What diff size to go with 6.0 4l80E?
 

Trying to determine what diff gears to put in. Now I have the old original 3.08 but I will be going to limited slip and not sure whether 3.73 or 4.10 would be better. At this time I have about a 28.5" tall tire but looking to go a little bigger to about a 31" tire in the future. Any opinions or what is every one else doing with this combo.

Thanks!

Re: What diff size to go with 6.0 4l80E?
 

I guess it depends on what you will be doing with your truck. You may want to give a little more info so that you receive a better answer.

Re: What diff size to go with 6.0 4l80E?
 

Those are both the "fan favorite" diff ratio's on these swaps. I like the road manners that the 3:73 offers up, since you can run ~70 at just over 2k (each truck is a little different of course).

The 4.10 is a little more popular for the M6 guys, but you can still totally run it if your truck spends more time at the track or isn't doing long stretches of 70+ highway. I'll tell you what though....with the overdrive trans, either option feels WORLDS better than the old 3spds.

Re: What diff size to go with 6.0 4l80E?
 

I dropped a 3.73 in my 02 Silverado, awesome combo....it let that little 4.8 run! My longhorn is a tick different animal....stick shift, 6 spd ROD behind the 5.3. On a 29" tire, 3.42 gears....I have all the gear that I need! She will cruise @ 105 mph, @ 3100-3150 on the tach ;) Once again, it depends on you useage....longhorn

Re: What diff size to go with 6.0 4l80E?
 

:devil:

Re: What diff size to go with 6.0 4l80E?
 

Well my 4:10 gears and 4L80E run at 2600RPM's at 80MPH! My truck runs the interstates all the time ever since I bught it back in 1986. I just did a round trip to my dad's 280 miles today.:chevy:

Re: What diff size to go with 6.0 4l80E?
 

My burb has a 6.0 with 4L80E and 3.73 gearing. Very happy with the combination.