ok i have 3.42 now and i want higher gears, i was thinking 4.10 but will my MPG and highway driving suck? or should i go with something like 3.73. i have 275/45/20 tires.

 

i was also wondering this too as im in the same scenario

 

You won't hardly notice any difference until you put in a stall, then thats when it goes down. I'd personally go with the new Motive 4.30's.

 

Even with the 4.56:1, @ 70mph in od, you will only be turning 2800 rpm according to the online TCI calc. Go with the 4.30's. If I didn't have a Z71, I would put the 4.30's in.

James

 

Not to be a dick but actually 4.10's is a lower grear then 3.42's. As said it won't be that much of a change in rpm between the 2, some but not alot.. Mpg might get better driving in town because 4.10's will help the lil 4.8.

John

 

if your going to spray i wouldnt go with too low of a gear, nothing lower than 4:10's at least. JMO

 

wouldn't 4.30 be to much

 

4.30's would be an excellent choice, the closer you can get the rpms to peak hp ant the finish line the better off you are. 4.56's are a bit too low for spraying and 4.10's would be perfect for spraying. 4.30's for most vehicles would be the best performing option IMO. Unless your trapping 125 mph or more, I think the 4.30s are good.

 

it also depends on tire height

 

i wasn't planing on spraying