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#1
12-01-2009, 11:15 PM
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10 Bolt 8.2 Rear OK for Street Use with 455?
I have been running a 10-bolt BOP axle in my car for a number of years. It was upgraded with an Auburn Pro Posi unit and Richmond 3.55 gears about 8-9 years back. Since then, I put a 455 in the car and a Tremec 5-speed. Car does not see any track time, just some hot rodding on the street and an occasional launch from a stop sign. I am upgrading the brakes and going to 10" tires this winter and just wondering, with limited traction, will this thing survive just fine? I know that there are a lot out there that say you need to go to a 12-bolt or a 9" but just wondering how many of these survive under the conditions as stated??? Thanks.
__________________
Skinned knuckles and empty wallet! Could I be any happier? 66 GTO Convertible. LS3-525 HP. Legend LGT700 5-speed, Wilwood 4-wheel disc brakes, Ridetech coil over front susp, PMT rear susp, Hotchkis bars, Billet Specialties 18" Dagger's (18X9 rear, 18X8 front). 2002 Ram Air WS.6 convertible Trans Am. Wife's car. |
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#2
12-01-2009, 11:19 PM
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I think you will be fine on street tires. The real problems start if you hook it. Wouldn't do any 5k clutch drops, but why bother? W/the 455 I'm sure it will smoke them just fine by easing it out at 3k.
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#3
12-01-2009, 11:20 PM
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Some do, some don't.
Gettting traction will probably kill it. |
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#4
12-02-2009, 12:06 AM
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I was thinking about looking for a 12-bolt but not sure what will be the same dimensions and what will bolt up in the stock location??? Thoughts?
__________________
Skinned knuckles and empty wallet! Could I be any happier? 66 GTO Convertible. LS3-525 HP. Legend LGT700 5-speed, Wilwood 4-wheel disc brakes, Ridetech coil over front susp, PMT rear susp, Hotchkis bars, Billet Specialties 18" Dagger's (18X9 rear, 18X8 front). 2002 Ram Air WS.6 convertible Trans Am. Wife's car. |
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#5
12-02-2009, 12:18 AM
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Go easy on the clutch and use street tires and it should hold up fine. High RPM clutch drops and sticky tires will kill it quickly.
I think that A-body 12 bolts up to '67 will be the same width as your original rear. After that they're a little wider but only about 1/2" per side. Most common wheel/tire combos will still fit.
__________________
1966 GTO 1969 Lemans Convertible- F.A.S.T. legal family cruiser. 12.59 on G70-14 Polyglas tires. 1.78 60' 1969 Bonneville Safari- cross country family cruiser. . 1979 Trans Am 400, 4-speed, 4 wheel disc. View from the drivers seat racing down Atco Raceway- http://www.youtube.com/watch?v=GhYDMdOEC7A Ride along in the other lane-http://www.youtube.com/watch?v=mIzgpLtF_uw |
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#6
12-02-2009, 12:21 AM
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Your 10 bolt will be fine....If you do switch to a 12 bolt your anti sway bar will require mods....otherwise it should bolt in fine.....I have a 10 bolt in my Judge and have just put in a 455 and am not contemplating a change. I ran a 10 bolt in a 3600 lb GTO to 11.00 without any issues....
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24 beer in a case. 24 Hours in a day. Coincidence? I think not. " Steve Wright" |
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#7
12-02-2009, 12:22 AM
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Actually, the rear is out of a 68...Still BOP. Is the magic year 1972 before all changes for the width and fit of a 12-bolt?
__________________
Skinned knuckles and empty wallet! Could I be any happier? 66 GTO Convertible. LS3-525 HP. Legend LGT700 5-speed, Wilwood 4-wheel disc brakes, Ridetech coil over front susp, PMT rear susp, Hotchkis bars, Billet Specialties 18" Dagger's (18X9 rear, 18X8 front). 2002 Ram Air WS.6 convertible Trans Am. Wife's car. |
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#8
12-02-2009, 12:25 AM
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Get one of the 8.5 Olds/Buick 10-bolts, nearly as strong as a 12-bolt and they come with some better features. They bolt right in, at the most you'll need to shorten the driveshaft a tad and change the rear U-joint. It will be same width as your '68 BOP rear.
 The stock 28-spline axles are true heavy-duty units and the stock posi is fine as long as you're not drag racing with slicks. The axles are also a tapered-bearing design that bolt-in, no C-clips like a 12-bolt has so no C-clip eliminator needed. I have one in my Tempest with 3.42 gears, but I got a little spendy and upgraded to an Eaton posi and Moser 30-spline axles. Here's nice one for sale, from the same fellow that did mine for me: http://forums.maxperformanceinc.com/...d.php?t=617520 |
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#9
12-02-2009, 12:34 AM
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Just curious - what did these come out of? I have a wilwood rear disc brake setup for my BOP and wondering what is going to interchange with something like this?
__________________
Skinned knuckles and empty wallet! Could I be any happier? 66 GTO Convertible. LS3-525 HP. Legend LGT700 5-speed, Wilwood 4-wheel disc brakes, Ridetech coil over front susp, PMT rear susp, Hotchkis bars, Billet Specialties 18" Dagger's (18X9 rear, 18X8 front). 2002 Ram Air WS.6 convertible Trans Am. Wife's car. |
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#10
12-02-2009, 12:45 AM
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They come out of the '71 -'72 Olds 442/Cutlass and Buick GS/Skylark.
