Dodge cummins 5.9 or 6.7 ?
I'm looking to buy a newer truck for hauling a 5th wheel. For those who have had both 5.9 & 6.7 engines, which do you think is better and why? Right now I'm leaning towards the 5.9, because it has a l...
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up2nogood wrote:Cummins12V98 wrote:up2nogood wrote:Bedlam wrote:
I think when GM started using the Allison around 2001 for its pickups, it made the others up their game. Ford brought out the 5R110 with the 6.0 PSD in 2003 and 6R140 with the 6.7 PSD in 2011 while Dodge held out until 2007 with the introduction of the 6.7 CTD and 68RFE (although still weak compared to the competition)and finally started using the Aisin in 2013.
Explain weak compared to the competition :h
I can personally attest to the 68RFE being a very capable trans. I sold my 2011 RAM Dually with 3:42 gears towing 28-29K combined and it never gave me an issue. Here is the pan at 65K just before I traded the truck. Fluid had about 50K.
I guess time will tell on the 68, no issues with mine so far.
Still waiting for an answer on what made the 48 such a great tranny. I was under the impression they were pretty troublesome .
In 03-07 the factory started taking note on what the aftermarket guys were doing to keep the 48 from falling apart and those years maintained held the power just fine. The 94-02's need to be upgraded if any power was added. At 100K I added a Banks PowerPack kit to my 98 12V and smoked right thru the torque converter. Upgraded upgraded the trans and worked well towing 20K+ with 300HP and 750TQ at the rear wheels.
