Jamesbond2509

iTrader: (1)

Of Course! I basically came back to say my opinion on the 4.10s is not worth the money! Over 5 years all the power adders made the 4.10s more redundant with time. Should have stayed with the 3.73s and used the extra cash elsewhere.

SmokinHot98

iTrader: (20)

but were they good NA? I'm making decent power, but down low sucks and the 4.10's are enticing

I won't be putting a blower on anytime soon, but I think they would help with towing too

1320 OTTER

Here is some hard data. I went from 3.73s to 4.10s. I picked up 1 tenth and 1 mph. Not worth the money. Go with 4.56s. The 4.10s feel more peppy on the street but facts are facts. 1 tenth quicker, 1 mph faster in the 1/4.

Oh yeah, my truck wheel hops now and I need to get a drive shaft becouse the driveshaft RPM is higher now at crusing speeds. At 100 mph I can feel it vibrating now. With the 3.73s that did not happen untill 115 mph. So to go along with your gears get some Caltracks and a for real driveshaft.

06Sierra2

otter, without spinning and wheel hop im willing to be u gained more than a tenth. get the bugs worked out and ill bet you will be happy. i gained like 3 tenths with my gears but i was coming from 3.23s.

Wilde Racing

iTrader: (26)

After I started getting faster, I wanted to gear change. I was more than out of gear at the track, I even had a set of 3.73 gears for the front of the truck before I sold it all.... Well I still have the 3.73 gear front diff....

SmokinHot98

iTrader: (20)

I've been torn between 4.10's and 4.30's. My summer/winter combo are 32" tall, but my track tire is 28". I already knew that caltracs were a must

Jamesbond2509

iTrader: (1)

Given that you have the same cam and an 80E, I think 4.11s would heip you get out of the hole much better in NA. You will have to decide if the money is worth spending vs going to forced induction at which time the 3.73s would do just fine. You do start to run out of gear at the very top end and since going back to 3.73s, Im much happier with the highway performance.

Good Luck

Jamesbond2509

iTrader: (1)

One other huge difference is the weight of your 20 inch rims. I spent an afternoon at the American Racing warehouse with a scale and found a 20 in rim that weighed 26lbs! Most were in the 35-38 range. This removed about 50lbs of rotating mass and you know the equation that the energy required is proportional to the square of the rotating mass. Just this alone accounts for at least 0.25 sec at the track.