I will be switching to 4.56 gears shortly. I have a 2003 4x4 ram with a hemi and 3.55 gears. I know I need front and rear ring and pinion gear sets. I'm also going to get master install kits for both. I also want a limited slip. Thinking auburn would be good. Is there anything else I may need? I am doing this mainly for towing. I'm thinking maybe a 1ton tranny cooler swould work. I'm assuming it would most likely drop right in. Anything else I'm overlooking??? If I'm overlooking anything please help! Thanks!

 

Just fluids...

 

A good shop that has done Ram gear changes before

 

Will 4:56 gear set fit in front diff ?

 

Yep...

 

What would it cost to do the switch?

 

Awesome

 

Depends on whose doing the work and what all you buy.

If you just buy the R&P, master install kit and do it yourself, alot cheaper than just dropping it off at a shop.

Also depends on if you go with an aftermarket locker, lsd, stock lsd, etc etc.

If you were doing it all yourself id say front and rear could be done under a grand with new parts and aftermarket lsd in the rear. (quick look seems to be $500-&700 for front and rear, plus ~300 give or take alil for aftermarket rear lsd = right under 1000 depending on brands and what you can get on sale)

Go to a shop, anywhere from 1200-2000. Really just depends on alot of factors and whose doing the work.

 

I have read before but don't quote me that the 3.55 diffs need to be trimmed out a little to fit the 4.56s

 

Ive also thought I read this as well but beens Hammer didn't mention it I just assumed I was wrong and didnt want to say anything lol.