8.5" GM Ten Bolt

bobby · 11-18-2008, 09:23 AM

I have a 8.5 out of a 73 Cutlass that I cut down to fit my 68 Firebird. These have factory press on bearings. No c-clips. I think that most 73-77 cutlasses and regals had this type of rear end. So if you are cutting, go with one of these and eliminate the c-clip eliminators and bastardizing (new word of the day) the rearend.

CrateCamaro · 11-18-2008, 06:42 PM

Quote:

Originally Posted by bobby

I have a 8.5 out of a 73 Cutlass that I cut down to fit my 68 Firebird. These have factory press on bearings. No c-clips. I think that most 73-77 cutlasses and regals had this type of rear end. So if you are cutting, go with one of these and eliminate the c-clip eliminators and bastardizing (new word of the day) the rearend.

U sure thats the same diff as the GM 8.5? The only rear that I know of that had pressed on bearings was a BOP 8.2. I know theres a difference for sure and parts availability is nill.

greg fulk · 11-19-2008, 02:38 AM

the 8.2 died in 71...a 71 nova could have either an 82. or 8.5. Tod where you located? I have an 8.5 housing out of a 73 nova that will fit. if ya live close to Ohio I'll take $20 bucks for it...I think I have the axles too.

Jesse Knapp · 06-03-2009, 08:45 PM

Quote:

Originally Posted by greg fulk

the 8.2 died in 71...a 71 nova could have either an 82. or 8.5. Tod where you located? I have an 8.5 housing out of a 73 nova that will fit. if ya live close to Ohio I'll take $20 bucks for it...I think I have the axles too.

I have a 71 Nova with a 10 bolt. What do I look for to know if I have the large or small one? Is it maybe ring gear diameter? I knew this a long time ago but can't remember now. My thoughts were to just buy a complete 12 bolt from Strange, but it sounds like the big 10 bolt is plenty stout. Car came with a 307 and a glide. Still has the glide in it. I'm betting it's the small one.

Jesse Knapp · 06-04-2009, 07:41 AM

I have a horrible memory! I just this morning remember something about the ring gear bolts are larger on the 8.5. Is this how one tells and, if so, what is the size comparison?

skooter · 06-04-2009, 08:45 AM

http://www.novaresource.org/axle.htm

bobby · 06-04-2009, 09:06 AM

Quote:

Originally Posted by Jesse Knapp

I have a horrible memory! I just this morning remember something about the ring gear bolts are larger on the 8.5. Is this how one tells and, if so, what is the size comparison?

Not sure about the 8.2, but the 8.5 has 7/16 bolts. The 12 bolt has 3/8 bolts.

Dont' worry about the memory, you probably forgot more than most people will ever know.

Jesse Knapp · 06-04-2009, 03:53 PM

I am almost sure the ring gear bolts are larger on the 8.5. Thanks for posting the website address.

bobby · 11-19-2008, 08:27 AM

Quote:

Originally Posted by CrateCamaro

U sure thats the same diff as the GM 8.5? The only rear that I know of that had pressed on bearings was a BOP 8.2. I know theres a difference for sure and parts availability is nill.

YES, it is. the only difference is that they have press on axle bearings. I have put 77 Camaro guts inside of one, if that says anything.

Nitroman · 05-30-2009, 09:22 AM

Does this particular diff have provisions for a torque arm ?? And do you still have it ?

11-18-2008, 09:23 AM	#1
bobby Member Join Date: Jun 2008 Location: League City, Texas Posts: 243 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5" GM Ten Bolt I have a 8.5 out of a 73 Cutlass that I cut down to fit my 68 Firebird. These have factory press on bearings. No c-clips. I think that most 73-77 cutlasses and regals had this type of rear end. So if you are cutting, go with one of these and eliminate the c-clip eliminators and bastardizing (new word of the day) the rearend. __________________ Next time wave all of your fingers at me.

11-19-2008, 02:38 AM	#3
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: 8.5" GM Ten Bolt the 8.2 died in 71...a 71 nova could have either an 82. or 8.5. Tod where you located? I have an 8.5 housing out of a 73 nova that will fit. if ya live close to Ohio I'll take $20 bucks for it...I think I have the axles too. __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

06-04-2009, 07:41 AM	#5
Jesse Knapp Member Join Date: Jan 2002 Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5" GM Ten Bolt I have a horrible memory! I just this morning remember something about the ring gear bolts are larger on the 8.5. Is this how one tells and, if so, what is the size comparison? __________________ Jesse Knapp 4899 STK, SS

06-04-2009, 08:45 AM	#6
skooter Junior Member Join Date: Dec 2002 Posts: 33 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5" GM Ten Bolt http://www.novaresource.org/axle.htm

06-04-2009, 03:53 PM	#8
Jesse Knapp Member Join Date: Jan 2002 Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5" GM Ten Bolt I am almost sure the ring gear bolts are larger on the 8.5. Thanks for posting the website address. __________________ Jesse Knapp 4899 STK, SS

05-30-2009, 09:22 AM	#10
Nitroman Junior Member Join Date: May 2009 Location: Boonville, IN Posts: 21 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5" GM Ten Bolt Does this particular diff have provisions for a torque arm ?? And do you still have it ?