4;56 gears

As far as I can tell the diff carrier and even the diff clutch plates are the same part number for both the 04 and 05. I don't know why they are trying to sell you a "powerlock carrier"? The part number you posted is also what I found for the 05 4.56 gears.

When I spoke with Devin @ Unitrax he yold me in order to install 4.56's, all we need is the ring&pinion and the install kit. He also said that if you want to install a lower gear than 4.56(4.88;5.13 etc), then you'll need a new carrier.

So the place you called gave you prices of $190 for gears and $130 for the installation kit. Pretty close in price to the 4.56 kit BOOMER found at Jegs from Richmond Gear. He posted part numbers as well.

I want to wait and see how it works out for him. In fact, I may wait until Spring now, as my truck won't be driven until the weather gets better.

gears

Hey Guys,my 2-cents the 4.56s,there is not much difference between 4.1o-4.56.
I think for the track,we should be running max out in 4 th gear,which is probably close to the 4.88s
gearheadbill

i guess ill wait and see also im supercharging mine so wich gear do you guys think would be best?

B.Exxon said:

i guess ill wait and see also im supercharging mine so wich gear do you guys think would be best?

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What's most important to you? 1/4 mile, street,smoke shows?

Actually all of the above probably what i'm hoping for is mid to low 12's and still be able to bury the speedometer......too much to ask?

B.Exxon said:

Actually all of the above probably what i'm hoping for is mid to low 12's and still be able to bury the speedometer......too much to ask?

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Assuming you will be staying with stock wheels/tires, then you will want 4.56 gears. You could get away with 4.88 for low 12's and the smoke show but maybe not bury the speedometer.

9 Seconds,

Do you think the 4.56 `s will make a big difference in accelleration on the street? My mechanic doesn`t think so and would take maybe 3-4 mpg off the highway mileage.

I just don`t know if it is a worthwile mod in addition to what I have done and with adding the VEC 2 this month.

gears

how the heck is a change from 410-to456 going to change your mileage by 3-4MPG,DON'T BUY IT, WE HAVE A 6 SPEED MAN
GEARHEADBILL

Someone with a 2005 RC, what are your MPG number on your window sticker? I can't see how they could be much lower than they already were. My only experience is going from 3.07 to 3.45 on my Viper. That was noticable. Plus, I think Dodge made the change in the '05s to take some stress off the clutch and/or trannies (I'm sure it wasn't purely better performance) which would be a plus also. I also agree with gearheadbill in his post farther up.

I think for the track,we should be running max out in 4 th gear

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Hey 05 RC guys! Can one of you measure your trucks driveshaft diameter. I believe they are sized different because they will be spinning at a higher rpm at 150 mph? Gracias.

9 seconds said:

what are your MPG number on your window sticker? .

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Window sticker say 9 City 15 Highway (2005 SRT-10)

I get about 10 city and 15 highway


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Those who plan on Supercharging, along with other Mods, need to keep that in mind when choosing the right gear ratio. If you go with a 4.88, you may hit the redline in 4th gear before the end of the 1/4 mile!! I would think that with a SC, trap speeds in the 1/4 should be in excess of 115mph? Add in headers/exhaust, VEC2, etc. and you may need the stock 4.11's to get through the 1/4 mile in 4th!


Can one of our Math Majors do some quick calculations as to what RPM we'll be turning in 4TH Gear at 100mph; 110mph; 120mph with 4.56's AND 4.88's???
(Hey GearHeadBill, wanna take your truck on a Banzai run up to these speeds and tell us what RPM's you're turning with the 5.13's?? )


I honestly don't know how 5th gear would work out on the strip??

Just thinking out loud again