I have 2:73 posi and I want 3:42 posi what would need to be done to convert my stock setting into the one I want? I am really confused about this.

 

I am not sure if the carrier would need to be replaced as well, but setting up a new gearset is not impossible. You will however need to purchase some new tools.

1.Inch pound torque wrench, needle type NOT the breakaway version and the scale should be 0 to 40 inch lbs max. You will be reading in versy small amounts so you want a smaller scale to keep the accuracy the best.

2.Shop press for changing the bearings

3.Bearing spreader for removing the bearings

4.Dial indicator and magnetic base.

5.Time,Patience, and Time, and more patience,

The above is not a complete list, you still need the tools to get the read end out and such. I also am not sure if the bearings are pressed on the axles or if they are in the tubes, someone else can answer that part.

I have set up several DANA axles on my Jeeps, and the Ford 8.8, but I have never been inside the rear ends on the Camaros.(Yet ) Get a good shop manual that gives you the specs on Bearing preload and backlash for the ring gear. Other than that it just takes some time to get it right. The local shops in my area charge anywhere from 200-300 to set one up, thats labor only. I spent about that getting the right tools, but I have since then setup over 5 gear sets, so they are paid for. the hardest part is geting the patter to look right, you cannot be to carefull here. Resist the urge to accept one that looks OK, wait to get it right. Other than that it is not beyond the capabilities of the average mechanic. It just takes time and patience.

 

Unless you use a PowerTrax conversion, the carrier will have to be changed.

Since you want to change ratios as well, it makes more sense to get a 3-series posi carrier along with the gears, since a posi carrier and PowerTrax cost about the same. And, unless you plan on doing this often, you might as well get it done at a competent shop. I'm paying $150 labor to get the 10-bolt done in the '57 (the other $600 is parts, not including a posi carrier, to have it right when done).

 

IF your current posi is good you won't need another one. If you look in Summit's catalog you will see 2 gear sets listed for each ratio, one for 2 series & one for 3 series. You will have to get one for a 2 series carrier.

 

What is the powertrax conversion? What gears do you guys recommend for a ZZ4 crate motor to get the most out of it?