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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!!
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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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