4.10 gears

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Dec 31, 2011 | 11:06 AM

#21

kimmer

Le Mans Master

Joined: Jul 2009

Posts: 6,381

Likes: 66

From: SF bay area C.A.

C4 of the Year Finalist

I'm looking to move up with my a4, sounds like the 3:07's might be the way to go even though I was thinking bigger.

Dec 31, 2011 | 11:13 AM

#22

BSenzina

Racer

Joined: Oct 2010

Posts: 403

Likes: 5

From: West Palm Beach FL

is there a way to find out what my 84 has in it??? And what might it cost to change out???

Dec 31, 2011 | 11:29 AM

#23

kimmer

Le Mans Master

Joined: Jul 2009

Posts: 6,381

Likes: 66

From: SF bay area C.A.

C4 of the Year Finalist

should be stamped on the bottom of the case.

Dec 31, 2011 | 11:45 AM

#24

zr1fred

Race Director

Joined: May 2006

Posts: 10,691

Likes: 71

From: Phoenix Arizona

Quote:

Originally Posted by Alan777

If you currently have 2.59's, then yes, changing your gears is a damn good improvement. I ran 3.07's in my auto and loved them.

3.07's are a great street gear with the vette auto. Really makes it come alive, and they are pretty easy to find fairly cheap (lots of 84-5's getting parted out). One of the problems with going with the steeper gears is the L98's and LT1's max out at lower rpms, so unless you are having low end problems, or have modified the engines for higher RPMs, you aren't going to get much improvement going to deep.

Dec 31, 2011 | 03:05 PM

#25

BSenzina

Racer

Joined: Oct 2010

Posts: 403

Likes: 5

From: West Palm Beach FL

Thank you for the information.

Dec 31, 2011 | 04:42 PM

#26

DVNCI

Melting Slicks

Joined: Jun 1999

Posts: 2,949

Likes: 23

From: Bowling Green KY

Quote:

Originally Posted by jmgtp

I corrected my speedo via a pcm reflash when I went to 4.11s in the 94. I think that is the best/easiest way to get it to read correctly.

Jan 2, 2012 | 08:36 AM

#27

drmrman

Melting Slicks

Joined: Apr 2007

Posts: 2,547

Likes: 46

From: NJ

Quote:

Originally Posted by GREGGPENN

Hey...Even with a 383 and a big increase in TQ, I'm not excited about 6th gear.

Use it on level/downhill grades. Have more fun in 5th -- when necessary. Both are, after all, OD gears.

Agreed... 5th and 6th are a joke with the ZF... Ive gone on a couple closed course spirited runs and 5th gear feels like youve hit a wall. 1-4 is a pleasure!

Also 4:10's are a great combination for street use. But if you do plan to bring the car to the track anytime, they are a bit steep. You will be crossing the traps EITHER riding the limiter or shifting into 5th.

Jan 7, 2012 | 06:27 PM

#28

85vetteguy

Drifting

Joined: Jun 2001

Posts: 1,490

Likes: 17

From: Darlington, MD

I dont think you would be in 5th. With the stock 3:45 I crossed the trap in 3rd @ 110. You would probably be in 4th so it would be one more shift in the 1/4.

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Jan 7, 2012 | 06:39 PM

#29

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,264

Likes: 88

From: O'Fallon Missouri

I've crossed the stripe in fourth at 119 mph with my 4.10's, ~6500 rpms.

Jan 8, 2012 | 09:13 AM

#30

drmrman

Melting Slicks

Joined: Apr 2007

Posts: 2,547

Likes: 46

From: NJ

Quote:

Originally Posted by 85vetteguy

I dont think you would be in 5th. With the stock 3:45 I crossed the trap in 3rd @ 110. You would probably be in 4th so it would be one more shift in the 1/4.

Its not a probably. Its fact. The car has been to the track.

I crossed the traps IN 4th gear on the limiter almost every pass.

As for STL94LT1 the difference is almost 1000 RPMS in each gear. This allows further travel and more mph in each gear. My rev limiter is set to 5700 because it is a stock motor.

13.001 @ 110mph 2.01 60ft. Crossed the traps in 4th at 5700rpm's with 4:10 rear gears. Thats the break down.

Jan 8, 2012 | 09:24 AM

#31

onDjuice

Thread Starter

Instructor

Joined: Oct 2011

Posts: 135

Likes: 0

Hey (drmrman) thats some good trap speed. What mods have you done to the car..

Jan 8, 2012 | 09:33 AM

#32

drmrman

Melting Slicks

Joined: Apr 2007

Posts: 2,547

Likes: 46

From: NJ

Basically full boltons... Too many really to list, but the usual stuff. Intake, e water pump, 1.6 roller rockers, complete exhaust, and 4:10's are the biggest things.

Jan 8, 2012 | 02:31 PM

#33

Cavi

Pro

Joined: Oct 2011

Posts: 716

Likes: 0

Autocross it might not be good because you may ran out of Gear and have to shift depending on the type of track. My track is tight so i basically run the whole track in 2 nd gear. If i were to swap i would have to shift to 3 rd at the end of the straight then downshift. End result lost time