Ford 9" as a replacement for 8 3/4

[PeteyDaMan]

Hey all,
I'm looking to upgrade my 8 3/4 for something stronger. I'm afraid I'm going to destroy my 8 3/4 while dumping the clutch on the dragstrip.

I know Strange has a great S60 setup but I like the option of having the removable gear sets.

Speedway Motors has a Fabricated Ford 9" setup for a decent price and it looks pretty beefy.

https://www.speedwaymotors.com/Spee...rend-Axle-Housing-Kit-58-In-Width,297526.html

Anyone using one of these and is it strong enough for a 4 speed and the track?

 

[bolson6333]

31 spline axles are weak link IMO.

 

[RemCharger]

^^^^ at least a 35 spline, if you're already spending money

 

[Don Frelier]

Sure you need to do it?
What are:
Engine, Trans, Gear, Tire Size and suspension setup?

 

[PeteyDaMan]

Sure you need to do it?
What are:
Engine, Trans, Gear, Tire Size and suspension setup?

I just copied this out of a different thread so it has more info than you asked for.

71 Charger with a mostly stock suspension.
Super Stock leaf springs
1.03 torsion bars
Bilstein's on all 4 corners
QA1 tubular upper control arms
Borgeson steering box
8 3/4 with 489 case with Richmond Gear 3.55 sure grip
MT Drag radials 295/55-15

Engine:
512 Eagle Stroker kit
10.4:1 compression on 93 octane
Comp Cams hydraulic roller cam laid back 4 degrees 286/294 .544/.541
Eddy RPM heads
Eddy RPM intake
AED 950 cfm carb
TTI 1 7/8
MSD 6AL and billet dizzy

Tranny:
18 spline A833 built by Brewers
McLeod twin disc clutch

 

[toolmanmike]

I just copied this out of a different thread so it has more info than you asked for.

71 Charger with a mostly stock suspension.
Super Stock leaf springs
1.03 torsion bars
Bilstein's on all 4 corners
QA1 tubular upper control arms
Borgeson steering box
8 3/4 with 489 case with Richmond Gear 3.55 sure grip
MT Drag radials 295/55-15

Engine:
512 Eagle Stroker kit
10.4:1 compression on 93 octane
Comp Cams hydraulic roller cam laid back 4 degrees 286/294 .544/.541
Eddy RPM heads
Eddy RPM intake
AED 950 cfm carb
TTI 1 7/8
MSD 6AL and billet dizzy

Tranny:
18 spline A833 built by Brewers
McLeod twin disc clutch

Dumping the clutch on 650 horse? I think I'd go with a Modular 9". Quick Performance is another place that specializes in those. Quick Performance: Differential Parts & Components

 

[khryslerkid]

Dr Diff carries some F#$d items also.

 

[gkent]

Think really hard about how often you'll change gear sets !!!

 

[andyf]

Doctor Diff can set you up with whatever you need. I had him supply me with a complete Strange 9 inch for my last project. Pulled the Dana out and sold it and installed the 9 inch.