4.10 OR 4.56
Veteran
Joined: Aug 2005
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RE: 4.10 OR 4.56
ORIGINAL: chefred112
...get up an go is right...one of the very few ( 5 that I know of...includes you and me helo) NA qc hemi's runnin sub 14 qtr's...
...get up an go is right...one of the very few ( 5 that I know of...includes you and me helo) NA qc hemi's runnin sub 14 qtr's...
Administrator
Joined: Jul 2007
Posts: 24,686
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From: South Georgia/East Florida
RE: 4.10 OR 4.56
I don't pull a heavy load at all, before I sold my 19' bass boat, it was the heaviest thing I pulled and it was about 2500lbs., boat, motor & trailer. But the gears made it feel like nothing was there, and I got about a 5mpg dropoff with the stock 3.92's. There was no real difference in towing that boat with the 4.56's, maybe 1mpg.
Without towing the 4.56's actually give me about 2mpg BETTER around town with my 35" tires! Moderate (2 lane) hiway mileage at 45-55 mph is about the same and on Interstates I have about a 1mpg loss up to about 70mph, then it will decline after that to about 2mpg cruising at 80.
The power pulling hills and easing the load on the tranny is well worth the 1-2mpg trade off and I think you may actually see a gain pulling a load with 4.56's over your stock gears.
MAKE THE JUMP TO 4.56'S -- DON'T FEAR THE GEAR!
Besides your "butt dyno" will love them!!!
Without towing the 4.56's actually give me about 2mpg BETTER around town with my 35" tires! Moderate (2 lane) hiway mileage at 45-55 mph is about the same and on Interstates I have about a 1mpg loss up to about 70mph, then it will decline after that to about 2mpg cruising at 80.
The power pulling hills and easing the load on the tranny is well worth the 1-2mpg trade off and I think you may actually see a gain pulling a load with 4.56's over your stock gears.
MAKE THE JUMP TO 4.56'S -- DON'T FEAR THE GEAR!
Besides your "butt dyno" will love them!!!
Professional
Joined: Jul 2007
Posts: 199
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From: WI
RE: 4.10 OR 4.56
Had 2 questions for you... was wondering what the short belt mod was that you did, not to sure what that is. The other was did you have to change the carrier in the front of your truck when you put in the 4.56's?
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Joined: Aug 2005
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From:
RE: 4.10 OR 4.56
ORIGINAL: ccgRAMrod
Had 2 questions for you... was wondering what the short belt mod was that you did, not to sure what that is. The other was did you have to change the carrier in the front of your truck when you put in the 4.56's?
Had 2 questions for you... was wondering what the short belt mod was that you did, not to sure what that is. The other was did you have to change the carrier in the front of your truck when you put in the 4.56's?
Administrator
Joined: Jul 2007
Posts: 24,686
Likes: 21
From: South Georgia/East Florida
RE: 4.10 OR 4.56
3rd Gen 1500's have chrysler (AAM) 8" front, does not require carrier change for 4.56's...
Just remember to order Chrysler 12 bolt 9.25" for the back & 8" for the front...
Just remember to order Chrysler 12 bolt 9.25" for the back & 8" for the front...
Thread Starter
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Amateur
Joined: Aug 2007
Posts: 44
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From: Abita Springs, La
RE: 4.10 OR 4.56
just ordered my gears today from krc parts 290.00. now as far as install i work in service at a chrysler dealership as an advisor so my techs will do the labor for nothing. also ordered 212x cams fro krc to install. looking for great performance.