white06

I have to open this can of worms again, but what mileage are you guys getting with 4.10 that swapped from 3.23? I have 3.23 in my 06 and I get about 22mpg, just wondering what it would go to.

LesPaul

depends... highway or street

trever1t

iTrader: (14)

Right.
City driving would improve with less strain on the drivetrain too. Highway would use a little bit more fuel.
3.23's dont belong on a pick-up truck to begin with.
If you want performance you pay. Go with the 4.10's unless you plan on going FI in the future.

silver-mod-o

iTrader: (15)

my 4.10's get around 20 on the hwy still... you just have to keep your foot out of it and drive like a normal person, which is hard to do at times.

white06

I mean highway mileage. I get about 22mpg on the highway doing 80 or so. I gues If i went 70-75 with the 4.10s it'd be about the same huh?

Michael Matthews

iTrader: (3)

yeah prolly the same i got 18.2 avg when i got my 05 rcsb, and all the mods later im getting 17.1 avg it only dropped 0.2 when i got 4.10s and headers. and with the 323s i was 2k at 70 now wit the 410s im 2k at 60 and all my good punchs went down 10 mph to ha.

jonnyboy

iTrader: (3)

Whoa, how are you getting 22mpg?? I have an 06 ext. cab w/ 3.23's and since I drove it off the lot I've been getting 17 on the dot unless I'm pulling a trailer. I drive 120 miles a day on open road, and I normally don't have a heavy foot.

NBred94

I went from 3.23's to 4.10's in my crew cab (lifted w/ 33's). I probably averaged about 18 mpg with a mix of city/highway before the swap. I probably average 16-17 now driving the same way.

If you put any value on enjoying driving your truck, it will be worth the small marginal decrease in mileage.

xsports33

iTrader: (1)

Same here. I went from 19 mpg with 3.42 to 16 mpg with 4.56.

jgun

17 down to 15 / 373 to 410 gears