So i am thinking of upgrading to 4.56 gears.
Moes has both sets with install kits for $599
http://moesperformance.com/index.php...oducts_id=1163

But in the print in says you might need to Machine to get the gears to fit 06-07 Models
anyone ran into this know what all is involved.
Im planning on sepnding alot of time to do the install myself,(been reading alot) buying a few tools i will need to do it.
I know it will be alot of work and very time consuming, but i think after i tackle the rear it will be alot easier to do the front.
Also i seen somewhere that you might need to change the front carrier ? is this true ?

Thanks

 

doing them is a art ..if you mess up bad things can happin .. i have had 3:92's , 4:56's and now 4:10's ... i like the 4:10's because i have a heavy truck . the 4:56's on my old truck were awesome thow ...you will like

 

456s are nice but I certainly agree to let a shop or someone from a shop do it. Check the boards and fine some used ones if you can.

The carrier pin will have to be machined for the gear to work. This is from Motive Gears site.
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CHRYSLER

PROBLEM: CHRYSLER: 9.25", 12 Bolt Cover, 4.56 and Higher.

I bought 4.56 gears for my 1/2 ton pickup, but I cannot get the cross pin into my carrier.

SOLUTION: It does not matter whose gears you use. You will need to modify your cross pin to use a 4.56 or higher gear in your vehicle. This applies for open differential, Auburn and Eaton differentials. The pin will need to be cut at an angle opposite the bolt hole. Because every manufacturer is different, no measurement is provided.
*******************

 

you either have to run a notched cross pin or grind the gear here is the write up on them
http://www.ringpinion.com/TipOfTheDay.aspx?TipID=7

 

Thats not exactly how the pin gets shaved on ours but you have the right idea.

 

They had to grind a little bit between the teeth to fit my pin back in. They said I might here a whine for a thousand miles or so, but I never heard one.

 

Ok at least the machine work isnt something that needs to be done on a lathe..
That was what i was thinking when it said machine work.

 

It's good they are telling folks now. I found this out in 92 and no one had an answer for me so I shaved the pin. It seemed like the obvious choice at the time.

 

Im pretty sure they my guy notched my pin.

 

That's one thing I wont trust myslef doing is gears, I'll actually pay someone to do some work to my truck, I can't wait to get it done