and the ABS... that really is a nice feature

 

since we are talking about rears, what is the main differences in 9inch from 12 bolt. I am pretty sure 9 inch is stronger, being m6 preffered. ( I am guessing it can take a bigger hit from launch)

 

97LT1: 12 bolt would be plenty strong enough for your car, even with an M6. The 9 inch is stronger, but it's also more expensive and heavier.

There's also the Dana S60, which is cheaper than both, heavier than both, but supposedly has less drivetrain loss than both. (both = 12 bolt and 9 inch)

I wanna know what size axles and what posi most people are going with.

 

Another thing I have seen that people have is Ford 8.8 rears in F-Bodys. How does this work?

 

Where does one get a Ford 9" for 4th gen Fbody?
Is ther one plug and play or do you have to fab it up?

 

Moser Engineering makes a 9" for our cars

 

Currie makes one too, but I believe you have to build it yourself.

http://www.currieenterprises.com/cestore/12boltgm.aspx

 

There are very few if any people that still do this conversion. It seems like it'd be a nice budget setup, but it's hardly that. It just isn't profitable to make them.

 

why is a 12bolt not as good for a m6 car? i was under the impression 12bolts were pretty bulletproof...

 

the way that the torque arm mounts between the strange and moser 12 bolt unit is different as well, some suspension companies wont back their torque arm if it is used on the moser because it uses 4 bolts that are threaded in to the housing instead of two bolts that go through like the stock housing

 

That in itself sucks about the 12 bolt.

 

I am planning on putting a shot on my LE3/LE4 383, you dont think I would benifit from 9 over 12? How much of a weight difference is there?

 

ABS <--whats that Mine went out with the old motor setup, now I have no ABS, No traction Control, No emissions, but I still have the A/C But I don't drive my car in the rain, but I haven't had any problems at all with my car not having ABS but thats just me, everyone is different

 

The dana 60 is stronger than the 12 bolt and the 9 inch. 12 bolt ring gear is 8.875 inches, the 9 inch is 9 inches duh, and the dana 60 is 9.75 inches. Now do you you see why the dana 60 is stronger? The 9 inch does have 3 pinion bearings though which does help a lot, that is primarily why it is stringer than the 12 bolt wich only has 2 pinion bearings. Hope this clears all this up a bit.

 

hey TravisTA- would you happen to know how much heavier the s60 is than the 12bolt? just curious

 

I think the Dana 60 is about 20-25 lbs heavier than the 12 bolt, and the 9inch is like 15 lbs heavier than the 12 bolt.

 

My mechanic went from a strange 12 bolt to strange Dana60 both with 3.73 gears in his mid 10 second LS1. He picked up 0.2 in his 1/4 time.