I was wondering if you pulled out all the stops on a stock 7.5" 10 bolt rearend would it be bullet proof? What would it entail and would it be cost effective?

 

There's a build-up on the following link:

http://www.ws6transam.org/fcar.html

JamesC

 

There is a technical article on this site as well, but I don't think anyone would ever call a 10-bolt bullet proof.

 

So basicly, No you cant and don't waste your time comes to mind.

I was thinking maybe 600hp would be the limit but 400? That tells me it's not worth it. Unless sombody here has a car making 600+ at the wheels, with a ten bolt then maybe it would sway me back the other way.

 

if you can afford to build a car with pushin 600 at the wheels, you can probably spring for a 9 inch or 12 bolt.

the biggest enemy of 10 bolts is shock. you get alot more usage out of one behind a auto then a stick, but it probably still wouldnt do 600

 

From my experiences. Even the stock 10 bolt will hold 400-500 rwhp as long as you are not running low gears (anthing more than a 3.42) for QUITE A WHILE. And you aren't dead hooking on the street or track.

Absolutly nothing is bullet proof. Even a 9" spooled with 33 spline axles will eventually break.

 

i just thought why not try to make it work since I already have it in the car. But you all are right a solid moser 12 bolt with 35 spline axels is they way to go. I just thought nothing ventured nothing gained.

 

I blew my stock 80k-mile gears to pieces with some 2.25 60' times first time at the track with 2.73s.. The gears actually broke a few days later, but I'm assuming it was because of the dragstrip..

 

I have destroyed too many 10 bolts. I have yet to destroy my 9 bolt diffs (knock on wood) even those won't take the high HP I will be running

 

I have a ten bolt that has held up to numerous launches on nitrous and slicks. 1.6 60' times consistently. 1.62 geing the best. The rear has only an Auburn posi and Richmond 3.73's. This car runs 6.90's in the 1/8th. It's been in the car for about 4 years now. Oh, the axle tubes have been welded up also. This prevents flex.

 

AS FAR AS MAKING THE STOCK REAR STRONGER THE ONLY THINGS YOU CAN DO IS WELD AXLE TUBS,ADD T/A REAR COVER, GO WITH AUBURN PRO POSI UNIT,AND CROSS FINGERS!OR CHANGE OVER FROM 26 SPLINE AXLES TO 28 SPLINE (WITH BIGGER POSI)THE WEAKEST LINK WILL MOST LIKELY BE THE RING AND PINION BREAKAGE.(JUST TOO SMALL FOR 300HP+)

 

I believe 87 TA in the drag racing boards is running stock ten bolt and its holding up on 10.98 1/4 mile passes. A big 406 superram motor and 1.5-1.6 60's. Thats incredible and probly not the norm but its running good as is now.

 

you see thats what i'm talkin about! Can you shoe horn anything bigger than a 28 spline axel? say maybe a 33 or 35?

 

as far as trying to use axles bigger that 28 spline forget about it can't use anything larger they wont fit.If you go with the 28 spline route i believe you can order buick grand national axles that go right in and are about 40% stronger than the stock 26 spline.Don't get me wrong the stock rear is pretty damn strong for what it is even with the little upgrades i did to mine it has gone a best of 10.57 1.49 60 ft. 1/4 mi. (150hp shot NX)still holding together after about 60 runs at the track.

 

That's pretty impressive. I hope to dip low tens also, so maybe thats the way to go.

 

Good luck!on rear setup but remember your on borrowed time it's only a matter or time before either the ring & pinoion,or the axles develop stress cracks and on day KABOOM!!! start saving for the 9"ford or gm 12 bolt

 

I guess your right.

 

So if set up properly with 26 spline, welded tubes, and 3.73 gears, would an auburn or an eaton be stronger, or does it all come down to just how much the ring and pinion can take? Think a 26, 3.73 auburn can handle 350flywheel HP + 100 NX shot? can should i just ease it out of the hole with out nitrous then spray latter to help the rear end last longer?

 

I have about 500+hp and a 125 hp shot coming right off the line with the auburn on a set of slicks. You should be fine.

 

I have broken two rears (both 4th gens with 28 spline axles); one was in a 6 speed car with 4.10s that was launched hard with stickies (my fault); the other in a STOCK 94Z with an auto and 3.23s. Go figure. Personally, I wouldn't waste any money on a 7 1/2 or 7 5/8 ten bolt...run it til it breaks, but then go with a "real" rearend like a 9" or a 12 bolt. Sure, you can break a 9"; some people can break anything, but you are much less likely to ever have any trouble with a 9" than the weak "Vega rearends" they stuck in our cars originally.Most of the people running them in fast cars have replaced at least a couple; its kind of like saying your buddy's Mustang runs 10s with a stock T5. Sure, its possible, for a while, but most guys who do have a couple spares in reserve...