So i have been reading around and i came across a thread pretty much bagging my gearing ratio 3.55 i have a 5.9L magnum so thats the stock gear ratio, but i was wondering what you have to do to change it to a better ratio and what ratio would be the best and what the cost on that might be?

 

The search feature is your friend.

What size tires are you running? if you are still rocking the 17" rims, then you might look at something like a 4.10 You can go 4.56, but I think it works better with a larger tire set up.
Also, if you do a lot of highway driving, you might want to dismiss the whole idea all together, unless you don't mind buying more gas. (Its not a major drop, but these days any drop in mileage hurts)


Welcome to the forums, and you might want to create a signature that tells what your truck is.

 

i can never find what im looking for in the search feature ha im new so getting used to every thing and yes i still have the stock rims and i have 32" tires

 

Id say 4.10 then. The bad thing is, and this is why I never changed mine. 1. 4x4 means you gotta change the front too 2. I drive mainly highway, and losing 1-2 MPG is out of the question. Each to their own, but be thankful that you don't have the 3.23(Might be 2 IDK) gearing that I have.

Also, the basic search feature is worth less in my opinion, I use the advanced portion where you can set parameters on your search and find better results.

 

yea, thanks for the help, do you know around how much this would cost, or even better do you know how do it?

 

hmm, When I rebuilt mine, It was about $300. Changing everything out to a higher ratio I think is around $500-$600 DIY. That might be a bit high, and I would do a little research to back that up, but my connection is running way toooooo slowwww. I guess I need to go yell at the isp for a minute
Hopefully the other guys that have done a conversion recently will chime in.

 

alright thanks a lot you really helped a lot

 

There isnt really anything wrong with having 3.55 gears and stock size tires, its when you install larger tires that it starts too suck. Does the gearing bother you?

Typically, for everyday driving, it would be fair to say to upgrade to 3.92 - 4.10 gears for up to 33" tires, and 4.56 gears for 35" tires.

 

well it just seems like my truck is alot slower than what it should be and from what I'm getting changing the gearing helps with that idk I don't really know much about this

 

How long have you owned the truck?
There are a few power robbing issues that happen on these trucks.
1. Plenum Gasket tear- will allow for oil to pool in the intake, possible misfires, and poor gas mileage.
2. In 2005, I believe, Chrysler issued a recall on all 2nd gen trucks for their Catalytic converters. More less, they said in a very nice way, that the cats they used for these trucks were junk.
3. If your truck has been into a dealership, more than likely, the PCM on your truck got reflashed. This retarded the timing, killing what power these trucks came with stock. Chrysler's reasoning??- reduce the power, kill gas mileage, and you lessen the probobality that the plenum gasket will tear.