Z28SteveA4

iTrader: (16)

Im stumped on which rear to use. I hear horror stories of people breaking 12 bolts these days and I know dana 60's are way to much of a rear for my use. Should I try a 12 bolt which id prefer or go with a 9" which im leaning more towards?? This will be a street strip car but a lot of time at the track when done.

Here's my plans:
Street strip car
Heads cam ls6 n/a
aiming for 10.5's in 1/4 mile
Running a slick
Using a built 4l65E
at least a 4000 converter if not a little bigger

So what would you guys suggest from experience??

HCI2000SS

iTrader: (2)

Since you will be using slicks and seeing a lot of track time, i'd go with the 9"

Z28SteveA4

iTrader: (16)

I had a feeling that what would be suggested. what about a trutrac or trac-loc??

HCI2000SS

iTrader: (2)

Yeah that's not a bad idea (I run a trutrac on mine) and would help, but if it were mine i'd just go with the 9". This something I would want to do only one time lol

Z28SteveA4

iTrader: (16)

I don't cut corners and I do things once anymore. you are happy with the 9" and trutrac obviously then lol how often do you race your car and drive it on the street??

jrpimp00

iTrader: (17)

9" and a wavetrac would be my choice, that way if you ever want more power you wont end up breaking that trutrac

01ssreda4

iTrader: (96)

You've heard horror stories of people breaking 12 bolts running 10.5 ETs with an auto trans? If you have tell them they are idiots. I'd almost trust a 10 bolt to those duties......almost. The 12 bolt is a great rear end and people around here don't give it the credit it deserves. I will say, so far my Strange has not exhibited any of the "gear noise after hard launches" like many claim 12 bolts will (I think primarily Moser). Remember, an s60 and 9inch will slow your car down more then a 12 bolt due to more parasitic loss. Here's my strange going in:

https://ls1tech.com/forums/gears-axl...t-install.html

Guitar

iTrader: (9)

Do not get a trac-loc.
Truetrac ftw. Streetable and mine has worked good on the strip for my power (and I'm an M6 car). Either that or locker which is a bit less streetable but stronger. I'd go for a 9" over a 12 bolt any day personally...but that's just me.

01ssreda4

iTrader: (96)

And I'd go 33 spline over 31 any day. Seems like everyone has their opinions.

Z28SteveA4

iTrader: (16)

i know two people that broke 12 bolts running slower times but in m6 f-bodies. That's whats kind of pushing me away from the 12 bolt and more towards a 9". I also say 10.5's now but its going to end up being low tens later on. Im going to be doing a lot of drag racing and a lot of hard launches with this car when its done so I want to make sure the right rear is under this car.

Guitar

iTrader: (9)

Or 35.

Carl at CRP

iTrader: (9)

Please give Me a call (316) 299-8427. I would be glad to go over the pros and cons of whats offered and what fits Your needs.

Carl

01ssreda4

iTrader: (96)

^^Yep Carl can fix you up!

ssvert99

iTrader: (26)

The 12 bolt is a great rear in the right application. You are doing track use and have slicks... I would bet if you call Strange they will recommend the S60, and most likely with a spool. Will the 12 bolt live... sure. The S60 is much more durable and even a bit less cost, but there are drawbacks of increased weight and fewer gear ratio choices. The S60 will come with 35 spline axles where the 12 bolt will come with 33s. On your particular setup 33 will be plenty, but as your car build grows your drivetrain should follow. If all you ever plan to do is mid-10s, then the 12 bolt will most likely suffice, however most people don't ever plan on going slower so you need to seriously consider your long-term goals. The 9" rear has more options and will be by far the lightest weight package(upwards of 80 pounds for the most popular MWC fabricated 9" package).

I can go over all the pros and cons of all 3 rears so you can get a better understanding of what and why. MWC has the best products with years of street and track experience to back it all up when you need install and tuning help. Combine that with the guaranteed lowest prices and you have the best deal in your hands for your hard earned money. Give us a call and we will be glad to help!

Siciliano15

iTrader: (7)

Except if he wants a 12bolt. Carl doesnt sell those.

Z28SteveA4

iTrader: (16)

im going to have to give the sponsors a phone call and really get a better idea on whats better for my application and use. Thanks for all the help guys

01ssreda4

iTrader: (96)

Well I have a 12 bolt in my car that doesn't agree with you.

JakeFusion

iTrader: (7)

He's right. Carl isn't selling those anymore.

I think for guys with automatics and drag radials, a 12-bolt is all you need. It's still cheaper, lighter, and has less parasitic loss than other options. The only real game in town with the 12-bolt is Strange. The Moser Torque Arm attachment isn't something I'd trust.

If you plan on pushing big power, the S60 or a fabbed 9" is the way to go. The S60 being a much better budget option and the Fab 9 being lighter and more customizable to what you might need. There are other companies besides Moser who have more conventional 9" housings and they might provide more of a middle ground. The 9" is easier to rebuild, has more selection, and can withstand lots of abuse.

01ssreda4

iTrader: (96)

Good info, I'm gonna hit up Carl and get the skinny.

RAMPANT

iTrader: (17)

I broke my Moser 12 bolts lots, but I have an M6, grabby clutch and was on slicks. 3800lbs and a 1.47 60ft.

I have 2 friends, went low 10s on 12 bolts with A4s, biggish stalls and never broke a thing, not even noisy gears. The one guy went high 10s on his 10 bolt. Mine broke in the low 12s.

There is a Wavetrac with 35 spline for the 12 bolt if my memory is correct. So you could build a very strong 12 bolt for use with an automatic. They are lighter, and consume less power. Not as light as a Fabbed 9 though.

I personally have the MWC 9 now with the 35 spline Wavetrac, but again I am an M6.

Good luck!