before it graniaded or not? What was/is done to it, did it have aftermarket axles, posi, sticky tires, just wondering how far i should push this rearend :lol:
What have you put your 7.5" rearend through....
- Thread starter Smokes
- Start date
it's just a matter of time before it breaks. Back in the day I had around 400hp always breaking spider gears in non-posi rear, finally welded the spiders and ended up breaking an axle at the track. Last week my buddy snapped his pinion in his 80's Firebird with a LS1 dropping his driveshaft at the end of his run. All on street tires.
Do it once - do it right. Off the 7.5 while you can still get something for it. Greendragginbu has got one you won't break.
I'm car 211...............
I guess I am 1 of the lucky ones :lol: :lol: 7.5"er, Moser 26 spline axles with ARP studs, 7.625" posi carrier from Monte SS, Richmond 4.11's, Aluminum Girdle, M/T ET Streets,,,,, 1st year out broke the non-posi unit, put in the 7.625 posi lasted 5 years {cracked cone, don't spin posi with drag radials any more}, then put in a G80 posi but gernaded that on the first launch, got another 7.625 posi and all is well for now.............still runnin my same Richmonds from 4 yrs. ago, Last night, Went to our local 1/8th mile tracks, cruise/grudge night and ran 8.11 on a non treated track :lol: :lol:
Oh ya, G80's don't hold up well...............
i put mine through 5 3/4 throttle lauches, and 1 full throttle launch before my wheel and part of my axle passed me around the 60' mark :lol:
A junkyard...
Even with only 20k miles it still wouldn't be worth the effort to install behind my LS6. Heck, it's not worth putting behind a GM crate 350...
Tommy
Even with only 20k miles it still wouldn't be worth the effort to install behind my LS6. Heck, it's not worth putting behind a GM crate 350...
Tommy
350-375+hp 350, 4-speed Saginaw. I've put maybe 2000-3000 miles on the car with the 4-speed, another 3000 at least when it had a Saginaw 3-speed. Haven't broken it yet and while I haven't babied it, I haven't shocked it too hard either. I will be putting new axle seals on and checking tbe axles while it's apart. I have a 2.73 (current is a 2.29... don't knock it, it works with my setup 
) so if the axles look bad I have a spare set.
) so if the axles look bad I have a spare set.
1 day of 13 launches with a clutch on slicks at 3000-4000 (Englishtown). It did not break and is still in use.
http://www.thirdgen.org/techboard/transmissions-drivetrain/397601-bullet-proof-10-bolt.html
This is what this guy did to strengthen his 7.5" 10 bolt from the link above:
• 28 spline 2 series open carrier with a Powertracs Locker
• 7.625” 2.73 gears (numerical lower gears have a larger contact area between the ring and pinion gears)
• Welded axle tubes to housing
• Diff Cover with main cap supports
• 28 spline axles
• Solid pinion spacer (eliminates crush sleeve)
• Extra bracing from the diff cover to the ends of the axle tubes (triangulation)
For drag racing, the 2.73 gears are undesirable, but the mods will strengthen a 7.5" 10 bolt. Is it bulletproof? No.
This is what this guy did to strengthen his 7.5" 10 bolt from the link above:
• 28 spline 2 series open carrier with a Powertracs Locker
• 7.625” 2.73 gears (numerical lower gears have a larger contact area between the ring and pinion gears)
• Welded axle tubes to housing
• Diff Cover with main cap supports
• 28 spline axles
• Solid pinion spacer (eliminates crush sleeve)
• Extra bracing from the diff cover to the ends of the axle tubes (triangulation)
For drag racing, the 2.73 gears are undesirable, but the mods will strengthen a 7.5" 10 bolt. Is it bulletproof? No.
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