Do not let anyone tell you your rear end is junk! Our trucks have limited slip...that is a safer version of positive traction. Lockers are very dangerous to have when driving around corners as they will tend to go in a straight direction. To me...I wouldn't want lockers on my truck or on a street vehicle especially if my wife or child were to drive it. I would imagine that you could beef your carrier up....maybe with some spring loaded spider gears if they don't have them now. But I wouldn't want lockers unless I could unlock them for safety reasons. They are only good for all out racing and four wheeling...they are not good for street driving. I'm happy with mine! edit: I stand corrected on this...we do not all have limited slip, sry

 

really annoys me, why does the open suck? can someone please provide real data as to how much better the 3.92 lsd is better rather than just their opinion? The 3.55 is now rated to haul over 8k, the 3.92 adds another 1k. The change from 3.21 to 3.92 is huge, 3.55 to 3.92 is not that huge. I actually called a shop and they told me that change would be a waste of my money and i dont need anything more than what I have for pulling my trailers 6k and the driving i do.

So yes if you have it the 3.92 lsd is better but I dont think the 3.55 open is all that bad.

Yeah maybe I am also a bit jealous but i will take my 2009 3.55 with a lifetime warranty verse a 2010 w/lsd anyday. The truck has plenty of power to tow with the 3.55.

 

I agree with the shop...there's not enough performance difference there between the two to be concerned. Even with 3.23's you could tow just fine with the tow haul mode so it's pointless...3.55 is a good gear to have! EDIT: Besides...anyone frequently towing something weighing too much more than their truck weighs is looking for trouble in the long run. That goes for both parts wear and safety on the highway. I don't care what any 1500 truck is capable of...the truck weight to trailer weight ratio when there's wet or slippery conditions is my biggest concern. I have a RCSB with 3.92's and I will never attempt to pull anything that my 5500 lb trailer couldn't carry. Now I have put 7,000 lbs (gravel) in it and it trailered well without bottoming out. But I could feel the strain on my truck and I didn't like it, but it had nothing to do with the gears...it was the weight of the trailer against the weight of my truck I could feel.

 

if you have the 3.55 rear end like the guy asked then you have an open diff...not a lsd unit. in the 3.55 you rely on the traction control in the truck to use the brakes to keep one wheel from spinning instead of clutches in the diff like the 3.92 has...the 3.55 is fine for most people but I will be installing an aftermarket limited slip for my truck which has the 3.55 since it is junk for farm use.

 

The 3.55 is a very nice gear, but it's all about personal taste and how you want the butt dyno to feel. Is LSD required? No, most people will never miss it unless they're trying to lay down some rubber and Hoon it up. Changing your gears for an increase in MPG is just silly, you'll never see enough results to justify the costs, especially if you've got a 4x4 truck and have to do both front and rear. I paid $1300 to change from 3.55s in my 2009 4x2 Sport to 4.10 and a Limit Slip Diff. Was it worth that much for the change in off the line power? To me yes, but to some it won't be that much of a difference to justify that much of a cost. Also, you open yourself up to a whole new series of headaches if things go wrong. Although the performance of my gears are great and I love the feel, they whine very, very loudly at highway speeds. 4 Wheel Parts in San Antonio isn't willing to help me. Instead taking the stance that the noise is normal for aftermarket gears in Dodge due to the gear's steeper cut. So I'm now shopping around for a set of OEM 4.10s, which the cheapest I can find is $900 and then it'll be at least $300 of labor on top of that. The real kicker is that after I'm going to spend $2500 or so on the rear end, if it blows up and takes something with it, Dodge isn't going to honor the power train warranty. Sure, 4 Wheel Parts will fix the rear end, but I'd be SOL for anything else that get's damaged. So, with that all said, do I think it's worth it now? HECK NO!!! If you've got 3.55s, then be happy and move on. Go check out a Superchips tuner, or take your money and upgrade your stereo. You'll save yourself a ton of headache.

 

thanks for all the reply i am appy with my truck (3,55) but for about 500$ for 3,92 and LSD in canada i will take it anytime.500$on a 40 000+ truck is about nothing.my truck is almost full,and i think that my saleman skip the 3,92 LSD because he can get the truck very fast from another dealer, to bad for him he sale me 3 truck and 2 wife cars in the last 6 years. i dont think i will buy another one from him.by the way last week went to the same dealer and look at the 9 truck they got=all 3,92.thank

 

Sorry...I stand corrected, I was under the impression that we all had the LSD! But it should tell him on his build sheet /window sticker sticker, should it not?

 

The 3.55 is deffinately an open diff. And from the limited off roading I have so far done with this truck, sorry, it sucks. I had a locker in my old street truck, no issues ever with drivability, and would not hesitate to put one in this truck. Off road, I hardly had to shift into 4x4 ever. With the open diff in this one, as soon as it gets a little off level, one tire is spinning and you are going no where fast. I need to be in 4x4 alot more.


I love the 3.55's, just hate the open dif. But then again, I use the truck and it will see bush duty. On the road, it really doesn't matter unless you need the 2 wheel peel, or you are in slippery conditions. But then, the traction control should handle slippery roads just fine.

 

i was under the same impression before i start to read in this forum.nex time i will built my truck on dodge web site and find or order one the way i want it.

 

This is truck the ESP on the truck is great even with one wheel peel it has to do with the ABS brakes keeps the wheels from spinning, sucks if your stuck you have to turn it off those times where you just need to spin the tires to get out, but I haven't had one of those for years, I wish I would have just gotten a 2wd but I am sure the 4wd with come in just when I need it like usual.