home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 11-14-2008, 01:45 AM   #1
qwkswede
Old and Slow
 
Join Date: Mar 2003
Location: Denver, CO
Default Rear axle choices Ford 9" or 8.8" or other? (2008-2022 bump)

I am about to start hunting junkyards for an axle to use in a high powered volvo. It is going to be a solid axle, no IRS because the car will go faster than 10.99 hopefully, and IRS isn't allowed after a certain point. 10.99 comes to mind as the cutoff for IRS cars, its been a while though.

In my normal cheap style, I'll just crawl the junkyards for most of the parts, then do the fab work myself to make it work in a Volvo. It will likely need shortining, and the brackets welded on, tubbing the rear for some big rubber. Thats the plan.

I'm thinking Ford 9" as the defacto strong rear end with tons of aftermarket support and a removable center section differential carrier assembly.

But I know that alot of newer cars that im likely to find in the junkyard are now Ford 8.8 rears. And there is some support for these in the aftermarket because they are in Mustangs.

Any thoughts on where I should hunt for the ideal rear axle to start this project moving along?
qwkswede is offline   Reply With Quote
Old 11-14-2008, 02:07 AM   #2
FlyingTog
B6304 douche
 
FlyingTog's Avatar
 
Join Date: Aug 2007
Location: Cape May County, New Jersey
Default

I'd say get a 9" out of an older Ford truck (late 70's-early 80's F Series or bronco, plentiful in yards) for the housing and just get an aftermarket center section from some performance company. Easiest, and maybe the cheapest... That's what I'd do, anyway. I'm all for easy.


Pete.

Edit: P.S. Teh Volvovette has a 9" under it, iirc.
__________________
Quote:
Originally Posted by Crazychopstick View Post
Just a 960 bumper returning to its original form.
97 965R M90 My car! It's Purple! 267K+! 15.66@89.14
83 Group A 242. 7k+ original miles. Long term project.
98 V90 Parts car. Olive Green. 197K+
98 V90 Parts car. Tropical Green. 177K+
59 Austin Healey Bugeye Sprite. Project car.
94 Miata. Weekend car with 66K+ original miles!
94 Miata. LeMons project.

960 build thread: http://forums.turbobricks.com/showthread.php?t=231763

Last edited by FlyingTog; 11-14-2008 at 03:14 AM..
FlyingTog is offline   Reply With Quote
Old 11-14-2008, 02:56 AM   #3
Obeharskad122s
Board Member
 
Obeharskad122s's Avatar
 
Join Date: Nov 2002
Location: Santa Rosa, Ca.
Default

I'd get an 8.8 out of a lincoln or out of a ford explorer, fab it in, replace the guts with baller status ones when/if they esplode. The 9" is HEAVY.

There's lots of support for the 8.8.
__________________
-Isaiah

Last edited by Obeharskad122s; 11-14-2008 at 03:06 AM..
Obeharskad122s is offline   Reply With Quote
Old 11-14-2008, 03:28 AM   #4
RvolvoR
Board Member
 
Join Date: Jun 2003
Location: PDX
Default

remember, the 8.8 came in a lot of stuff...exploder, crown vic, ranger, f150
RvolvoR is offline   Reply With Quote
Old 11-14-2008, 05:32 AM   #5
740ATL
Guest
 
Default

Kevin Hawkinson and JV are using the Toyota rear. I'd love to see more pics of their progress. (hint hint).
  Reply With Quote
Old 11-14-2008, 05:43 AM   #6
fryea
Board Member
 
fryea's Avatar
 
Join Date: Mar 2005
Location: Tacoma, WA
Default

Quote:
Originally Posted by 740ATL View Post
Kevin Hawkinson and JV are using the Toyota rear. I'd love to see more pics of their progress. (hint hint).
+1

The toyota supra with 5 bolt wheels comes standard with an awesome diff that is:
1.) light
2.) strong
3.) already has a LSD
fryea is offline   Reply With Quote
Old 11-14-2008, 05:45 AM   #7
BB-Q
(. )( .)
 
BB-Q's Avatar
 
Join Date: May 2005
Location: Costa del Fylde
Default

The 8.8" would be my vote if you are planning on making less than around 700ftlb of torque on drag tyres.

Get a later one out of a truck and you'll be good to go. Make sure it's a 31 spline axle. The Explorer one comes with discs from 97 on and has an LSD as standard. You can't fit C clip eliminators though (if that bothers you- it doesn't me). Carbon diff clutch plates are around £100 on Ebay and Moser do custom length shafts if you need them.

