Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

GEAR SELECTION PLEASE HELP ME

Thread Tools
 
Search this Thread
 
Old Apr 8, 2002 | 03:04 PM
  #1  
68LS1eqpt's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2002
Posts: 75
Likes: 0
Default GEAR SELECTION PLEASE HELP ME

Just picked up the 9inch and im wondering if i should go with a 4.10 or a 4.30

Ive got stock heads/cam
ls1edit
th400 with stock gears
and both 26inch and 28inch tires
one for motor one for spray

let me know if the 4.30 will be too much

thanks
Reply
Old Apr 8, 2002 | 04:43 PM
  #2  
MIGHTYMOUSE's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Liked
iTrader: (59)
 
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
Default Re: GEAR SELECTION PLEASE HELP ME

i'd think thats good till around 125 trap speed with stock rev-limit and 26" tires.. im sure someone will fine tune that figure.
Reply
Old Apr 8, 2002 | 08:33 PM
  #3  
Ragtop 99's Avatar
TECH Senior Member
iTrader: (7)
 
Joined: Nov 2001
Posts: 9,491
Likes: 1
From: Bethesda, MD
Default Re: GEAR SELECTION PLEASE HELP ME

I estimate about 115 mph assuming 4.30s, 6200 rpm rev limiter, 3% converter slip, 28" tires with no growth on the big end. With a lock up switch, figure about 120 mph.
Reply
Old Apr 8, 2002 | 11:50 PM
  #4  
68LS1eqpt's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2002
Posts: 75
Likes: 0
Default Re: GEAR SELECTION PLEASE HELP ME

should i go with the 4.30 or no, ive got a decent size converter with no lock up
Reply
Old Apr 9, 2002 | 08:09 AM
  #5  
Ragtop 99's Avatar
TECH Senior Member
iTrader: (7)
 
Joined: Nov 2001
Posts: 9,491
Likes: 1
From: Bethesda, MD
Default Re: GEAR SELECTION PLEASE HELP ME

If you're are going to spray a big shot, 150 or more and want to stay within the stock rev limiter, I would do 4.10s. ET wise, 4.30s vs 4.10s won't give you much, and 4.10s will give you more flexibility in the mph catagory.

If you are willing to swap out your springs and pushrods and spin to 6600, then 4.30s would be ok.
Reply
Old Apr 9, 2002 | 11:01 AM
  #6  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,329
Likes: 1,767
From: Chicago, IL
Default Re: GEAR SELECTION PLEASE HELP ME

I have a similar problem.

I am running 26's and 4.10's, and have been going thru the traps around 6400 (unlocked).

For spray, I need true 28's but I think I am limited to about 140mph at 7000 rpms.

If you plan to spray big, say 150 plus, I would not go nuts with gear.
Reply
Old Apr 9, 2002 | 05:00 PM
  #7  
68LS1eqpt's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2002
Posts: 75
Likes: 0
Default Re: GEAR SELECTION PLEASE HELP ME

ive got a 60ft monster and im not that good on the big end. I will spray a lot and shift around 63-64 with stock springs. When i spray ill be on a 28inch tire. I think ill go with the 4.30
Reply




All times are GMT -5. The time now is 05:06 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE