I was racing the camaro last night and made 3 runs with very little traction off the line then made a last pass and booooom!!!
here is a video hard to see but if u make it fullscreen and you can see better. My buddy (Dodge Dart)raced me and broke his u-joint at the same time
http://www.fquick.com/videos/viewvideo.php?id=6763
Now I don't want to fix the 10 bolt because well, it WILL break again and wasted money plus the posi was on its way out anyway.
I "think" I want a 9" but there are so many options when you price one out
I want to run abs, stock length and plan to make over 450 rwhp later, it's a six speed car and want to drop the clutch hard
whats the difference between all the posi units and do you need sway bar mounts?
option for where to buy also thanks

 

If you want to keep ABS then the 9" is not for you (no ABS available). Go with a 12 bolt or the Dana S60, which is becoming very popular now. I'd say the best place to get them would be from Strange as opposed to Moser. Strange will be a straight bolt-in rear end, while the Moser will require some assembly.

 

x2 on the s60

 

thanks for the replys
I was looking into the 9" because of size and parasitic loss
The 12 bolt is my next option but the S60 is just way over kill for me personally well I think it is.
When pricing out the 9" from moser there was a TCS and ABS option for reluctor rings
Also whats the difference between spool, true trac, detroit locker posi's?
Nodular iron or aluminum?
just want to learn as much as I can about it before I decide
thanks again
By the way I broke the rear with 290 RWHP with a 3200 dump

 

here are some pics

 

Why do you prefer the 9-inch, with heavier weight and higher losses? Then add the issues with the pinion shaft being offset to one side, and 3/4" lower, limited choice of posi's for larger axle spline count (31) and you have other problems.

What do you see as the ultimate HP level for your car? The 12-bolt is probably a good choice at this point. Low weight, reasonable losses, minimal size difference. Strange will work with all TA's, LCA relo brackets, stock DS lenght, etc. Only possible issue was the sway bar hitting the aluminum cover, but they solved that by adding dropped sway bar mounts.

Did the option list for the 9-inch read "TCS and ABS"? If so, that's the 4-channel reluctors on the axles. You only have ABS, since your damaged rear has the 3-channel reluctor on the carrier.

A spool is a 'track only" setup. The two axles are effectively bolted (splined) together, and there is no "differential" action. Very hard to make a turn on the street or park... one wheel will have to slip. The "locker" has two different operating conditions - fully open with no loads, and fully locked with load and differential movement. It will engage and disengage in corners, causing a lot of noise. Generally not a good choice for a street car.

Nodular iron case is cheaper and heavier. Aluminum is more expensive and lighter.

 

i am looking at the Advanced induction 200 cnc head and intake porting with the supporting cam poss 450 rwhp in a six speed
I want to racing for fun only not bracket racing. I want to have the posi not open up on me and last pretty long.
I was reading if you run the 12 bolt for racing you will get noises and that it is suggested to run the 9 in for street/strip

 

go 12 bolt.

 

I've had my Strange 12-bolt for more than 9 years. One gear change, and that was simply to go from 3.73's to 4.11's... not due to problems. I'm making 500HP at the flywheel on motor, and 800HP on nitrous. The Strange has held up to 5,000rpm clutch dumps on super sticky slicks (at least for the first few years, until I swapped in the TH400). It has never had a problem with noise. A buddy of mine put 900HP through a Strange 12-bolt in a 30th Anniv. SS, and the only problem he ever had was burning out the 9-disc Posi. He didn't even realize that Strange had a 15-disc "super strength" Eaton posi as an option. He did switch to a very well built 9-inch when he pushed the HP up to 1,325..... but it was a very costly 9-inch, not the one you could buy for $2,200.

I would say if you have an M6, and plan to make 10-15 passes every weekend, you might want the S60 (Moser is now making their version of the Dana 60, as well), or a 9-inch. Some people have had problems with that kind of useage.

 

looking to maybe make 40 passes a year but I mainly want a rear to stand up to the abuse of maybe 450 rwhp and nice launches at the track. I will def look into the 12 bolts (actually would rather stay GM then ford). What all do I need to make it a "bolt in kit". I have spohn 21mm rear sway. Would going to the HD 15 clutch posi be overkill for me or would it perform like the 9 disc(driveline power loss wise). I only have 290 RWHP now and don't really want to get any less than I have to, but want it to stand up to what I do in the future.
Thanks for the information

 

The Strange 12-bolt is totally "bolt-in". Works with all the factory parts, and all the aftermarket parts that are labeled "stock and Strange 12-bolt". I have an online install guide.

http://members.aol.com/InjuneerZZ/Strange12.htm

 

Have you heard that the on/off style of stick on the factory located Torque Arm mount on the 12 bolt leads to pinion fatigue and resulting in gear noise and poss premature failure. The 9 " has a very secured pinion with 3 load bearing bearings Thats why I have been leaning torwards the 9 ". I also need to upgrade my driveshaft from the stock steel that vibrates to a new one (so a 1 inch longer driveshaft is doable). I read that the Moser 9 " and the Midwest Chassis Fab'd 9 " fit very well. But I have never seen one in person. The midwest chaassis fab'd 9" also now offers ABS (don't know how but it says they do).
Now this must sound like I made up my mind already but trust me I am far from ordering anything without total understanding and installation opsticles along the way.
I do thank you for all the information now and in the past and you havn't lead me in the wrong direction