OT oldsmobile rear axle interchange question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

O'l Buck · 03-30-2002, 08:53 PM

I just brought home a 72 cutlass 442 that I bought cheap at a junkyard, this thing is very restoreable, but is missing the rear axle housing. The cars I have to pick from for the housing are as follows...81 cutlass supreme brogham, 81 pontiac grand prix, 68 cutlass 4dr, 68 442....I'm hoping any of those rears will bolt under this 72, so I can pick the ratio I want instead of having to buy another, all the axles look the same, and I've heard they will fit, I'm hoping someone on hear knows for sure. Thanks a million.

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'72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

67 Cutlass convertible
330, 3spd stick

90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

imaindianoutlaw · 03-30-2002, 09:46 PM

The 68 cutlass rear is the same as a 442 rear no doubt with out posi. any 68-72 a body rear will work

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Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr

69 longhorn · 03-30-2002, 09:48 PM

68-72 should be fair game.....its been a long time since the Vista Cruiser days! We all know about the 12 bolt olds that wasnt(10 bolt ring). you might look at Chevelle,same era for the 12 bolt that will rock & roll.....69 longhorn.

mooneyes · 03-30-2002, 10:08 PM

YES ALL THOSE REARS WILL FIT BUT I'D STEER AWAY FROM THE 81 CUTLESS AND PONTIAC THERE ONLY 7.5 RING GEAR AND VERY WEAK..BLEW A FEW IN MY DAY

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70 short step from vegas woo hoo !!!Ken Lyons Slippery Rock PA yahoo messenger:mooneyes4b "things always look different from higher up" Clint Eastwood (fist full of dollars)

*Fast68Chevy* · 03-31-2002, 01:22 PM

the camaro guys run 7.5" all day long and never blow them up is whats wierd... no matter the engine they put in.. ive been digging around and have seen that soem of them are running some damn quck times without a hitch(stock rear axle)

alot of the 71 72 G body ran the 8.2" axle I have found, but you can find 8.5" too, on each side of the third memember housing near the left and right rear webbing below the cover youll see two square corners jutting out, those are the 8.5", or if one has a 12 bolt then that will work

maye i can find a pic to show visual diff of 8.2, 7.5, 8.5 axles

kobuzz · 03-31-2002, 01:50 PM

bbs1965 from this board is parting a 442. He is located in DFW Texas.

SCOTI · 03-31-2002, 02:05 PM

Fast...I've got a subscript to GMHi-perf.tech & most of the serious cars in it usually replace the rear w/a stronger one if putting serious power to the ground w/sticky tires. The 10 bolt/8.5" from late 60's to mid 80's can take more abuse than the late 80's & up 7.5"ers can from what I've seen @ the local 1/8 mile track. I guess it depends on the set-up/combination.

mooneyes · 03-31-2002, 07:58 PM

i dont know how there keepin those 7.5 together..had an 81 monte carlo..350, flat tops..solid cam..auto..nothin special..didnt even have sticky tires and could'nt keep those 7.5 together..maybe they got a secret..

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70 short step from vegas woo hoo !!!Ken Lyons Slippery Rock PA yahoo messenger:mooneyes4b "things always look different from higher up" Clint Eastwood (fist full of dollars)

O'l Buck · 03-31-2002, 08:29 PM

i'm not looking to do alot of racing, but I do plan to abuse it just a little....LMAO, I've got a stock 455 4bbl from a 76 delta 88, and a TH 400 to go behind it. I just want to make sure any of these rears will bolt under before I go to the trouble of pulling one, and if it breaks, hey, I've got 3 more LOL

------------------
'72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

67 Cutlass convertible
330, 3spd stick

90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

Duallie · 04-01-2002, 01:42 AM

Any 68-72 chevelle/malibu/skylark/GS/cutlass/442/GTO/montecarlo or tempest axle will bolt in. Chevy seems to run a smaller Ujoint than the others, in my experience. 64-67 will even bolt in, and they're two inches overall narrower for fatter tires.
Try hard not to use the Olds "O" axle, as parts are unobtainable.
General Motors used the 8.2 10bolt through 1970, and phased in the 8.5 in 71, and are still using them in trucks today.

