How strong is the 8 3/4"?

[93yelLE]

Don't know if I want to invest in building the rearend currently in the car. I'm hoping to go high 11's once I get a gear, then putting on a 250 HP Cheater system, which I'm thinking will go beyond the limitations w/ this rear. I have a 9" that needs to be rebuilt, too. The only added cost would be shortening the housing - everything else that would be done to it would also be done to the 8 3/4".

The car is around 3600# w/ me and an automatic so power transfer isn't too violent.

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67 Belvedere I
Stout 440, rest of car is still under construction but almost street worthy
(Looking for passenger's side taillight lens, if ya know of one)

93 Yellow Limited Edition Mustang Convertible
1 of ~450 made w/ black top/interior and 5-speed
High 13's on really crappy days - Quick enough for a daily driver... NOT!

[Stan Cameron]

I run a 8-3/4 with spool & M/E axles for 4 seasons. Changed gears once. 69 Road Runner ran 11.50s to 11.06 car 3500# with driver. Foot brake car no trans brake.

We changed engines and ran 9.74 @ 138, car now 3000# with driver. Still using same 8-3/4
just changed gears again.

Have seen alot of 8-3/4 break when used with trans brake.

Good luck with yours

Regards,

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Cameron's Racing
Division of GOTNUTZ?
MotorSports
66 Belv 2 440 auto 10.76 @ 125
69 Road Runner 426 wedge auto 9.74 @ 138
99 Dakota Pro Stock type
truck (under construction)
79 Lil Red Express Truck
96 2500 Ram 5.9
99 Durango 5.9

[This message has been edited by Stan Cameron (edited June 01, 2000).]

[This message has been edited by Stan Cameron (edited June 01, 2000).]

[MopART]

Better than the Ferd 9" and the Chuvit 12 bolt... The only better car rear is the (mopar)Dana 60..

You ain't gonna break the rear. The gears are a different story... just buy good gears.

ART

[Beeracuda]

The biggest problem with the 8 3/4 is the lack of pro gears. The only set available is the 4.86 for the 742 housing. We've broken 4 sets of street gears (5.13's) with our transbrake equipped car. We installed the 4.86's expecting the car to slow down, but it didn't.

Both the 8 3/4 and the 9" need a back brace. Without it the rearend has a tendency to bow forward. We made ours with 1/4" plate in a ---+--- pattern.

Monty

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Monty Brown
74 Barracuda
446 / PG
10.23 /134

[Tim_K]

The latest issue of Hot Rod magazine has a good article on rears, all kinds, not just Mopar. It was interesting enough for me to buy a copy, not just glance at it at the newsstand. They say a stock 8-3/4 is good to 500 hp. The way the story was written, they seem to be more concerned about an axle shaft actually breaking more than anything else.