OUZBnd

Im doing a gear upgrade, i drive 50 miles a day at 70 mph. To any of you guys who have 4.10's, what rpms are you running at this speed? 3.73's, same Q.

did 4.10's hurt your milage much?

I cant wait to get these things order and put in. Thanks to Dan02GT and a couple other people im leaning toward 4.10's, but i'd love to get some others input. (mainly im concerned with the rpms at 70mph with 4.10's)

Thanks!

OUZBnd

I just called Jeg's and the tech guy said in his "profesional" opinion 4.10 gears wont do me any good with a stock motor, that only a motor with cam/crank upgrades at high rpms this will help. He said 3.73's will do me good. Sounds kinda shady to me, but what do you guys think?

Jugador

i think you need to do a search. if i had a nickel for every time this question was asked, i would have an assload of nickels.

1fakev8

Is it a stick or auto? What mods do you have, and are there any more mods to come after these gears? My personal opinion go with 3.73 if a stick and 4.10 if an auto. I'm not for sure on the rpm sittings but on my 94 lighting w/ 3.73 @ 70 it sit @ about 2 and half.

NOS/MAN

4.10s 80 mph@3000 rpms.. 3.73 92 mph@3000rpms..12 mph more ,,as far as gas milage you will loss about 4 miles per gal going from 3.73s to 4.10s,,i got 99 cobra i get 26 mpg @80mph.

Deleted User

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RJM02GTDrag

4.10 or higher for automatics or cars remaining NA, 3:73 if future plans include SC or N20.

NOS/MAN

WITH STREET TIRES ??? YOU WILL BLOW THEM OFF...

Deleted User

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NOS/MAN

I USED TO LOVE MY COBRA WITH 4.10S BUT SUCKED ON HIGHWAY...I WOULD THROW A ROD ON A 2000 MILES TRIP,,FOR SURE,,