You should find the 8.8" much cheaper to build than the 9" because you haven't got to buy a rear disc set up or an LSD. Plus it only weighs about 20-30lb more than the Volvo axle.

Leave the 9" for the V8 guys- they have bigger budgets than us!
__________________

Quote:
Originally Posted by foggyjames View Post
The man is a pimp, and a fast one at that...
Quote:
Originally Posted by frpe82 View Post
He's got that "crazy Mark" look in his eyes...........
1992 245 SE B200F, M47, Low and painfully slow.......

v8volvo240.com
BB-Q is offline   Reply With Quote
Old 11-14-2008, 05:50 AM   #8
Poik
Backwards Turbo
 
Poik's Avatar
 
Join Date: Feb 2005
Location: Göteborg, Sweden
Default

Quote:
Originally Posted by fryea View Post
+1

The toyota supra with 5 bolt wheels comes standard with an awesome diff that is:
1.) light
2.) strong
3.) already has a LSD
I thought Supras were IRS.
__________________


Eric Olsson's 242 Turbo | 245 DL | 744 Turbo
Poik is offline   Reply With Quote
Old 11-14-2008, 07:50 AM   #9
linuxman51
BRANDSCHUTZVORSCHRIFTEN!
 
linuxman51's Avatar
 
Join Date: Dec 2002
Location: mont, AL
Default

Quote:
Originally Posted by Poik View Post
I thought Supras were IRS.
they are.
__________________
"They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy"

Now with in-house Dyno tuning!

Megasquirt Tuning!
linuxman51 is offline   Reply With Quote
Old 11-14-2008, 08:33 AM   #10
Lord Tentacle
Anime Lord
 
Lord Tentacle's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUS/Appleton, WI
Default

fidel sells 27 spline shafts to drop into the volvo rear end that will support 700+ ft-lbs
(simply better metal than volvo used from the factory)
($380ish per set)
combine this with a good solid center diff and the reasons to go away from the volvo unit fade quite quickly
the volvo tubes are thicker than on an 8.8 anyways
__________________
Quote:
Originally Posted by .:Sven:. View Post
Your not getting naked pics of my GF, and im getting a 3inch. Its settled
Tentacle Wagon-91 940; stuff including paddles and Holset etc... powered by Corn
Tentacle Truck-98 Ram 2500 v10; stuff including viper bits, 4wd delete, and 10,000lb trailer

recently crushed Volvo's
03 C70, 96 850, 02 v70, 90 244, 98 v70, 99 v70
Lord Tentacle is offline   Reply With Quote
Old 11-14-2008, 08:52 AM   #11
pwschuh
Rolling...
 
Join Date: Jul 2003
Location: Mid-Atlantic
Default

Quote:
Originally Posted by Lord Tentacle View Post
combine this with a good solid center diff and the reasons to go away from the volvo unit fade quite quickly
What good solid center diff are we refering to here? I thought that the folks who were killing the Volvo axles were breaking the spider gears and whatnot.
__________________
"No man would listen to you talk if he didn't know it was his turn next." E. W. Howe
pwschuh is offline   Reply With Quote
Old 11-14-2008, 10:55 AM   #12
qwkswede
Old and Slow
 
Join Date: Mar 2003
Location: Denver, CO
Default

Quote:
Originally Posted by FlyingTog View Post
I'd say get a 9" out of an older Ford truck (late 70's-early 80's F Series or bronco, plentiful in yards) for the housing and just get an aftermarket center section from some performance company. Easiest, and maybe the cheapest... That's what I'd do, anyway. I'm all for easy.


Pete.

Edit: P.S. Teh Volvovette has a 9" under it, iirc.
NO, I'm pretty sure Dug did an 8,8". 9" diffs don't have that removeable rear cover, and the differential unbolts and comes out the front as a single unit. See if this picture comes through --v
qwkswede is offline   Reply With Quote
Old 11-14-2008, 10:58 AM   #13
qwkswede
Old and Slow
 
Join Date: Mar 2003
Location: Denver, CO
Default

Spider gears are a weakness in the open diffs. Axles are a weakness on all of them. 27 spline is a pretty dinky axle to put major torque through. Especially on slicks.
I know that my eaton locker diff in the 740 seems to be much stronger than the couple of open diffs I destroyed.

Quote:
Originally Posted by pwschuh View Post
What good solid center diff are we refering to here? I thought that the folks who were killing the Volvo axles were breaking the spider gears and whatnot.
qwkswede is offline   Reply With Quote
Old 11-14-2008, 12:27 PM   #14
BB-Q
(. )( .)
 
