4.10 To 4.56 Rear Gear?

Discussion in 'Performance Mods' started by Big Daddy's SRT, Jan 12, 2018.

  1. Big Daddy's SRT

    Big Daddy's SRT Member

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    Is it worth it? I have a '04 and understand that it has the 4.10 rear ratio and that the '06 was given the 4.56? Just wondering if it's worth the time and money to change out the ring and pinion.
     
  2. earl lee

    earl lee Full Access Member

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  3. Big Daddy's SRT

    Big Daddy's SRT Member

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    Thanks earl. Read the thread very interesting. Sounds like the 56's might be the best all around ticket. Cost's shouldn't be that bad since only the ring, pinion, gear oil needs to be purchased. In your opinion what gear lube and weight would you go with?
     
  4. Psycho1122

    Psycho1122 Full Access Member

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    Just the torque multiplication factor would be reason enough to do the swap. The Dodge engineers quickly corrected this issue going from 04' to 05'.

    2004: 1st Gear thrust in Ft. Lbs. (525 X 2.66 X 4.10 = 5,725.65)
    2nd Gear thrust in Ft. Lbs. (525 X 1.78 X 4.10 = 3,831.45)
    3rd Gear thrust (Gear of choice) (525 X 1.30 X 4.10 = 2,798.25)

    2005: 1st Gear thrust in Ft. Lbs. (525 X 2.66 X 4.56 = 6,368.04) +642.39
    2nd Gear thrust in Ft. Lbs. (525 X 1.78 X 4.56 = 4,261.32) +429.87
    3rd Gear thrust (Gear of choice) (525 X 1.30 X 4.56 = 3,112.2)+313.95

    This considerable increase in torque multiplication is why drivers say the truck feels "lighter". Better 0-60 times is the result.

    The reason I say 3rd is "gear of choice" is this is the gear that the truck will put the smack down on most vehicles. The engines WIDE torque curve catapults this truck to high velocity, 4th is not bad either until you reach terminal velocity and our aero begins to become a disadvantage. This is right were I personally have punished my Buddies 392 Charger, plenty of C6 LS2 vetts, an Audi S8 sedan, Pontiac G8 and a few assorted sport bikes. LOL.

    I would go with the no brainer for axle lubricant... Mopar 75W90 Full synthetic gear oil with Mopar limited slip additive.

    Cheers!
     
  5. NukeGM/Ford

    NukeGM/Ford Active Member

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    Somewhere here is a post concerning rear gears for strip differences based on available tires.
    Shows best strip tire for track depending on rear gear.
     
  6. Big Daddy's SRT

    Big Daddy's SRT Member

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    Good information there Psycho. Thanks. Will truck throw a code after change is made? Will I need a tuner?
     
  7. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    No code, no tuner needed. Sensor is atop ring gear and reads from there. My opinion from working on and driving hundreds of these beasts is leave it alone and spend your money on go fast goodies instead. 4.10 was chosen to break the Guinness record. 4.56 geared truck would run out of gear to try and hit 154 stock. Fact is the two fastest, NA trucks are both 11.7 trucks and one with 4.10, the other with 4.56!:rock:
     
  8. ViperPete

    ViperPete Full Access Member

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    Love the gear in mine.
     
  9. Big Daddy's SRT

    Big Daddy's SRT Member

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    Which gear do you have ViperPete?
     
  10. Trainman

    Trainman Active Member Supporting Member

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    I recommend the 4.56 , much better around town and at the 1/4 mile.
     
  11. ViperPete

    ViperPete Full Access Member

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    4.56

    Just seems perfect for a heavy truck.
     
  12. Big Daddy's SRT

    Big Daddy's SRT Member

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    Thanks ViperPete. Hard to get use to that sluggish feel when going into 6th. I've got a hot rod Challenger with the 5 speed auto running 3.73's and you sure never feel sluggish with that setup.
     
  13. rbabody

    rbabody Full Access Member

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    Ya I want gears as well for my 04 . But on that note when I had my 05 with 456s I even wanted more gear. But I do like the nice highway driving with the 410s . Nothing like doing 80 mph and not even breaking a sweat and my fuel milage doubles.
     
  14. trussman

    trussman Active Member

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    Where's Caveman when you need him to bump the last 576 threads about gears :D
     
  15. Big Daddy's SRT

    Big Daddy's SRT Member

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    Yeah rbabody know what you mean about the highway driving at 80 and the tach is in the teens, kinda' blows what mind I have left! I guess I'm looking for a happy middle ground here.
     
  16. JTS VENOM PERFORMANCE

    JTS VENOM PERFORMANCE New Member Preferred Vendor

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    if you want a little extra 4.56 , but understand , unless your unit is brand new, swapping gears should consist of changing all the bearings out, normally depending on the area it runs from $500-$1000 for a gear change unless you can do it yourself, gears are quirky, and be sure to do your homework and get an experienced installer, one little bit off and you will get a whine or roar.
     
  17. Big Daddy's SRT

    Big Daddy's SRT Member

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    Thanks JTS. Good points.
     
  18. TXThumper

    TXThumper New Member Supporting Member

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    I changed out my 4:10's for 4:56 gears when I had my transmission rebuilt. I like the 4:56 gears much better for driving around town. I don't regret the change at all.
     
  19. Big Daddy's SRT

    Big Daddy's SRT Member

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    I may do this as a February project (maybe make winter go faster). Who would you all suggest to get the ring/pinion/install kit/lube from? I know that Auburn Gear has a big following and of course Mopar would be my first choice. Give me something to hang my hat on as to where to buy. JTS do you offer this gear change ratio? Thanks in advance!
     
  20. rbabody

    rbabody Full Access Member

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    Randys ring and pinion has always been good I have used them alot for other projects.