dirtydave289

i won't be doing much if any highway driving..but still..maybe 3.55s instead of 3.73s

quesey

heres a link to help you out

http://www.richmondgear.com/101032.html
but figure about 200 to 400 slipage depending on converter

my77stang

i wanna say 2500 was 55 in my II with a 15" wheel and 3.40's but i cant remember for sure - its been awhile since i've been able to drive it all around.

since 90% of any driving i will be doing is stuck in traffic going 45-55 i dont really mind but again if you go lower than 3.55's your going to hate any highway driving. i'd thought about 3.55's but i dont really know that it would be much of a difference from the 3.40's so it seems like money wasted.

anyone have firsthand seat-of-the-pants experience with gear changes that small?

dirtydave289

with 3.73s id be turning almost 5k at 55mph

quesey

LOL i'm guessing you used the wheel size?use the tire size measure tires most are like 26 27 or 28 in tall
like 3.70 gears @65mph with 27 in tires would be 2993+300 rpm slippage you lookin at 3400rpm
4.11 @65mph 27 in tire is 3325 rpm
i've run 3.70 in many cars its not that bad if everythings balanced good tires driveshaft mostly around 3500 runnin 65 70 it just dependson what YOU want good luck
john

Duntov

i swapped from a 2.87 to 3.54 on my car. gas mileage went from about 13 to 10.5. if you want your speedo to read correctly you will need a new speedo gear. I didn't switch gears and just drove based on tach. I did the math on old vs new rpm's at key speed points and knew how fast i was going based on that. a gear swap would be better.

itsa great mod

if you want, i can see if i can find my excel file that i put together to help me in deciding between 3.54 and 3.373

dirtydave289

Yeah man that'd be sweet, duntov

nice to see you have evaded the OTs hold on OTers

Quesey, yep i put 14 in the box lol

rmodel65

if he post anything it will be unlikely, hes just posting cause they are ragging on him in off topic for being a troll

dirtydave289

i saw that..and figured he went legit

but i suppose you could be right, and he's just bsing some posts

noroof66

3.55's work O.K on the highway for very short drives. With a C4, I'm just over 3k at 60. Gas mileage drops like a rock.