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

12 Bolt at an advantage?

Thread Tools
 
Search this Thread
 
Old 01-13-2006, 10:37 AM
  #1  
11 Second Club
Thread Starter
iTrader: (12)
 
TARZAN's Avatar
 
Join Date: Dec 2003
Location: Memphis Area
Posts: 1,312
Likes: 0
Received 0 Likes on 0 Posts

Default 12 Bolt at an advantage?

I've been considering a 9" for my 99 TA 6-speed here recently, and I've had more than one person tell me that a 12 bolt is better.....Though they didn't give me an explanation...

Is there any truth to this?

-Will
Old 01-13-2006, 11:32 AM
  #2  
TECH Resident
iTrader: (1)
 
UnZFeat'd's Avatar
 
Join Date: Jul 2005
Posts: 891
Likes: 0
Received 2 Likes on 2 Posts

Default

well, usually people will go 9in if they are making a lot of power with an M6, autos usually can get away with just a 12 bolt, but if you arent making that much power, id say go 12 bolt. i dont think you can get a limited slip on a 9in.
Old 01-13-2006, 12:34 PM
  #3  
11 Second Club
Thread Starter
iTrader: (12)
 
TARZAN's Avatar
 
Join Date: Dec 2003
Location: Memphis Area
Posts: 1,312
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by UnZFeat'd
well, usually people will go 9in if they are making a lot of power with an M6, autos usually can get away with just a 12 bolt, but if you arent making that much power, id say go 12 bolt. i dont think you can get a limited slip on a 9in.


Thanks.....thats what I thought,but I needed to make sure ...

And I''' be just as happy with a posi in a 9"

-Will
Old 01-13-2006, 02:47 PM
  #4  
Banned
iTrader: (8)
 
J&J Speed Shop's Avatar
 
Join Date: Jan 2004
Location: Western New York
Posts: 375
Likes: 0
Received 0 Likes on 0 Posts
Default

Well they are both great options for the stock 10 bolt. I usually recommend the 12 bolt to my customers that are under 700 rwhp, or have 3 channel ABS. Someone with less HP I would only recommend the 9" if you need the quick gear change/center section capability. There are advantages and disadvantages to each, but neither is a bad choice

12 bolt - less power to turn = less drivetrain loss, but the entire rear is heavier

9" - more power to turn due to high pinion angle = more drivetain loss, but the entire rear is lighter
Old 01-13-2006, 02:56 PM
  #5  
TECH Addict
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default

i went with a 9" just for a peace of mind. ive heard of 12 bolts breaking, but not a 9". not to say it hasnt happened, but i havent heard about it. It didnt cost much more over the 12 bolt so i figured why not. Its much stronger than the 12 bolt also. As mentioned before, it takes more power to move it, but its worth it when you can launch at 5500 or even 6k w/o worries.
Old 01-14-2006, 09:45 AM
  #6  
11 Second Club
Thread Starter
iTrader: (12)
 
TARZAN's Avatar
 
Join Date: Dec 2003
Location: Memphis Area
Posts: 1,312
Likes: 0
Received 0 Likes on 0 Posts

Default

Thanks guys, I've got a 6-speed, and I have heard that a 9" will handle a 5,000 clutch dump alot better than a 12-bolt, but I wanted to check before buying one

Thanks again,

-Will
Old 01-14-2006, 10:01 AM
  #7  
EPP
FormerVendor
iTrader: (22)
 
EPP's Avatar
 
Join Date: Mar 2003
Posts: 13,063
Likes: 0
Received 1 Like on 1 Post
Default

I can get you a Moser 9" for a great price, give me a call Monday. Bob
Old 01-14-2006, 10:11 AM
  #8  
TECH Addict
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default

he aint lying! I got my 9" for Bob and most of it came in yesterday The customer service and tech support is also top notch! Thanks for everything Bob!
Nino
Old 01-14-2006, 02:34 PM
  #9  
TECH Enthusiast
iTrader: (21)
 
LETHL_SS's Avatar
 
Join Date: Oct 2005
Location: New Bern, NC
Posts: 726
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by TARZAN
Thanks guys, I've got a 6-speed, and I have heard that a 9" will handle a 5,000 clutch dump alot better than a 12-bolt, but I wanted to check before buying one

Thanks again,

-Will

FWIW, I've got a 6speed, ~500 RWHP, and do 6.5K dumps all the time.... no worries
Old 01-15-2006, 01:35 PM
  #10  
11 Second Club
Thread Starter
iTrader: (12)
 
TARZAN's Avatar
 
Join Date: Dec 2003
Location: Memphis Area
Posts: 1,312
Likes: 0
Received 0 Likes on 0 Posts

Default

Bob,

I'll call Monday, its worth a shot....thanks

nino,

Thanks for the input

Tommy,

Glad to hear it....but....uh.....what exactly do you have? lol

-Will
Old 01-15-2006, 02:35 PM
  #11  
TECH Enthusiast
iTrader: (21)
 
LETHL_SS's Avatar
 
Join Date: Oct 2005
Location: New Bern, NC
Posts: 726
Likes: 0
Received 0 Likes on 0 Posts
Default

Huge flowing LS6 heads/ HUGE cam, ported FAST 90/90, and all supporting boltons. Oh yeah, the rear has 4.30 gears
Old 01-15-2006, 03:17 PM
  #12  
TECH Fanatic
iTrader: (28)
 
93formto98T/A's Avatar
 
Join Date: Jun 2005
Posts: 1,586
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by LETHL_SS
Huge flowing LS6 heads/ HUGE cam, ported FAST 90/90, and all supporting boltons. Oh yeah, the rear has 4.30 gears
....I think dude was asking about what rear you have. 9" or 12 bolt?
Old 01-15-2006, 04:22 PM
  #13  
TECH Enthusiast
iTrader: (21)
 
LETHL_SS's Avatar
 
Join Date: Oct 2005
Location: New Bern, NC
Posts: 726
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 93formto98T/A
....I think dude was asking about what rear you have. 9" or 12 bolt?
LOL Actually after rereading it that is prob what he wanted to know. I assumed he knew I was talking about a 12.... Anyhow, I have a Moser 12.
Old 01-15-2006, 08:06 PM
  #14  
11 Second Club
Thread Starter
iTrader: (12)
 
TARZAN's Avatar
 
Join Date: Dec 2003
Location: Memphis Area
Posts: 1,312
Likes: 0
Received 0 Likes on 0 Posts

Default

Lol, actually I wanted to know all the above ....Thanks, sounds like a fast car.

-Will




All times are GMT -5. The time now is 12:56 AM.