hey all. well i have an 04 4.7 4x4 and i have the 3.55 gears. i need to upgrade to either 4.10 or more and i need to know what is the model of my axle so when i order the gears online they have 2 models. can anyone help me figure out how to get the model of my axles? and which gears is better? i dont tow much but i go off roading alot and ineed more power.
Cheers,

 

Chrysler 9.25", 12 bolt rear
Chrysler 8", 10 bolt IFS front


4.10's for stock size tires up to 33"
4.56 for tires over 33"
IMO

 

PM me the last 8 digits of your VIN and I can tell you what you have.....

 

can you do the gears yourself or is it better to just bring it to a shop. i heard you need a tool to get it right because if theyre too loose its bad and if theyre too tight theyre gonna eat each other up.

 

Thanx Hammerz. which brand do you recommend? i am looking for something good with low prices.

 

i will be taking it to the dealer coz i dont want any problems. i will just pay for it and relax. i think its complicated

 

Your truck came from the factory with a corporate 9.25 light duty rear axle with a 3.55 gear ratio.

 

should i go for the 4.56 so i get more power or shall i stick with the 4.10? will that mod affect the speedo? oh and im already having soon the 33' tires. and how will all that affect the fuel economy?

 

I went with 4.56's and couldnt be happier, but I have 37in tires.

The bigger tires will throwyour speed off, not the gears. I have a tuner and had already programmed it for the 37in tires, I didnt have to do a thing when I swapped gears.

 

so you mean that 33' tires on 4.56 will give the same power on 4.10? or what?