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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #11  
Old 04-28-2014, 11:06 PM
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Marty from Supershafts installed my 4.56 gears on my 13 sport 4x4 . He also did the 4.56 gears on my 07. with the 13 and 6 speed trans i havent noticed mpg loss and doing 75-80 mph on highway rpm's are at about 2500.
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  #12  
Old 04-29-2014, 12:03 PM
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Quote:
Originally Posted by hungovr25 View Post
Marty from Supershafts installed my 4.56 gears on my 13 sport 4x4 . He also did the 4.56 gears on my 07. with the 13 and 6 speed trans i havent noticed mpg loss and doing 75-80 mph on highway rpm's are at about 2500.
I have a 2013 CC 4x4 and down the road I would possible upgrade the rear end. I have read the cost of doing this on the new rams is high and even more difficult with a 4x4. Can you confirm this? Price?
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  #13  
Old 04-30-2014, 10:03 AM
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just call marty at supershafts and ask
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  #14  
Old 05-24-2014, 09:48 AM
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Going back to suoershagt change oil and put true trac in. Def best mod and Marty knows his shit! Highly recommended
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  #15  
Old 05-26-2014, 09:52 AM
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Quote:
Originally Posted by hungovr25 View Post
Marty from Supershafts installed my 4.56 gears on my 13 sport 4x4 . He also did the 4.56 gears on my 07. with the 13 and 6 speed trans i havent noticed mpg loss and doing 75-80 mph on highway rpm's are at about 2500.
What were your original gears on your 2013 before you upgraded?

My 2013 CC 4x4 3.21 8 speed I feel needs to go up to 3.92 or 4.10 down the road.

Not losing much of mpg and adding some low end is awesome! Congrats on the nice upgrade!!

Last edited by jbr; 05-26-2014 at 09:54 AM.
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  #16  
Old 05-27-2014, 10:46 PM
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Bigger gears u won't loose mpg I do 4.10 or 4.56 best person ask Marty. Listen to guy he knows
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  #17  
Old 05-28-2014, 08:59 AM
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Quote:
Originally Posted by moparmike07 View Post
Bigger gears u won't loose mpg I do 4.10 or 4.56 best person ask Marty. Listen to guy he knows
Thanks for the info. I guess I was misinformed and lead to believe that gear change would lead to a loss of mpg. Marty will be on my list of people to call for a possible swap. I may wait until my warranty expires so I don't have possible issues at the dealership.
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  #18  
Old 06-10-2014, 12:05 PM
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I don't think the dealer would even know
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  #19  
Old 06-15-2014, 03:00 PM
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Quote:
Originally Posted by jbr View Post
What were your original gears on your 2013 before you upgraded?

My 2013 CC 4x4 3.21 8 speed I feel needs to go up to 3.92 or 4.10 down the road.

Not losing much of mpg and adding some low end is awesome! Congrats on the nice upgrade!!
I have the 8spd with 3:92 from factory. Its awesome!!!!! I get great mpg as well.
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  #20  
Old 06-15-2014, 03:03 PM
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Quote:
Originally Posted by jbr View Post
Thanks for the info. I guess I was misinformed and lead to believe that gear change would lead to a loss of mpg. Marty will be on my list of people to call for a possible swap. I may wait until my warranty expires so I don't have possible issues at the dealership.
You will lose a little mpgs on the highway cause youll be turning higher rpms. You can offset by installing slightly taller tires but youll loose a little bit of the grunt that you gained from the gears, youll still be improving your situation though.
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