nov 11, 2009 12:48 pm)

Yammerman, the smoke you see is most commonly called "Blow By". It's a sure sign that you have trouble coming. Sometimes it is water in your oil and the smoke is actually steam caused by the oil heating up and evaporating the water. You may only need a head gasket replaced or worse case a complete overhaul. Monitor your water to see if you are losing any and keep your oil changed more often. Also keep a close eye on your oil pressure. Depending on how severe the smoke is, you may be able to drive it for a long time by just changing the oil more often.

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