6.7 Cummins Non DEF vs Newer DEF Trucks

[krazymatt]

Hi, I used to have a 2008 6.7 CTD 4x4 which towed great but the fuel economy sucked and I know many folks had issues with the first era of emmissions "bluetec" trucks. Last week I picked up a new 2014 CTD with the DEF setup. My question is what major changes did they do to these trucks to supposedly improve fuel economy? I'm assuming it still has a DPF but is it a more free breathing DPF and exhaust system? The reason I ask is because I think this newer truck is louder and sounds meaner than my 2008 plus it seems to do better on fuel so far. I also notice I can almost swear you can kind of hear the turbo with it idling like the old 5.9s. I've driven about 400 miles and the MPG computer is already averaging 16.7 mpg. I know these newer trucks are mostly geared with 3.42's with the exception of the duallies maybe but I'm just wondering what major changes the exhaust system experienced besides the DEL system?

[ib516]

micpib1 wrote:
Since this thread is a little off topic... my sales man also stated I had the High Output Cummins with 850# of torque, was he misleading me on this also? JH

Yes.

The max the Cummins has with the 68RFE is 370hp/800 lbs-ft.

The 2014 HO (with Aisin Trans) was 385hp/850tq and the 2015 HO is 385hp/865tq.

It goes like this:

2014
350hp/660tq with G56 6 speed manual (2500/3500)
370hp/800tq with 68RFE 6 speed auto (2500/3500)
385hp/850tq with 69ASC Aisin 6 speed auto (3500)

2015
350hp/660tq with G56 6 speed manual (2500/3500)
370hp/800tq with 68RFE 6 speed auto (2500/3500)
385hp/865tq with 69ASC Aisin 6 speed auto (3500)

[micpib1]

Since this thread is a little off topic... my sales man also stated I had the High Output Cummins with 850# of torque, was he misleading me on this also? JH

[Cummins12V98]

NC Hauler wrote:
I'm on the "Right" coast, he's on the "Left" coast....and neither the twain shall meet:)


'at wuz gud, wuznit?

My wife and I just laughed our AZZES off!

Yea I even live on the "LEFT" side of a "LEFT" sided State on the "LEFT" Coast.:o

[Cummins12V98]

Charlie D. wrote:
Since this post has been hijacked so badly I have a question.

My 2006 D/A had the dipstick on passenger side. My 2013 has the dip stick on the drivers side. Do I have the Aisin?;):h

UH.....Me thinks it would be an Alisian

[NC_Hauler]

Charlie D. wrote:
Since this post has been hijacked so badly I have a question.

My 2006 D/A had the dipstick on passenger side. My 2013 has the dip stick on the drivers side. Do I have the Aisin?;):h

Sorry for the hijack....and the answer is NO!, you would still have a Chevy with the D/A combo:W:)

[Charlie_D_]

Since this post has been hijacked so badly I have a question.

My 2006 D/A had the dipstick on passenger side. My 2013 has the dip stick on the drivers side. Do I have the Aisin?;):h

[NC_Hauler]

I'm on the "Right" coast, he's on the "Left" coast....and neither the twain shall meet:)


'at wuz gud, wuznit?

[Bionic_Man]

NC Hauler wrote:

Cummins12V98 wrote:

NC Hauler wrote:

Cummins12V98 wrote:

micpib1 wrote:
NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

As you should! If the Aisin was not available I would still be very happy.

Nothing wrong with the 68RFE...again, the ONLY reason I ordered it was "to see" if it was going to be all I'd heard it was going to be...just ordered it because it was a medium duty tranny...and the plan was/is to keep this truck as my "retirement" truck, (17 months)...thus really the only reason I ordered was more out of curiosity than anything....68RFE would have done the job....just trying something different....

Honestly the only reason I ordered the Aisin is because you did. :B

...guess we're even, the only reason I ordered the B&W 3600 Comparion hitch was because YOU did:)

Do the two of you want a little alone time?? :B

[NC_Hauler]

Cummins12V98 wrote:

NC Hauler wrote:

Cummins12V98 wrote:

micpib1 wrote:
NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

As you should! If the Aisin was not available I would still be very happy.

Nothing wrong with the 68RFE...again, the ONLY reason I ordered it was "to see" if it was going to be all I'd heard it was going to be...just ordered it because it was a medium duty tranny...and the plan was/is to keep this truck as my "retirement" truck, (17 months)...thus really the only reason I ordered was more out of curiosity than anything....68RFE would have done the job....just trying something different....

Honestly the only reason I ordered the Aisin is because you did. :B

...guess we're even, the only reason I ordered the B&W 3600 Comparion hitch was because YOU did:)

[Cummins12V98]

NC Hauler wrote:

Cummins12V98 wrote:

micpib1 wrote:
NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

As you should! If the Aisin was not available I would still be very happy.

Nothing wrong with the 68RFE...again, the ONLY reason I ordered it was "to see" if it was going to be all I'd heard it was going to be...just ordered it because it was a medium duty tranny...and the plan was/is to keep this truck as my "retirement" truck, (17 months)...thus really the only reason I ordered was more out of curiosity than anything....68RFE would have done the job....just trying something different....

Honestly the only reason I ordered the Aisin is because you did. :B

[NC_Hauler]

Cummins12V98 wrote:

micpib1 wrote:
NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

As you should! If the Aisin was not available I would still be very happy.

Nothing wrong with the 68RFE...again, the ONLY reason I ordered it was "to see" if it was going to be all I'd heard it was going to be...just ordered it because it was a medium duty tranny...and the plan was/is to keep this truck as my "retirement" truck, (17 months)...thus really the only reason I ordered was more out of curiosity than anything....68RFE would have done the job....just trying something different....

[Cummins12V98]

micpib1 wrote:
NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

As you should! If the Aisin was not available I would still be very happy.

[micpib1]

NOPE, my 2500 is not the Aisian transmission and I still love my truck. JH

[NC_Hauler]

Nothing wrong with the 68RFE, I think it was/is a much maligned transmission....I never had a problem with it, (though, I only had one from June of 2010 thru May of 2013 and I'll get ragged on not having a truck long enough to actually see anything happen to it.:))

BUT, I purchased the Cummins/Aisin combo in my sig. because this truck is going to be my retirement truck and, Good Lord willing, in about 17 months, we'll start towing around this beautiful country of ours...I wanted the new truck with the new frame, new front and rear suspension and a medium duty diesel strapped to a medium duty tranny...Was more curious than anything else....You get the extra HP & TQ with the Aisin & the Cummins, thus the reason I got it....I have a little over 27,500 miles on it, and it'll be 2 yrs old May 9th. Only issue I've had was to replace the windshield washer motor...It's my daily driver and it's been one great truck thus far.

original topic was non-DEF trucks vs Newer DEF trucks....I've owned a 2010 and 2012, both DRW/ automatic, long bed, crew cab, 4X4 trucks, one a Laramie, one a Longhorn, and now the 13'.....The 13' get's better mpg, towing or empty than the other 2 trucks, that's one benefit I see from the DEF, other is regens aren't as long and don't suck up as much fuel...