I have a disc brake kit made for this rear, contact the guy who sold you your stuff or talk to Tobin at KORE3 who probably knows more about aftermarket brake kits than just about anyone: http://www.kore3.com/index.php |
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#11
12-02-2009, 01:11 AM
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Been running an 8.2 BOP in my son's Bird mid 12's at the track with M/T et streets with no problems so far.
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#12
12-02-2009, 08:09 AM
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Well, I did some measurements on my rear axle and the Wilwood brakes will not fit. Axle flange measurements are way off.
__________________
Skinned knuckles and empty wallet! Could I be any happier? 66 GTO Convertible. LS3-525 HP. Legend LGT700 5-speed, Wilwood 4-wheel disc brakes, Ridetech coil over front susp, PMT rear susp, Hotchkis bars, Billet Specialties 18" Dagger's (18X9 rear, 18X8 front). 2002 Ram Air WS.6 convertible Trans Am. Wife's car. |
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#13
12-02-2009, 10:31 AM
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Quote:
I have 8.5 3.42's in both my cars. Great rear end and cheap to build. I've had good success locating the housings as well. Nobody wants 'em cause they are not a 12 bolt...  I just picked up a spare for $50......
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************************************* 1968 Lemans. 37,000 original miles. GTO clone. 462ci/KRE 290 heads. UltraDyne 280/288 Solid/850 Qjet by Cliff/Performer RPM/TSP 9.5" in TH400/8.5" 3.42 gears/3950# Race weight/12.58@106 at Bandimere speedway high altitude |
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#14
12-02-2009, 10:34 AM
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Quote:
__________________
63 Catalina coupe 467 cid budget drag car 11's 1/4 , 7.3 1/8th pump gas n/a 66 Star Chief Executive 57k mile 69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4 69 Firebird 400 Burgandy/Black 70 Olds Rallye 350 F85 4 speed 3.91's 70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455 74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8 2020 RAM 1500 SLT 4x4 5.7 A8 Hemi 2007 Hummer H3 3.7 liter turd 2019 Chevy Spark petrol car 38 mpg |
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#15
12-02-2009, 10:43 AM
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What do the FAST guys do to their 8.2's to make them hold up to that abuse?
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#16
12-02-2009, 10:56 AM
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um, 70 455HO GTO's came with 12 bolts from the factory
a guy I know had one of those rears for sale about a year ago. believe I even posted it here on PY in the parts for sale section
__________________
http://gloryrestoparts.20megsfree.com/ 1970.5 Pontiac Tempest GT-37 400ci 4bbl 4sp 3.90:1 12.73 @ 112.42 2011 Pure Stock Drags 12.71 @ 110.58 2013 Martin FAST/FS race 12.70 @ 111.74 2014 Pure Stock Drags 12.60 @ 111.66 2015 Martin FAST/FS race 1968 Pontiac Firebird 400 TH400/3.08 open export car - factory heater delete 14.48 @ 95.86 w/ 2.14 60' 2018 Pure Stock Drags 14.47 @ 95.02 w/ 2.16 60' 2019 Martin FAST/FS race |
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#17
12-02-2009, 01:36 PM
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Quote:
__________________
63 Catalina coupe 467 cid budget drag car 11's 1/4 , 7.3 1/8th pump gas n/a 66 Star Chief Executive 57k mile 69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4 69 Firebird 400 Burgandy/Black 70 Olds Rallye 350 F85 4 speed 3.91's 70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455 74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8 2020 RAM 1500 SLT 4x4 5.7 A8 Hemi 2007 Hummer H3 3.7 liter turd 2019 Chevy Spark petrol car 38 mpg |
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#18
12-02-2009, 01:41 PM
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Quote:
__________________
63 Catalina coupe 467 cid budget drag car 11's 1/4 , 7.3 1/8th pump gas n/a 66 Star Chief Executive 57k mile 69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4 69 Firebird 400 Burgandy/Black 70 Olds Rallye 350 F85 4 speed 3.91's 70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455 74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8 2020 RAM 1500 SLT 4x4 5.7 A8 Hemi 2007 Hummer H3 3.7 liter turd 2019 Chevy Spark petrol car 38 mpg |
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#19
12-02-2009, 03:59 PM
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Never had any luck keeping an 8.2 rear together on cars running in the 12's-and these were all automatics!!! I've found that good traction generally means and end to the 8.2 rear!!!
__________________
My money talks to me-it usually says goodbye! |
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#20
12-02-2009, 04:14 PM
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Quote:
__________________
1966 GTO 1969 Lemans Convertible- F.A.S.T. legal family cruiser. 12.59 on G70-14 Polyglas tires. 1.78 60' 1969 Bonneville Safari- cross country family cruiser. . 1979 Trans Am 400, 4-speed, 4 wheel disc. View from the drivers seat racing down Atco Raceway- http://www.youtube.com/watch?v=GhYDMdOEC7A Ride along in the other lane-http://www.youtube.com/watch?v=mIzgpLtF_uw |
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