I'm looking at buying a used ram and can find one with every option it seems but one so one of my questions was....
If I can find one with the 17s and I want the 20s would it be best to change the gears in order to have it be the same as oem? Would it be that simple or are there other differences? I'm wanting a qc and would also like the 4x4.

 

The 20's came with 3.92 gears to off set the larger rolling diameter and weight over the 17's.

 

Did the 20's come with LSD as well or was that an option?
Cheers.

 

so if I bought one with the 17s i should just change the gears out as well? Would the dealership or someone be able to change the computer or what?

 

The dealer can program your computer for whatever gears you install. I just put in 4.10's and had the dealer program it to correct my speedo. Cost me $68, which is their hourly rate, even tho it only took them about ten minutes of work.

 

thanks and do you know if like abarmby said the lsd was an option or what?

 

the AAM 1050 axel that comes on the ram 1500 does have a LSD option. but it is not the standard LSD we are used to that has clutch packs, it works off worm screws and sometimes takes some application of the brake pedal to lock in.

Ive done some high boost 3rd gear launches and left some nice black parallel lines, as well as leaving a nice BCOD behind me I would try 4th gear but I'm not sure the stock clutch could handle it

BCOD = Black Cloud Of Death. . .I love my Cummins[8D]

 

WHERE CAN I GET THE 3.92S

 

You don't need to have the pcm programmed for gear changes, just tire diameter changes.

The speedo is read off of the ring gear, so no matter what gears you have its still right on.

When you change tire diameter, you'll have to get he dealer to make the change to your pcm.