NJFBOA - Home of New Jersey's Camaros and Firebirds

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NJFBOA - Home of New Jersey's Camaros and Firebirds (http://www.njfboa.org/forums/index.php)

- Transmission and Driveline (http://www.njfboa.org/forums/forumdisplay.php?f=38)

- - How much of a difference (http://www.njfboa.org/forums/showthread.php?t=29435)

Blacdout96

12-11-2007 08:17 PM

so what a re you cruising at in a 4L60E with 4:10's at 60 mph and 80 mph?

Tru2Chevy

12-11-2007 08:41 PM

Quote:

Originally Posted by Blacdout96 (Post 402878)

so what a re you cruising at in a 4L60E with 4:10's at 60 mph and 80 mph?

With a 25.6" tall tire in 4th gear 60 mph is ~ 2300 RPM and 80 mph is ~ 3,000 RPM

- Justin

Blacdout96

12-11-2007 09:17 PM

eek, hm, maybe 3:73's would be better for me. I love to drive aroudn town, but I do go to CT, and I race up n North Jersey so talk abotu wasting alot of gas.

Tru2Chevy

12-11-2007 10:25 PM

Quote:

Originally Posted by Blacdout96 (Post 402897)

eek, hm, maybe 3:73's would be better for me. I love to drive aroudn town, but I do go to CT, and I race up n North Jersey so talk abotu wasting alot of gas.

With 3.73s and a 25.6" tire 60 mph ~2100 and 80mph ~2750

http://www.f-body.org/gears/

- Justin

WildBillyT

12-12-2007 08:22 AM

Quote:

Originally Posted by Blacdout96 (Post 402897)

eek, hm, maybe 3:73's would be better for me. I love to drive aroudn town, but I do go to CT, and I race up n North Jersey so talk abotu wasting alot of gas.

Yeah, your 4th gear is .7:1, a T56's sixth gear (excluding 1993) is .5:1.

NightRydaSS

12-12-2007 11:13 AM

Quote:

Originally Posted by Tru2Chevy (Post 402823)

No, the OP has a 2.73 posi rear (2 series), NightRyda has a stock 3.42 posi (3 series). There are two people asking for gear recomendations in this thread.

As for my recomendations it would be 3.73s for the OP, and 4.10s for NightRyda

NightRyda - with 4.10s and an M6 80 mph in 6th gear is only ~2150 RPM.

- Justin

:shock: thats it?? that is only 250rpms higher then it is now...maybe ill do 4.10's. What diff should i get, eaton?

...6 gears FTW! :w00t:

bad64chevelle

12-22-2007 10:22 AM

The difference between 3:23s to 3:73s when I had my 94 Z (A4) were actually pretty good. The SOTP meter definitely noticed a difference. Probably the best modification to the car I did. The thing was only bolt ons with a tune btw. The car got sideways alot more :lol:

NJSPEEDER

12-24-2007 11:23 PM

Quote:

Originally Posted by Blacdout96 (Post 402897)

eek, hm, maybe 3:73's would be better for me. I love to drive aroudn town, but I do go to CT, and I race up n North Jersey so talk abotu wasting alot of gas.

the few hundred rpm difference doesn't mess with your mileage really. maybe you will lose fractional MPG.
the performance difference is there between the 3.73's and the 4.10's. the extra smiles for the same investment wil more than offset the few extra bucks you may spend on fuel over the course of a year.
besides, when you reset the computer to deal with the gears you can make adjustments to the program to add power and economy at the same time. that will more than offset the gear change.

Blacdout96

12-24-2007 11:42 PM

so what your saying is.....4:10's are ok for a 3.8 A4? even with some of the long trips i do?

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