i really like the 4.10 set up. 4.56 seems a bit steep for daily use.

 

It was around 500 for my gears + install. Went from 3.55's to 4.10's keeping the factory LSD. Brought the gears new on local CL (Yukon) and used another guy on CL to do the install. He was mobile and came to my place to install. 4 hours and he was done.

10k later and no whine except my wife when i get on it lol.

This is with 275/55/17's.

 

If this is to beat your buddy in a race (and I sincerely hope you are doing this at a track and not on public streets!) then it's 4.56 gears (about $600 for parts/labor per axle) and an Auburn LSD preferably the Pro Series (clutch LSDs react faster than gear ones so its gear driven for off-road, clutch for pavement & the Pro Series has a higher bias).

Also, lose the 20s and get you some 17s to shave weight.

And your buddy may still kick your a$$, because let's face it, recycled Coke cans weigh less than steel...

 

3.55 to 4.10 is exactly the gear change I intend to make. Not so that I can beat a Titan at the track, but for towing and improved driveability. I live in hilly country and I'm think I'd be much happier with gearing more closely matched to my circumstances.

I'm still up in the air as to whether to go with an Auburn or a Detroit Trutrac for my limited slip though. I'm more concerned with off-road traction with a trailer (not that I'm going to be doing a lot of wheeling, but maybe a little), rain traction, and the occasional snowfall.

 

I think 4.10s are the right gear for tires under 33" UNLESS you tow/haul a lot OR plan on taking it to the track.
I have the Auburn, but the performance series (not quite the bias, but more "streetable") there are three reasons I have this and not the DTT. 1) I had one on my '98 Dodge 4x4 and it performed well. 2) At the time I was doing mine, Detroit was in the process of being bought out be Eaton and the DTT for the Chrysler 9.25" rear was on back-order with NO estimation of ship date. 3) Documentation at the time (and it may still state it, dunno) said that the DTT WAS NOT recommended for tires over 33".

Now I do know a LOT of guys with tires over 33" and a DTT with NO problems, but 5 years ago when I did my gears and LSD, I didn't.

 

Went from 3:55 to DTT/4:10 running 30 1/2" tires. Wish I'd gone to 4:56. Mine is a street truck with a little towing on occassion.

 

I had the Auburn put in my Explorer back in 99 - it worked great. It was the "performance" version also, not the pro. I got pretty good traction out of it, and I had it for around 70K miles before I sold the vehicle. It never let me down. Not quite a locker, but it worked well.

Streetable is a good thing, since this will be on the pavement more than off.

Hammer & RedTruck - how do you like how your two LSDs hook up and handle? How are they in the rain? On the trail?

 

I can't speak to trails, but street wise the DTT operates flawlessly. Traction can be a problem if it is slick out, but Red doesn't carry a lot of wieght. Good luck...

 

man i wish i knew where you guys are getting your gears done. I have been quoted anywhere from 2500 to 5000. anyone know a shop in he upper northwest(US or Canada) that does good work?

 

Ive seen lunchbox locker you could throw in and keep stock gears for like 400