I have only seen one guy scatter a 10 bolt rear and he was running 9s in his 84ta with nos and slicks. From what he said this was his seciond rear and he has been running in the nines for 4 years on this seciond one he hit seciond gear and it scattered the ring gear. I have listened to people talk about ruining 10 bolts but how many people accually do this. I have a 9 bolt and I am not worried about this but I am wanting to know all that I can about the third gen.

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97 formula w/6speed,cags skipshift eleminator, hurst billet pro shifter, 30#injectors,adjustiable fuel presure regulator,Moroso cold air induction,ported mass air sensor,accell300+ ignition box, accell 9000 wires, bosch platnum4 plugs,flomaster crossflow muffler,Lingenfiter 52mm throttle body,TPIS L98 SuperProfile cam,Crane 1:6 full roller rockers,Edelbrock subframe connectors,Edelbrock strut tower brace.

Other car is a 89 GTA w/700r4w/stage 2 shift kit, corvette servo, B&M mega shifter, TPIS bigmouth intake, TPIS large tube runners, TPIS 52mm throttle body,Edelbrock ported centerbolt heads,LT1 24# injectors,GMPP LT4 hotcam,CompCams Pro magnum roller rockers,Edelbrock headers, flowmaster crossflow muffler,MSD 6A, accell coil, bosch platnum plugs, this car is currently under rebuild and restoration.

 

It sound like he's running big time after market upgrades for the 10 bolt.
I was thinking of going to a 9 bolt myself, but it might be more cost effective to upgrade my 10 bolt instead.

Check out this site. It tells you how.
http://www.isthq.com/~dan/10bolt.html

Ron

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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe

 

I have a stock motor and I slit the pinion in 6 places all around it. I heard it starting to get noisy so I took it to the shop and had them check it out. I was lucky i didn't let it go longer. I sounded like the bearing was gone but I ended up putting a used set of 3.42's in to get me by and they are working alright. I don't think they are long for this world either. I have yet to meet someone that can set up a rearend in one of these things. I need to get out of my little 1 horse town HAHAHAH.

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91 Z28 Camaro
305 TPI
Flowmaster 3" exhaust
700R4 with 2000 Stall and shift kit 3.42 rearend
One sweet sounding system

 

I cracked my original 3.73 10-bolt after the trans rebuild, the carrier had a huge fracture all the way around it which let the pinion loose, and the side/spiders were ground to bits. The 1>2 shift did it at about 5,200rpm It had about 86K miles on it, though. I've got 3.42's now.

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DR Stevens
1984 Trans Am 305HO L69
1991 Firebird 305 L03

 

The reason I ask is I have seen 4th gens run 10s on the stock rear with 4.11:1 gears in them thats why I can't see the rears being that bad I have seen more guys in stangs arround here loose theyr 8.8 more than the gm 10 bolts. Maybe the third gens didn't have the production standards that the 4th gens do with the rear diff.

 

I only have 6 hard passes on my 10 bolt and it's survived so far. A stock rear end isn't expected to survive but a few aftermarket parts to beef it up and it will take a lot more abuse. About the only thing still stock about my diff is the case (not counting the welded axle tubes).

The only reason I don't run a 9 bolt any more is the lack of performance parts. The ones that are available are not worth the extra price.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.69
Best MPH on a time slip: 121.52 altitude corrected to 127.76
Altitude corrected rear wheel HP based on power to weight ratio: 504.5
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley