ZONES89RS

iTrader: (25)

I abused the living hell out of my 12 bolt moser and it never flinched with my 6 speed and never made any noise. Was in there for 5 years with a cammed 6 liter on gas and now is in my 86 TA still doing work.



Saw a ton of track time and every weekend getting beaten.

jhshnh

Thats good to hear. I think my A4 will be more forgiving. Lol

ZONES89RS

iTrader: (25)

Well, the damn thing sure overcame the hard launches much easier than defeating the ability to come off the clutch at well over 6000 RPM that is totally unnatural.

HioSSilver

iTrader: (8)

gmht did a test a couple years ago on rears to.....but I can't find it right now.

jhshnh

So do you guys prefer the Strange 12 bolt or the Moser 12?

01ssreda4

iTrader: (96)

Strange.............

ZONES89RS

iTrader: (25)

Yup, cannot say for certain but I thought the power loss went 12 bolt, 9" and then 60. But it has been so long I would not be surprised if I was wrong.

01ssreda4

iTrader: (96)

http://www.hotrod.com/how-to/transmi...ear-axle-swap/

Midnight02

iTrader: (8)

Great article. Nice to actually see some hard data comparing the three rears on the same car.

jhshnh

Great article is right. I'm pretty much sold on a 12 bolt at this point. My question now is the Strange 33 spline or Moser with Wavetrac 35?

blackandgold

iTrader: (2)

I vote strange, they seem to make a really solid product. Is that the S-trac?

jhshnh

Doesn't say on the website. The only differentials for 12 bolt Strange sells separately are the Yukon HD.... never used them.

mjs1012

iTrader: (36)

Im a bit biased but I really love my s60 with the s-trac. It was very easy to install and is very quiet. Although it is heavy, Carl at CRP told me it wouldn't slow me down any.

The main reason I bought my s60 was because it was a great price and I got it through Carl. He stopped selling the 12 bolt before I bought my rear, but if he still did I wouldn't have thought twice about buying one. The 12 bolt is a very stout rear and there's many single digit cars running them.

HioSSilver

iTrader: (8)

Thats the way i remember that test goin to.

My fab 9 is only about 10lb heavier than my 10bolt was. But have the aluminum center and the mwc tq arm is lighter than stock to.

MidwestChassis2

iTrader: (1)

If built certain ways we can get the MWC 9" lighter than a stock 10-bolt and over all weight differences is where your going to see gains than in the slight differences in power train loss.

All things equal between a stamped nine inch, stamped 12-bolt, or stamped S-60 will show zero differences at the track on your average vehicle. Start removing weight out of the vehicle and you will start to see gains faster.

HioSSilver

iTrader: (8)

For sure MWC2....if one want to do drilled axles, lightened ring gear and a spool a fab 9 could easily be lighter than a 10bolt. Mine is basic street car **** with a aluminum center.

As far as at the track I went from a 131.3 mph best trap with the 10bolt to a best trap of 130.4 with the fab 9.....but I have been quicker on the fab 9 and I can drive it to the track now with no worries. I also think with a better tire there is more et left that the 10bolt just could not achieve.

Dark SS

iTrader: (6)

8.8 is another option. Cheaper than all 3 and can be as strong as a 12 bolt from what I've read.

01ssreda4

iTrader: (96)

An 8.8 is the same as a 12 bolt, same ring gear size and uses the exact same bearings internally.

MidwestChassis2

iTrader: (1)

An 8.8 has it's place but like many other housings it shows it's age with abuse a lot faster than others. That's a reason guys with fast fox body chassis eventually move on to a 9" of some sort. They go through gears yearly even all braced up.

blackandgold

iTrader: (2)

Not really all that cheap either, unless you have mad fabrication skills and can put one together on your own. The hawks 8.8 is like 3k out the door...