------------------
Just as if I knew what I was doin'

03-30-2002, 08:53 PM	#1
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	OT oldsmobile rear axle interchange question I just brought home a 72 cutlass 442 that I bought cheap at a junkyard, this thing is very restoreable, but is missing the rear axle housing. The cars I have to pick from for the housing are as follows...81 cutlass supreme brogham, 81 pontiac grand prix, 68 cutlass 4dr, 68 442....I'm hoping any of those rears will bolt under this 72, so I can pick the ratio I want instead of having to buy another, all the axles look the same, and I've heard they will fit, I'm hoping someone on hear knows for sure. Thanks a million. ------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

03-30-2002, 09:46 PM	#2
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	The 68 cutlass rear is the same as a 442 rear no doubt with out posi. any 68-72 a body rear will work ------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO 1956 Pontiac 2 dr __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

03-30-2002, 09:48 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	68-72 should be fair game.....its been a long time since the Vista Cruiser days! We all know about the 12 bolt olds that wasnt(10 bolt ring). you might look at Chevelle,same era for the 12 bolt that will rock & roll.....69 longhorn. __________________ http://community.webshots.com/user/hotrodhorn

03-30-2002, 10:08 PM	#4
mooneyes Registered User Join Date: Jan 2002 Location: Slippery Rock PA USA Posts: 1,692	YES ALL THOSE REARS WILL FIT BUT I'D STEER AWAY FROM THE 81 CUTLESS AND PONTIAC THERE ONLY 7.5 RING GEAR AND VERY WEAK..BLEW A FEW IN MY DAY ------------------ 70 short step from vegas woo hoo !!!Ken Lyons Slippery Rock PA yahoo messenger:mooneyes4b "things always look different from higher up" Clint Eastwood (fist full of dollars) __________________ Ken Lyons, Slippery rock pa 68 short step 327 t10 4 gear 72 2wd blazer project 70 lwb 305/700r driver 78 caprice project 02 cavalier D.D ( hate it!!)

03-31-2002, 02:05 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,938	Fast...I've got a subscript to GMHi-perf.tech & most of the serious cars in it usually replace the rear w/a stronger one if putting serious power to the ground w/sticky tires. The 10 bolt/8.5" from late 60's to mid 80's can take more abuse than the late 80's & up 7.5"ers can from what I've seen @ the local 1/8 mile track. I guess it depends on the set-up/combination. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

03-31-2002, 01:22 PM	#5
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	the camaro guys run 7.5" all day long and never blow them up is whats wierd... no matter the engine they put in.. ive been digging around and have seen that soem of them are running some damn quck times without a hitch(stock rear axle) alot of the 71 72 G body ran the 8.2" axle I have found, but you can find 8.5" too, on each side of the third memember housing near the left and right rear webbing below the cover youll see two square corners jutting out, those are the 8.5", or if one has a 12 bolt then that will work maye i can find a pic to show visual diff of 8.2, 7.5, 8.5 axles

03-31-2002, 01:50 PM	#6
kobuzz Parts Whore Join Date: Nov 2001 Location: lockdown cell #1465 Posts: 105	bbs1965 from this board is parting a 442. He is located in DFW Texas.

03-31-2002, 07:58 PM	#8
mooneyes Registered User Join Date: Jan 2002 Location: Slippery Rock PA USA Posts: 1,692	i dont know how there keepin those 7.5 together..had an 81 monte carlo..350, flat tops..solid cam..auto..nothin special..didnt even have sticky tires and could'nt keep those 7.5 together..maybe they got a secret.. ------------------ 70 short step from vegas woo hoo !!!Ken Lyons Slippery Rock PA yahoo messenger:mooneyes4b "things always look different from higher up" Clint Eastwood (fist full of dollars) __________________ Ken Lyons, Slippery rock pa 68 short step 327 t10 4 gear 72 2wd blazer project 70 lwb 305/700r driver 78 caprice project 02 cavalier D.D ( hate it!!)

03-31-2002, 08:29 PM	#9
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	i'm not looking to do alot of racing, but I do plan to abuse it just a little....LMAO, I've got a stock 455 4bbl from a 76 delta 88, and a TH 400 to go behind it. I just want to make sure any of these rears will bolt under before I go to the trouble of pulling one, and if it breaks, hey, I've got 3 more LOL ------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

04-01-2002, 01:42 AM	#10
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	Any 68-72 chevelle/malibu/skylark/GS/cutlass/442/GTO/montecarlo or tempest axle will bolt in. Chevy seems to run a smaller Ujoint than the others, in my experience. 64-67 will even bolt in, and they're two inches overall narrower for fatter tires. Try hard not to use the Olds "O" axle, as parts are unobtainable. General Motors used the 8.2 10bolt through 1970, and phased in the 8.5 in 71, and are still using them in trucks today. ------------------ Just as if I knew what I was doin' __________________ Just as if I knew what I was doin'



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