ok, Holley Finally got back to me. they recommend 3.55-3.70 rear gears. i have 3.00 right now and i want 3.55 with trac-loc.

so what all do need? Gears, Ring and Pinion, 3.55:1 Ratio, and some kinda locker?

http://store.summitracing.com/partde...5&autoview=sku

somethng like this?
http://store.summitracing.com/partde...5&autoview=sku


and what do you guys think of this torque converter
http://store.summitracing.com/partde...2+4294791122+0

 

You'll need the gears (ring/pinion), your choice of carrier (detroit locker/traction-lok/auburn etc.), bearings, shims, orings, a gasket etc. (these sometimes come in an intallation kit), traction additive, and ofcourse fluid. Take a good look at the axles when it is apart. I went through this about five years ago. I also had a 3.00 open and chose to replace it with an Auburn locking carrier with 3.70 gears and swapped the axles from 28 to 31 spline. All told the parts were $1250. Currie says this setup will withstand up to approx. 600HP. Even if you shop elsewhere, their site offers a wealth of info.

http://www.currieenterprises.com/ces...ll9inford.aspx

 

How about one of these? Disk brakes, limited slip....the whole shabang.

http://cgi.ebay.com/ebaymotors/96-98...QQcmdZViewItem

 

Or try this.

http://cgi.ebay.com/ebaymotors/Ford-...QQcmdZViewItem

 

Yeah, if you have never built a differential before, I would advise that you either have it done for you, or have an expert help you. There is more to it than just taking out the old and adding the new. You might want to consider getting a 9" already built like the second pic he showed you. That would be my choice.

 

i was going to get everything i need and then take it to the local shop down the street.

chillin, those are good things, but i have an 8 inch rear, and im trying to stay cheaper. i dont want to have to tap into the money i have put away for 6 months insurance

 

Ohhhh, didn't know it was an 8, I'm surprised. How bout these.

http://cgi.ebay.com/ebaymotors/Ford-...QQcmdZViewItem

http://cgi.ebay.com/ebaymotors/Ford-...QQcmdZViewItem

I'm not sure you can buy all the stuff you will need seperate and then have the 3rd member assembled by a shop for less than the above examples.

http://www.currieenterprises.com/ces...e.aspx?id=2149

http://www.currieenterprises.com/ces...e.aspx?id=1415

These are the two biggies and the rest of the stuff is gonna run at least another hundred plus the cost of assembly. Lemme tellya though, the payoff is huge, gotta love Posi baby. [8D]

 

yea, hmmm, too bad, i almost ordered a complete differential trac-lok, 3.00 gears for an8 inch rear for $325. tooo bad i couldnt get that in 3.55 gears.

 

if im using the same 8inch housing, same axles, and splines, couldnt i just get a trac loc carrier and bigger gears? would that work??

 

You could just get the 3rd member and use the existing housing/axles. You'll save some installation money, see which would be cheaper.

You'll probably want to upgrade the axle shafts, though. Just to be on the safe side.