1,600 pounds and LS power!! Brunton M-spec

[subtlez28]

Cheater bar was one of the legs off our engine hoist. They are usually removable for easy storage. Yeah, I think you could get enough torque using that to strip just about anything. Looks like a fun project.

Correct on all counts!

Shaun,

What kind of flange is on the diff? I would explore a few options before replacing the bolt in yoke with a slip yoke. How is the trans aligned with the rear end? Are they basically inline?

Andrew

Odd three bolt flange. I was also leaning toward making the flange work, but am getting differing advise from Brunton. I may contact the company I purchased my Jeep Rubicon drive shaft from. Rubicons do not have slip yokes. The drive shaft itself has a slip section. I think the issue is the CTS-V flange is odd, so an adaptor ($$!) is needed. The Jeeps for instance run a 4 bolt flange.

The trans and diff do appear to be in line, though I am struggling to get accurate measurements. I can adjust driveline angle via motor and trans mounts. The diff is in a fixed position.

Great Build Shaun, Would love to undertake a project like this at some point. You cant go wrong with big engine small car :D

My question is did you choose the CTS diff or was that part of the M-spec kit? I just know there has been some issues with CTS Diffs howling and whining. GM rectified this problem in 2006 with a beefier differential.

Thanks. The diff is not included but the chassis is set up for it. I know about the CTS-Vs ruining these diffs, but keep in mind, this car weighs way less than 1/2 what a Caddy does. Also, the new unit I have has a stamping right on it from Getreg saying "Noise test - OK". My hope is the new diffs are up to the task.