are you ever planning on going bigger tires?
if wanting 35's i would get a 4.56 or similar
if wanting to keep stock i would say 4.10 ish

 

i would go with 4.56, my buddy has them and they are great for towing. IN FACT ill be getting my 4.56 next paycheck .

 

well, I don't plan on going bigger, if I ever did it wouldn't be much, cuz I am building an off road toy, so won't be trying to make this truck much for off road. I do have 285/70/17 on i now, not sure what that equates to as far as ilike 33's or anything. I don't do a ton of towing, but prolly more than most...although that may change by moving to Alaska, as I won't have to tow all of my buddies and their Chevy's

Regardless of the ratio...is it a wise decision to just get the kit and rebuild this axle? Or should I look into a better axle...it just makes me skeptical that the dealer called it a "light duty" Chrysler 8.25 axle

 

my vote goes towards 4.10.
and keep that size tire

 

is there much price difference or MPG difference between the 4.10 and 4.56? Cuz if the MPG won't be much noticeable, I might as well go all out...as long as the cost isn't sky high. Also, wouldn't I need to change the front gears too? Wouldn't they burn up if I put it in 4x4 just to try to stay safer on the road...I know if the tires are slipping like in a mud bogger it's fine, and infact most have lower gears in front to help pull through mud...but on a road truck I thought it was a no no. And also brings me to another question. I have the 285/70 on but my spare is still a 245/70. If I got a flat would that tire harm my axle if one side i tryin to run 3.55 and the other like 3.20 or something that has the bigger tire?

 

ive debated on whether to go 4.11 or 4.56, but i have friend with a power wagon and 4.56 vs my 3.55. he logs 3 mpg more than i do in town, so im going to work towards 4.56 for the truck, and look forward to the better power transfer.

 

also yes you would have to change front and rear ring and pinion.

 

no cost difference in 4.56 to 4.10. you need to do the front and rear. pretty sure you have a 9.25" rear and an 8" front by the way. my recommendation is if you do more highway that city, go with 4.10. if you do more city than highway, go with 4.56.

 

My rule of thumb is 4.10s for tires smaller than 33" and 4.56 for 33s and over. Unless you tow a lot or go to the track.

If this is a one time tow and you never plan on larger tires then I'd go with 4.10s

 

i LOVE having 4.56s with my 33" tires. at 70mph on the fwy im only at about 2200 rpms. i was debating whether or not to go with 4.10 or 4.56 because i do drive alot of fwy. but i have found that when i stay at 70 or lower on the fwy, my mpgs stay the same as when i had 3.73s. now i only regret not going with 4.88.

yes, you will have to do both front and back axles. you should get a master install set and gears for both. also, if you have a stock LSD, you should seriously consider changing that out. there are known problems with it.