im not familair with rear end gears.......i have the camaro listed below w/ 2.73's.....my dads dodge dakota quad cab has the new 235hp 4.7L magnum with 3.92 gears.....the truck gets consistant 19mpg with moderate to hard driving(this truck gets up and goes) i want my camaro to have a similar effect but with gas reaching almost 2 bucks here in fl. i dont want 4.11's that will suck up gas......what gears would you guys recommend for this? who should i buy the gears from?

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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS

 

3:73s

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ICON Motorsports

1st & 3rd
MM Black Diamond 538 F&AM

 

3;42

 

You can't compare two completely different vehicle's and examine one individual part and get any useful data. Gears affect mileage, but not as much as alot of people think. The key part about mileage is efficiency. In some cases mileage can increase with a deeper gear, if the engine runs more efficient at a higher rpm. I like the 3.73's I installed, but both 3.42's and 3.73's will make a huge difference from 2.73's.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

would you guys recommend buying a fourth gen rear with 3.42's and a posi and swap it in or just go to slp and get a take off posi and 3.73's and pay somebody to put those in? only thing i dont like about the fourth gen. rear is that it adds 2 inches on either side....will my stock tires come way out of the wheel wells?

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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS

 

i had pretty much the same setup as you. i went with slp's t/o posi, w/ GM Motive 3.73 gears. huge difference. the total for parts and installation was $750. gas is already up around $2.10 for me, i only lost 1-2 mpg after switching from 2.73, but i do a lot of city driving, so overdrive was being used a lot more.

as for the dakota, you really can't compare the gear ratios. not only because of the truck's effeciency, but also because the transmission gears effect what RPM you cruise at, also. our fourth gear is .7:1. you can use the calculators on this site to see how much you're RPM will change.

Pat

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'92 Firebird 305 TBI
3.73 Posi
ASCD Ram Air Hood
14X3 K&N
'00 WS6 Exhaust
'00 16x8 Wheels

http://www.geocities.com/birdv8