Z'06

Considerations:

• 295/70/17 (~33") tires will remain
• 2WD Z71 package, so 4.30 gears could be an option
• Current gears = 3.23 = FAIL
• TR220-112 cam
• 3,000-3,200 stall converter
• JBA shorties
• Rarely drive over 80 on the highway; may take it to the track once it's geared correctly

Factory tires were 265/70/17 (~31") available with gear ratios all the way to 4.10. I am planning to replace the stock G80 with a Truetrac.

BLUES MAN

i say 4:56, but im partial. i figured i would rather be over geared than wonder what if...

andrew383

iTrader: (14)

The 295's are closer to 34" but anywho id go with 4.56 unless you plan on going with a smaller tire don the road..

08Chevy

iTrader: (2)

Since you drive on the highway I said 4:30s but get rid of those shortys brah. Get some long tubes.

05gmcsierra

iTrader: (3)

i say 4.56s.. i run 4.10 on a 31" tire.. im on the highway alot.. still get 18mpg @ 70 2400rpm..
4.10 would b ideal for 33" tires but u want that extra torque u need to go one step higher... u wont regret it.. look at everyone here running 4.10s on 28"s at the track and 30-31s on a regular basis...
4.56s!!!

20inch8lug

i say 4.56's i am runnin 4.10's with my lq4 and 33's sooin to be 35's and i wanna do 4.56's or 4.88's

Beatdown Z

iTrader: (18)

4.56's. That's what I have in my 4.8 work truck with 30" tires, and it runs great.

Rhino79

iTrader: (7)

4.56's, I dont think the 4.30s would put you at optimum gearing with that large of a tire

mhotrodscooter

iTrader: (13)

I like the 4:30's

Rhino79

iTrader: (7)

I really do too, especially if spray was ever coming...