I ordered my rear today. The most out of my current engine setup will be around 450hp with this third member. I will be around 650 in the future and may need a (N) section . It comes with

-New 3" housing tubes fully tig welded to center housing.
-Stock third member ( not N )
-GM housing ends.
-Timkin bearings
-Moser 31 spline axles
-1/2 x 2 wheel studs
-Motive 3:25 gears
-Ford Trac-Lock , clutch style posi

Before I get into who's doing it and how much I need to know if I should upgrade the posi unit now with 450hp? or when my HP goes up just replace the whole pumpkin? Or pull apart the existing one and use the Eaton if I get it? I can get a Eaton TT-913A586 for $100 more.

I have learned its easier to build your vehicle as strong as possible the first time instead of doing things twice due to breakage and the addition of more horsepower.

I have learned its easier to build your vehicle as strong as possible the first time instead of doing things twice due to breakage and the addition of more horsepower.


X 2

X 2

I hear ya.. but I'll prob go with 3:73's or 4:11 in the far future and just replace the pumkin. 31spline axles are pretty strong.