Sanster

i got a 07 WT with a 4.8 with 3:23 gears in it right now with 245/70R17 tires. I'm looking to beef up the rear end with a new diff cover gears and a good limited slip in it. I drive it everyday and i want to keep some kind of mileage in mind. Was wondering if i could get some imput on this since i've been looking around and can't really find anything to suit my needs.

cam

iTrader: (9)

OEM gears are good. Eaton posi is good. Diff cover use whatever they're all pretty much the same. ebay has all those parts cheap as ballz

Egghaus

Get a nice TA Performance cast aluminum diff cover. Extra fluid capacity and better cooling.

dlt76028

iTrader: (13)

tru trac is the best for daily driving, what size gears do you want? you sticking with that size tire?

BARBER

I got a True Trac and 4.56 G2 gears waiting to go in my 08. True Trac I got from Randy's on here. A friend is running G2s in his truck and they are quiet and set up very well.

Sanster

I've decide im going to go with a prerunner look/performance i'm really looking to leave the engine to just bolt's and gearing it to run 31 inch tall tires and occasionally a 28 to 31 inch tall paddle tire so i want a gear thats gonna run good on the street and enough to get me around off road occasionally.

ig109

I have the same truck with 3.73 gears and stock locker and love it..

If i had it to do over and had planned to get an aftermarket tune right off the bat i would do 3.90.. much more than that and i wouldnt think you would truely want to drive it all the time..

Sanster

hey thanks for the help^^ i was kind of half decide on 3:73's or 4:10's i figured 4:10's would be to much and 3:73's wouldn't be enough but the 3:90 sounds about right. Do you know anywhere online that i could get a set of gears i've looked around here for a few but never really can find a decent sight.

06Sierra2

I think 4.10s are perfect in with a heavy 4.8 4x4. you can make up for that loss of low end torque in a 4.8. 3.90s would still be a good improvement coming from 3.23s though. I had the same concerns when i did my gear swap but in a heavy truck the 4.10s are awesome. The tru trac works great and my next mod for the rear will be the TA cover as well.

NKPPhil

I haven't driven a 4.8 for several years, but while shopping for my new truck a couple months ago I test drove a 5.3 with 3.08 back-to-back with a 5.3 with 3.42 - and the difference was amazing. So, yeah, I'd have to say that either 3.90 or 4.10 will make a HUGE difference for you.

Enjoy!