I just bought a rear end from a 84 camaro that has 3.73 gears in it. Before i put it in my car i would like to add a posi and 28 spline axels.I have read on a few places that 28 spline axels and the carrier will not fit.

I was looking at this one.
http://www.ebay.com/itm/gm-chevy-chevrolet-gmc-buick-olds-10-bolt-7-5-7-5-8-7-625-posi-lsd-locker-/111205058782?pt=Motors_Car_Truck_Parts_Accessories&hash=item19e45688de&vxp=mtr
thanks for your help guys.

 

That's the Eaton Gov-Bomb aka Grenade-Lok. DO NOT put that in your car. There is NO WORSE GARBAGE than that.

28-spline axles and a 28-spline carrier will fit just fine.

 

Give this man a call and explain to him what you have and what you want.
This is a very reputable shop and he has some of the best prices around.

http://www.tomsdifferentials.com/tomp.htm

 

You can use 28 spline axles from a '90 to '92 Camaro and a 28 spline differential in that rear end.

Do NOT use a Governor Lock or Auburn. The Eaton Posi, Yukon Dura Grip, Eaton Truetrac or Torsen would all work fine. Some work better in different situations.