BB-Q's Avatar
 
Join Date: May 2005
Location: Costa del Fylde
Default

Quote:
Originally Posted by Lord Tentacle View Post
fidel sells 27 spline shafts to drop into the volvo rear end that will support 700+ ft-lbs
(simply better metal than volvo used from the factory)
($380ish per set)
combine this with a good solid center diff and the reasons to go away from the volvo unit fade quite quickly
the volvo tubes are thicker than on an 8.8 anyways
You serious? Have you actually cut an axle in half to check?

Because the axle tubes on my 8.8" were 1/4" thick steel. I've got pictures too, if you want them.

EDIT:

Now with pics:

8.8" and 1041 side by side:


8.8" axle tube:


Spindly 31 spline shafts:
BB-Q is offline   Reply With Quote
Old 11-14-2008, 12:46 PM   #15
Mueller
Board Member
 
Mueller's Avatar
 
Join Date: Oct 2004
Location: Antioch, CA
Default

Quote:
Originally Posted by BB-Q View Post
You serious? Have you actually cut an axle in half to check?

Because the axle tubes on my 8.8" were 1/4" thick steel. I've got pictures too, if you want them.

EDIT:

Now with pics:

8.8" and 1041 side by side:
8.8" axle tubes come in a few different thickness ranges from what I read...the thicker the higher rating for vehicle weight, important for a pickup/suv, not so important on our cars...overkill and why have that extra weight??? no one is breaking the housing assemblies that I know of
__________________
.........
Mueller is offline   Reply With Quote
Old 11-14-2008, 12:47 PM   #16
thelostartof
unbalanced chemical
 
thelostartof's Avatar
 
Join Date: Jun 2002
Location: Apache Junction, AZ
Default

Quote:
Originally Posted by qwkswede View Post
I am about to start hunting junkyards for an axle to use in a high powered volvo. It is going to be a solid axle, no IRS because the car will go faster than 10.99 hopefully, and IRS isn't allowed after a certain point. 10.99 comes to mind as the cutoff for IRS cars, its been a while though.
Uh there are factory IRS cars going faster than 10.99 ...

There is no cut off for IRS last time I checked
__________________
Chip Feedback Thread / PM LH 2.4 Chip Prices
thelostartof is offline   Reply With Quote
Old 11-14-2008, 12:49 PM   #17
Mueller
Board Member
 
Mueller's Avatar
 
Join Date: Oct 2004
Location: Antioch, CA
Default

Quote:
Originally Posted by pwschuh View Post
What good solid center diff are we refering to here? I thought that the folks who were killing the Volvo axles were breaking the spider gears and whatnot.
those are people too cheap to install a new differential, they are using open diffs or welding the parts together...

a new diff will replace the factory spider gears...

I like the idea of new replacment axles with stronger material for the stock rear ends...this option gets expensive, however, no cutting or welding which is appealing...
Mueller is offline   Reply With Quote
Old 11-14-2008, 12:51 PM   #18
Geoff240Ti
Board Member
 
Geoff240Ti's Avatar
 
Join Date: Nov 2002
Location: Estevan, Sask Canada
Default

Quote:
Originally Posted by thelostartof View Post
Uh there are factory IRS cars going faster than 10.99 ...

There is no cut off for IRS last time I checked
Defintely not, no worries there.
__________________
Geoff
Geoff240Ti is offline   Reply With Quote
Old 11-14-2008, 12:51 PM   #19
Karl Buchka
Board Member
 
Join Date: Mar 2007
Location: Los Angeles
Default

Quote:
Originally Posted by BB-Q View Post
The 8.8" would be my vote if you are planning on making less than around 700ftlb of torque on drag tyres.

Get a later one out of a truck and you'll be good to go. Make sure it's a 31 spline axle. The Explorer one comes with discs from 97 on and has an LSD as standard. You can't fit C clip eliminators though (if that bothers you- it doesn't me). Carbon diff clutch plates are around £100 on Ebay and Moser do custom length shafts if you need them.

You should find the 8.8" much cheaper to build than the 9" because you haven't got to buy a rear disc set up or an LSD. Plus it only weighs about 20-30lb more than the Volvo axle.

Leave the 9" for the V8 guys- they have bigger budgets than us!
If you have disc brakes already, why would you even need c-clip eliminators?
Karl Buchka is offline   Reply With Quote
Old 11-14-2008, 12:56 PM   #20
Captain Bondo
Exklusiv Zubehör Klub
 
Captain Bondo's Avatar
 
Join Date: Sep 2002
Default

Quote:
Originally Posted by Karl Buchka View Post
If you have disc brakes already, why would you even need c-clip eliminators?
Yeah I end up trying to eplxain that to people every now and again. C-Clip eliminators are completely redundant if you have disc brakes. For the wheel to fly off in the event of a broken axle you'd need to tear the caliper right off the bracket.

