Gary the parts cost will only consist of a Limited slip differential of your choice and that is it. You reuse your stock CV shafts (axles), stock carrier, and stock ring & pinion gears as well as the shims (if they are in good condition). For a somewhat skilled home mechanic the swap will probably take no longer than 2 hours while screwing around.
The LS diff is 28 spline and the Mark VIII diff's are 28 spline. The 99-01 Cobra's use a 28 spline 8.8" diff too. Stock gearset will be reused unless you are want to swap up to the Gen 2 LS 3.58's. Stock driveshaft reused.
Yea I get that. I have done 60 or 70 rear ends in my 32 years as a techI went back and started re-reading this thread. You got your answers in the first 4 posts.
So the short answer is that any 28 spline 8.8 limited slip will work in the Gen 1 LS. You just re-use the original ring gear that was in the open diff.
The set up, installation, and adjustment can be a bit tricky... so if you have never done this type of work before, you may want to have a professional do it. Otherwise you could grenade the rear end. If that would happen at high speed... the results could be fatal.
So it has to come from a mark 8 or 97-01 cobra? Any 8.8 won’t do? Previously in the post it says 8.8 of your choose but then mentions mark 8 or 97-01 cobra
Todd and smegun,
You have the luck of owning a Gen 1 LS. The housing is slightly different from the Gen 2... and the Gen 1 will accept an 8.8 posi unit allowing it to pretty much drop right in the housing... allowing you to use the factory gear set.
I don't remember the details... other than the 8.8 posi had to be the 28 spline version, (like from a Mustang)... to match the axles of the LS.
You might want to dig around in the "LS performance" section of this forum... and maybe contact member "Quik LS" or "Cammer FE", (if they are still around), for more details.