66 conv. 302 5 speed 8" rear

[sdsteve619]

Why not beef up an eight inch rear? How much would it cost to add a posi unit and change gear ratio? i'm new to this and it seam so much trouble to use a 9/8.8 inch. Thanks for your help.

 

[2+2GT]

Good call. There are 8" 4-pinion Traction-Lok units available now that are stronger than some 9" rears.

 

[iskwezm]

i built my 8" about 15 years ago with a Currie 4 pinion TSD and billet side cover and its taken A LOT of abuse.

 

[blueovalnotch65]

I built my 8" about 7 years ago with a Detroit Tru-Trac and it too has been through a lot with no issues.

 

[chris66dad]

You can buy a center chunk with custom gears and trac loc for around $800.
They are good for 550 HP.
You should also change out the axle bearings and seals for another $100 in parts and labor

http://stores.ebay.com/8-AND-9-INCH-FORD-REARS-TJ1141?_trksid=p4340.l2563

 

[Realmongo]

I built my 8" about 7 years ago with a Detroit Tru-Trac and it too has been through a lot with no issues.

X2 for the Detroit Tru-Trac with 3.25:1 Motive Gears.

 

[Vinyl66]

I'm with the others. Detroit locker and 3.55 gears in my 8" rear with many dragstrip passes deep into the 11's. Still going strong.

 

[65fastbackresto]

I also had my 8 inch rear built.

I took it to an offroad shop where they work on 4 wheel drives alot. Cost me $1100 for a 355 posi that has also been beat up alot.

I have a buddy thats had an 8inch rear in a strip car with drag slicks on it for 20 years, these things are pretty tough.

Oh, I just noticed your running a 5 speed, I`d go either 390 or 411 gear ratio with that tranny, if I could reverse mine and do it over, thats what I would do, the 355 I have is too low, I cant shift into 5th gear till about 70 mph.

 

[sdsteve619]

Thanks for all the help. I thinl I'll go with D.L. and new axles.