12 Bolt rearend

[silvercam]

I am looking for a 12 bolt rearend for a 1999 Z28?

[transampimp]

If you own a 6 speed, I would consider a 9 inch over a 12 bolt if you plan on going to the track.

[PWND3r]

If you own a 6 speed, I would consider a 9 inch over a 12 bolt if you plan on going to the track.

Why does everyone say this? I have an M6 with a 12 bolt.

[WMCCjames]

Because 9" rears are better, stronger and easier to fix when the gear alignment gets jacked up.

[transampimp]

Why does everyone say this? I have an M6 with a 12 bolt.

They are both strong. If you plan on doing hard launches at the track and daily driving your car then you could run into a noisy 12 bolt. Something about the torque arm mount on them flexing the housing. I was also told that the pinion can move over time just like the 10 bolt? I'm not an expert, but was told that the added stress a M6 can create you should consider a Ford 9inch.

[Phantom409]

9" all the way

[LS1Formulation]

My buddy has a '00 Formula M6 with a twin turbo LS1 and he runs a 12 bolt with no issues. Not sure if I'd run one in my car, but it does happen.

[silvercam]

They are both strong. If you plan on doing hard launches at the track and daily driving your car then you could run into a noisy 12 bolt. Something about the torque arm mount on them flexing the housing. I was also told that the pinion can move over time just like the 10 bolt? I'm not an expert, but was told that the added stress a M6 can create you should consider a Ford 9inch.

I may go that way then, any suggestions on a certain brand?

[1BADAIR]

12 bolts are junk in a 6 speed. i can show you pics of some of my broken parts. had to goto a spool to keep from breaking it but it still has to come apart all the time to reset lash cause the housing moves so much

[MP81]

I'd go with a 9"