C-clip eliminators were a big deal with rear drums and that's it.
__________________


-Kenny
(I crushed a 240 with some stuff done to it. Honest.)
Quote:
Originally Posted by Jordan View Post
Turbobricks isn't a car forum any more. Its a forum for lame kids.
Captain Bondo is offline   Reply With Quote
Old 11-14-2008, 01:03 PM   #21
Captain Bondo
Exklusiv Zubehör Klub
 
Captain Bondo's Avatar
 
Join Date: Sep 2002
Default

Quote:
Originally Posted by Lord Tentacle View Post
fidel sells 27 spline shafts to drop into the volvo rear end that will support 700+ ft-lbs
(simply better metal than volvo used from the factory)
($380ish per set)
combine this with a good solid center diff and the reasons to go away from the volvo unit fade quite quickly
the volvo tubes are thicker than on an 8.8 anyways
Nice work on the failtastic post. The 8.8 axle tubes on the late explorer diffs are 3.25"x0.25" -that would eat a dana 30 axle tube as a light snack in the mid afternoon.

I'll take 31 splines, clutch type posi, good aftermarket, 4x4.5 bolt pattern for the price of a junkyard pull.
Captain Bondo is offline   Reply With Quote
Old 11-14-2008, 01:18 PM   #22
Mark
sex lights
 
Mark's Avatar
 
Join Date: Dec 2006
Location: Duncan
Default

Bigbegum has an 8.8 too. Also Bondo. There's some good info on how Bigbegum narrowed his... I think he and Bondo both used Explorer rearends and only narrowed one side 'cause it's offset. This is on two series cars though.

Bigbegum is doing 1.40ish 60foot times on his 8.8 behind a built 383, so they must be pretty tough.

Something to consider on the 9" route is because they have a large pinion offset they have a higher parasitic loss... I can't remember how much exactly, but it's something to consider.

I've got a Chevy truck 12 bolt all ready to get narrowed... gonna run 9" ford axle ends so I don't need to worry about the c-clip thing one way or the other.

M.

EDIT Bondo got in before me!
__________________
Quote:
Originally Posted by Double02 View Post
Classic TBricks - pages of discussion debating whether or not to spend $20. On a tractor.
Quote:
Originally Posted by DarkKratoz View Post
Incorrect, the Frigidaire is Mark's 86 745. It's in appliance white and it is Best Car.
The Fridge; '86 745 DD-with full '94 LH2.4 swap. Now with M90!
2000 AMG E55 wagon.
'78 Honda GL1000- naked Goldwing. Sold
'76 265 wagon with Megasquirted 350 chevy and T56. Scrapped
Mark is offline   Reply With Quote
Old 11-14-2008, 01:23 PM   #23
qwkswede
Old and Slow
 
Join Date: Mar 2003
Location: Denver, CO
Default

I don't know where you guys have been. But here is the rule straight from the nhra rulebook.

http://www.geocities.com/boosted_eine/nhrarulebook.html

2.3 REAREND

After market axles and axle-retention device mandatory on any car running 10.99 (*6.99) or quicker and any car with locked differential. Cars running 10.99 (*6.99) or quicker that weigh more than 2,000 pounds (907 kg) with independent rear suspension must have swing axle differential replaced with conventional differential housing assembly.
qwkswede is offline   Reply With Quote
Old 11-14-2008, 01:26 PM   #24
qwkswede
Old and Slow
 
Join Date: Mar 2003
Location: Denver, CO
Default

Good posts guys. Thanksfor the feedback.
It looks like there is alot of merrit for the 8.8. The removable center section is the best reason to go 9". It makes gear ratio changes easy. But I suppose I won't be changing ratios all that often.

How much weight difference is there in a 9" vs 8.8. They are very close in ring gear dimension. And the simple stamped sheetmetal housings of the 9" seem pretty slimple and light.
qwkswede is offline   Reply With Quote
Old 11-14-2008, 01:28 PM   #25
Mueller
Board Member
 
Mueller's Avatar
 
Join Date: Oct 2004
Location: Antioch, CA
Default

Quote:
Originally Posted by Captain Bondo View Post
Nice work on the failtastic post. The 8.8 axle tubes on the late explorer diffs are 3.25"x0.25" -that would eat a dana 30 axle tube as a light snack in the mid afternoon.

I'll take 31 splines, clutch type posi, good aftermarket, 4x4.5 bolt pattern for the price of a junkyard pull.
that does not make them better, just heavier...of course it is dependant on the application...
Mueller is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 07:31 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.