After reading hundred of stories about blown 10 bolts, I want to upgrade my rear end sometime in the future. After seeing how expensive it is, I want this rear to last! I'm leaning toward the s60, since it seems to be the beast of the 3. What are its downsides, besides being heavier and losing a little more power to the wheels? The 9in also sounds nice, being able to switch gears easily. The only way i'd buy the 12 bolt, is if I got a good deal on one (i've read of a few breaking). Any opinions welcome, thanks.

James

 

i have a strange 12 bolt and love it... cam only so far and holds up fine with 4.10s

 

S60/12-bolt you can keep the ABS; 9" you have to kinda fab-your-own way if you want to keep it.

S60 IS the strongest of the bunch.

 

with a 9" you have to get a new drive shaft too because of the pinion angle is lower but i would go with the 9" or 12bolt. everything by moser

 

strange is nice also. fit perfectly

 

You have to with the S60 as well; and most times with the 12-bolt too....

 

What are your power goals? Do you plan on going to the strip with slicks?

 

Car will be street driven for 2 years (Hopefully I can install in a weekend). After that would be like somewhere in the 450-500RWHP range.

 

Then go with the 12-bolt. It's the lightest and is more than strong enough to handle that power level.

 

What about 5k clutch dumps? Probably on drag radials.

 

I'm not speaking from personal experience, but yeah, my understanding is that a 12-bolt will handle that. The typical break point is around 700-800 rwhp.

If you want the extra peace of mind anyway, the Dana 60 is only a little bit heavier (25-30 additional pounds, similarly equipped), MUCH stronger, and often a bit less expensive. Just keep in mind that the extra weight is unsprung weight and will have a negative affect on ride/handling, especially on choppy pavement.

 

Thanks for the info. Where can i find the cheapest price on the s60?

James

 

Do a little research on how the pinion gear is supported in a 9". Then you will know why it is so popular. Dana 60's are known for being noisy after only a few hard launches.

 

How much more expensive is the 9".

 

I'm making 800HP/800 lb-ft at the flywheel, with the 300-shot of nitrous. When the engine was originally built, the tranny was a T56 with a Street Twin/steel flywheel. The Strange 12-bolt had no problem with 5,000-6,000rpm clutch dumps (no spray on launch). But I didn't race it much.

The people who have 12-bolt problems are the ones who run the car every week at the track, a dozen or so passes, with the big clutch dumps. If that's what you plan to use the car for, consider the 60 or the 9-inch.