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

Motive 3.90s

Thread Tools
 
Search this Thread
 
Old Feb 11, 2009 | 12:40 PM
  #1  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default Motive 3.90s

Looking to install this on my SS, anyone running this gear in a 10 bolt? like or dislike them? i have a 6 speed, just looking to have fun on the street, would i need to replace the stock posi unit? or will it hold up?
Reply
Old Feb 11, 2009 | 11:42 PM
  #2  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

wow no one lol?
Reply
Old Feb 12, 2009 | 09:23 AM
  #3  
TRANS-DAD's Avatar
Launching!
iTrader: (1)
 
Joined: Mar 2008
Posts: 281
Likes: 0
From: PASADENA,TX.
Default

I'M thinking of going 3.90's also , alot of people will say 4.10's and I agree w/that if
your on 28" DR's but on a 26" tall street tire IMO is too much!

Gonna watch your post for moor opinion's!
Reply
Old Feb 12, 2009 | 11:43 AM
  #4  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

Originally Posted by TRANS-DAD
I'M thinking of going 3.90's also , alot of people will say 4.10's and I agree w/that if
your on 28" DR's but on a 26" tall street tire IMO is too much!

Gonna watch your post for moor opinion's!
i seem to think that 3.90s wit a 26 inch tire, is good, i think 4.10s is too much though
Reply
Old Feb 12, 2009 | 11:53 AM
  #5  
FST SS's Avatar
TECH Regular
15 Year Member
 
Joined: Oct 2006
Posts: 404
Likes: 1
From: Harvester Mo.
Default

I have 3.90's w/m6 and they are just right for my stock motor. With 4.10's I would be shifting to 5th at the end of the 1/4 unless I changed my rev limiter and with stock motor don't want to do that.
Reply
Old Feb 12, 2009 | 12:19 PM
  #6  
WS6R6's Avatar
TECH Regular
iTrader: (1)
 
Joined: Jan 2008
Posts: 423
Likes: 0
From: Kansas
Default

Some like 3.73, some like 4.11. I say go with the perfect meduim and get 3.90's. That's what im running in a locker'd 9'' with an M6 and I love them!
Reply
Old Feb 12, 2009 | 12:32 PM
  #7  
BriancWS6's Avatar
10 Second Club
iTrader: (18)
 
Joined: Mar 2004
Posts: 3,910
Likes: 1
From: The Garage
Default

Originally Posted by FST SS
I have 3.90's w/m6 and they are just right for my stock motor. With 4.10's I would be shifting to 5th at the end of the 1/4 unless I changed my rev limiter and with stock motor don't want to do that.
What are you trapping in the 1/4 with your stock engine? I trapped 113 with my car when it only had bolt-ons with 4.10s and it was fine. You can hit right at 115 with 4.10s, stock height tires, and the 6200 rev limit.

Don't fear the gear
Reply
Old Feb 12, 2009 | 12:38 PM
  #8  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

Originally Posted by FST SS
I have 3.90's w/m6 and they are just right for my stock motor. With 4.10's I would be shifting to 5th at the end of the 1/4 unless I changed my rev limiter and with stock motor don't want to do that.
Originally Posted by WS6R6
Some like 3.73, some like 4.11. I say go with the perfect meduim and get 3.90's. That's what im running in a locker'd 9'' with an M6 and I love them!
Originally Posted by BriancWS6
What are you trapping in the 1/4 with your stock engine? I trapped 113 with my car when it only had bolt-ons with 4.10s and it was fine. You can hit right at 115 with 4.10s, stock height tires, and the 6200 rev limit.

Don't fear the gear
ok cool, i have the stock 342s right now, do u notice a big difference in the jump? also wut is a good aftermarket carrier to go with? eaton? or truetrac?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Feb 12, 2009 | 12:51 PM
  #9  
BriancWS6's Avatar
10 Second Club
iTrader: (18)
 
Joined: Mar 2004
Posts: 3,910
Likes: 1
From: The Garage
Default

It's a noticeable difference when you swap from 3.42s to 4.10s. Makes 6th much more use-able as well.

Don't waste the money on an aftermarket differential. Just run the stocker til it dies while you save for a real rear (9in).
Reply
Old Feb 12, 2009 | 10:12 PM
  #10  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

Originally Posted by BriancWS6
It's a noticeable difference when you swap from 3.42s to 4.10s. Makes 6th much more use-able as well.

Don't waste the money on an aftermarket differential. Just run the stocker til it dies while you save for a real rear (9in).
yeah i hear ya, but i dont wanna do the job twice u kno, will the stocker hold up wit the new gears?
Reply
Old Feb 13, 2009 | 11:26 AM
  #11  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

cause i dont wanna have to change everything twice
Reply
Old Feb 14, 2009 | 02:29 AM
  #12  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

anyone know?
Reply
Old Feb 14, 2009 | 04:00 PM
  #13  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

true trac? eaton? or stocker?
Reply
Old Feb 14, 2009 | 07:59 PM
  #14  
JimsWS6's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Oct 2005
Posts: 324
Likes: 0
From: Norwich, NY
Default

just leave the stocker as stated. It'll be fine for sometime. Gears are usually the weak link. ANd I wouldn't go putting sticky tires, that'll just put an end to the 10 bolt that much faster.
Reply
Old Feb 14, 2009 | 08:21 PM
  #15  
gyrene2003's Avatar
12 Second Club
 
Joined: Jul 2005
Posts: 2,213
Likes: 1
From: Chesapeake va
Default

stop being vaginas, i have an A4 and i run motive 3.90s out back on a stock 10 bolt and if i had to do it again i would have gone with 4.10s!!! When it breaks im goin 4.30s!
Reply
Old Feb 15, 2009 | 02:06 AM
  #16  
Midnight00SS's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jul 2008
Posts: 1,483
Likes: 3
Default

Originally Posted by JimsWS6
just leave the stocker as stated. It'll be fine for sometime. Gears are usually the weak link. ANd I wouldn't go putting sticky tires, that'll just put an end to the 10 bolt that much faster.
Originally Posted by gyrene2003
stop being vaginas, i have an A4 and i run motive 3.90s out back on a stock 10 bolt and if i had to do it again i would have gone with 4.10s!!! When it breaks im goin 4.30s!
well as long as my motive gears will work with the stock carrier? i hope??? ive been down that road twice, some gears are only meant for the stock carrier, and then if the stock carrier blows u cant use those same gears on an aftermarket carrier.


gryene2003, do you have a stock carrier in yours??
Reply




All times are GMT -5. The time now is 12:28 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