I'd say if you're paying to get work done in there, might as well throw in LSD. I simply couldn't live without one and can't imagine why any rear ends get shipped without one, especially on a 2wd. The extra traction is great and yeah I live where there's snow, mud, wet grass and whatever else and usually towing something through it. I keep a bit of weight in the back for the winter and it goes further than my old front wheel drive cars. Now I can always hook on to my jeep if I ever get stuck but luckily have never had to do that yet. I wouldn't really compare it to a 4x4 with open diff since that 1 front wheel will almost always help out more than a second rear but if you manage to cross something and raise 2 corners off the ground, you'll be glad to have the LSD. With any rig, you just have to know your limits.

 

I have a 2006 2wd Ram, it came stock with an open diff and 3.55 gearing. I upgraded to 3.92's and an Auburn LSD in 2007 after I got stuck with the "peg leg" in some sand when I was out fishing. The gearing and LSD were the best things I could have ever done. I can get through some pretty rough service roads with ease. I have never taken it in mud as Las Vegas doesn't get a whole lot but it does great in the desert. I want to lift it like 4 inches just to clear some 33 inch all terrains to help me get a little more traction/ground clearance. I ordered my gears, LSD, install kit and fluids at a great price from 3rdstrikeperformance.com. I just took the parts to a driveline/differential shop in town and they did all the labor. Just be careful if you do change out the gears, they have a pretty tedious break in period, but any reputable shop will fill you in on that.

 

I'm not sure what gear ratio I should be looking at. My truck was stock with 245/70/17 and I recently went with 285/70/17 which are about 32" (pretty worn bought second hand from buddy). Now after my 3" lift I want 35's do you think 3.92's would be a low enough gear ratio to run 35's without screwing up the transmission?

 

If your going to go up to 35's go ahead and go up to 4.56's when you have all the other work done.

 

With 35's and 4.1 gearing, your rpms would be about the same as your stock tires and 3.55 gearing. I think at the very least you would want that but 4.56 would be better IMO. That would jump you up to match rpms of the folks who have 3.92 gearing and stock tires. Most seem happy with that for power and mpg.

 

With 35's I would go with 4.56's or 4.10's. Really just a personal preference if you want easier low end movement or easier freeway rolling.

 

I know this message is really old and I hope you figured out long ago what you want to do. But a few years ago Yukon came out specially for guys like "us" the Yukon Gear YDGC9.25311. It's the only true rear locker that 2006 Dodge Ram 1500 2wd St models can install effectively and the product work perfectly. Check it out!

 

lmao what an idiot

 

A limited slip is much better for a daily driver. Never liked an open differential myself.

 

Says the guy who's first post is to respond to a six year old post in a ten year old thread calling someone else an idiot...... *shrug*