BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
HomeHome  RegisterRegister  Log in  
Log in
Username:
Password:
Log in automatically: 
:: I forgot my password
Who is online?
In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None

Most users ever online was 132 on Wed Oct 04, 2017 3:26 pm
Latest topics
» Pictures from the 2017 Roundup
Wed Oct 18, 2017 9:00 pm by Big Wagon Guy

» Brake line size help
Sun Oct 15, 2017 9:08 pm by 1984twodoor

» Surprise Surprise!
Sun Oct 15, 2017 8:17 pm by Big Wagon Guy

» 1980 Coupe De Ville
Sat Oct 14, 2017 8:55 pm by IMPALADAKID

» 2017 10th Annual Roundup, List of Attendees
Sat Oct 14, 2017 8:42 am by Big Wagon Guy

» Frame
Fri Oct 13, 2017 10:26 pm by MASShole9C1

» Random parts for sale
Fri Oct 13, 2017 1:46 pm by sdstick

» Tires needed
Fri Oct 06, 2017 9:29 pm by silverfox103

» Heater/AC Panel for 1987 - 1990 Caprice Classic Brougham
Tue Oct 03, 2017 10:10 pm by MASShole9C1

Search
 
 

Display results as :
 
Rechercher Advanced Search
October 2017
MonTueWedThuFriSatSun
      1
2345678
9101112131415
16171819202122
23242526272829
3031     
CalendarCalendar

Share | 
 

 Question on 7.5 vs 8.5 differential

View previous topic View next topic Go down 
AuthorMessage
Ironfistdog

avatar

Posts : 2124
Join date : 2011-01-11
Age : 36
Location : Warren, MA

PostSubject: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 8:33 am

I need to know specifically what the difference is (if any) between the yoke's that hang out of the differential 7.5" bs 8.5".
Are the bolts that hold the u-joints to the yoke spaced the same between 7.5 vs 8.5?
Anyone have a 7.5" and can take a measurement for me?
Back to top Go down
V8Killer

avatar

Posts : 1691
Join date : 2009-03-12
Age : 46
Location : Southern, NH

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 9:06 am

Ironfistdog wrote:
I need to know specifically what the difference is (if any) between the yoke's that hang out of the differential 7.5" bs 8.5".
Are the bolts that hold the u-joints to the yoke spaced the same between 7.5 vs 8.5?
Anyone have a 7.5" and can take a measurement for me?
Well I'll tell you what I know and hope that answers everything.

7.5 & 8.5 diff's have the same internal snap-ring 3R u-joints, straps, and bolts.

On a b-body the 7.5 driveshaft in at least an inch longer

I think the only difference in the yoke itself is the size of the splined hole where the pinion goes thru (but may actually be the same)
Back to top Go down
sdstick

avatar

Posts : 4287
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 9:17 am

Thought there was a 27 vs 30 teeth thing going on too?

Not that that matters for Indys question....

I saw it in the parts book onetime....91-96...drums...disc....depending on code


_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
Back to top Go down
Ironfistdog

avatar

Posts : 2124
Join date : 2011-01-11
Age : 36
Location : Warren, MA

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 9:27 am

So if I buy a 40 tooth reluctor that bolts to a 7.5" differential yoke, it should also bolt to an 8.5" yoke?
(it uses the 4 bolts that attach the drive shaft to the rear end)
Back to top Go down
sdstick

avatar

Posts : 4287
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 10:29 am

I'd wait until someone with a 7.5 in hand chimes in

Brophys always around & we know his 7.5 is accessible right?

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
Back to top Go down
V8Killer

avatar

Posts : 1691
Join date : 2009-03-12
Age : 46
Location : Southern, NH

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 10:30 am

sdstick wrote:
Thought there was a 27 vs 30 teeth thing going on too?

Not that that matters for Indys question....

I saw it in the parts book onetime....91-96...drums...disc....depending on code

Around '90 the 8.5 went from 28 spline axles to 30 spline (stronger)

10 bolt cover with 8.5" ring gear. Ring gear has 10 bolts and pinion has 30 spline. C/clip rear could have 28 or 30 spline axles. Sometimes referred to as the "GM 10-bolt".
Back to top Go down
V8Killer

avatar

Posts : 1691
Join date : 2009-03-12
Age : 46
Location : Southern, NH

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 10:32 am

Ironfistdog wrote:
So if I buy a 40 tooth reluctor that bolts to a 7.5" differential yoke, it should also bolt to an 8.5" yoke?
(it uses the 4 bolts that attach the drive shaft to the rear end)
.
.
I'd have no reason to think it wouldn't work Smile 
Back to top Go down
No Moa

avatar

Posts : 3889
Join date : 2009-02-21
Age : 45
Location : Midcoast Maine

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 4:55 pm

I've got a couple 7.5, didn't read the thread, but who needs one? Lol
Back to top Go down
http://www.collectorfbody.com
Ironfistdog

avatar

Posts : 2124
Join date : 2011-01-11
Age : 36
Location : Warren, MA

PostSubject: Re: Question on 7.5 vs 8.5 differential   Wed Sep 11, 2013 7:45 pm

I just need to know if the measurement from bolt hole to bolt hole is the same on a 7.5" as it is on an 8.5"
Both across the u-joint straps (parallel) and across from strap to strap (perpendicular).
Back to top Go down
1984twodoor

avatar

Posts : 4066
Join date : 2010-03-30
Age : 24
Location : Wilmington/Wakefield/Andover

PostSubject: Re: Question on 7.5 vs 8.5 differential   Thu Sep 12, 2013 12:11 am

Ironfistdog wrote:
I just need to know if the measurement from bolt hole to bolt hole is the same on a 7.5" as it is on an 8.5"
Both across the u-joint straps (parallel) and across from strap to strap (perpendicular).
Get it to you tomorrow, either early as hell or late at night.
Back to top Go down
Sponsored content




PostSubject: Re: Question on 7.5 vs 8.5 differential   

Back to top Go down
 
Question on 7.5 vs 8.5 differential
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» Question About Gladiator beasts.
» Dark Fusion / Mirror Force question
» Question about Reinforce Truth
» gear differential putty
» Question on scrap dragon

Permissions in this forum:You cannot reply to topics in this forum
BADASS of New England :: 91-96 B & D-body tech :: Problems / Maintenance-
Jump to: