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04-16-2010, 01:36 PM
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CC Member
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Join Date: Feb 2006
Location: Thousand Oaks,
CA
Cobra Make, Engine: Classic Roadster
Posts: 1,359
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Not Ranked
need 8.8 rear end
DV or anybody else who might know, I have the 8" rear end on my CR. It's also known as the baby 9. I need to make some repairs or up grades and want to consider an upgrade to an 8.8. Currently my 8 has a limited slip but needs rebuilding, also it's got 411 gears which I want 3.75 or 3.50 also drum brakes which I want disc, and the housing may have a slight bend in it. Since all these items add up to fix $$, I'm thinking of going to an 8.8 or 9". I have 57 1/2" from the inside wheel to the inside wheel or brake drum to brake drum. What rear should I be looking for or are all the upper and lower arms, shock mounts all custom installed to fit the CR? Or is the rear a direct bolt on unit that fits the CR, from a specific year car or truck? Thanks for your replies.
John
Last edited by MaSnaka; 04-16-2010 at 01:52 PM..
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04-16-2010, 01:40 PM
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CC Member
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Join Date: Jul 2005
Location: Bartlett,
Ill
Cobra Make, Engine: Everett-Morrison LS1
Posts: 2,448
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Not Ranked
Check with Curry Motorsports---they have /do more rear ends than anyone or maybe even everyone
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04-16-2010, 02:13 PM
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Senior Club Cobra Member
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Join Date: May 2006
Location: Manteca,
Ca.
Cobra Make, Engine: None, sold it
Posts: 2,439
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Not Ranked
John,
According to my manual the stock rear end is a 1986-1990 Mustang. No mods required.
__________________
Terry
"I may be paranoid, but that doesn't mean they are not watching me"
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04-16-2010, 02:18 PM
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CC Member
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Join Date: Jul 2007
Location: Algonquin,
IL
Cobra Make, Engine: CRII 351W/408 Stroker
Posts: 991
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Not Ranked
I would take the opportunity to upgrade to a 9" if your going to do the swap.
Just my $0.02
__________________
"the other ed"
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04-16-2010, 02:32 PM
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CC Member
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Join Date: May 2008
Location: San Jose CA,
CA
Cobra Make, Engine: SPF_R_/BRG/FRBoss302/327CI/FordEFI/Under_Car_Exh/
Posts: 2,523
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Not Ranked
9"s are reallly --heavy --
--if you can get a 31 splined 8.8 with 5 lug , that would be the ticket.
__________________
Steve SPF 2734 MK3 / Brock Coupe #54- panavia.com
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04-16-2010, 03:04 PM
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CC Member
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Join Date: Jul 2007
Location: Algonquin,
IL
Cobra Make, Engine: CRII 351W/408 Stroker
Posts: 991
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Not Ranked
Quote:
Originally Posted by PANAVIA
9"s are reallly --heavy --
--if you can get a 31 splined 8.8 with 5 lug , that would be the ticket.
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I'm probably wrong, but here's some numbers I found. I would think some extra weight in the rear area would be a good thing.
FORD REAR END WEIGHT COMPARISON 8" vs. 9"
8-inch Rear End Assembly Weight : 170 lbs.
1. Housing: 36 lbs.
2. Axles: Medium Journal, 28-spline -15 lbs. ea.
3. Brakes: Small 10" x 1¾" Drum Assemblies - 22 lbs. ea.
4. 3rd Member: Reinforced Revision 8-inch Case - 60 lbs.
9-inch Rear End Assembly Weight: 194 lbs.
1. Housing: 38 lbs.
2. Axles: Large Journal, 28-spline - 18 Lbs. ea.
3. Brakes: Massive 11-1/32 x 2½" Drum Assemblies - 26 lbs. ea.
4. 3rd Member: Conventional Diff. - 68 lbs.
a. w/Traction-Lok Diff. - 71 lbs.
__________________
"the other ed"
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04-16-2010, 03:11 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
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Not Ranked
I can provide everything that you will need including a new 9" Ford housing, axles, a center section with your choice of gears and differential, etc.
If your car is based around a Fox Mustang 8.8", it's really easy to swap.
__________________
www.lykinsmotorsports.com
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04-16-2010, 03:28 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
My Son has one (8.8) from a 91 5.0 Mustang. He is in the middle of building a race car and this one came out of the car. Currently has drum brakes. I doubt he would want much for it. It is straight and undamaged.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 04-16-2010 at 04:05 PM..
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04-16-2010, 03:36 PM
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Senior Club Cobra Member
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Join Date: May 2006
Location: Manteca,
Ca.
Cobra Make, Engine: None, sold it
Posts: 2,439
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Not Ranked
Rick,
Is it an 8.8 or a 9".
__________________
Terry
"I may be paranoid, but that doesn't mean they are not watching me"
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04-16-2010, 04:35 PM
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CC Member
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Join Date: Feb 2006
Location: Thousand Oaks,
CA
Cobra Make, Engine: Classic Roadster
Posts: 1,359
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Not Ranked
Rick,
I have the unparalell 4-link at 57 1/2" measured from the outside of the brake drums. I have a feeling that your son's may be a 3 link. Any idea what the gears are inside? posi? Please let me know.
John
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04-16-2010, 05:09 PM
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CC Member
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Join Date: Nov 1999
Location: Pentwater,
Mi
Cobra Make, Engine: Professional Cobra & Streetrod Builder
Posts: 5,352
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Not Ranked
John, SVO sells a "KIT" to change the mustang drums to Disc. Very simple swap.
If you go to a 9", who ever sells you the housing needs to sell you the same configuration of the brackets as an 8.8.
Just so you know I ran / raced the Viper powered Double Venom with an 8.8 for years!
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04-16-2010, 05:29 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
8.8 / Pretty sure posi was OEM in 91 with 5.0, 3.23 gears 4lug.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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04-16-2010, 06:10 PM
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CC Member
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Join Date: Dec 2003
Location: Framingham,
Ma
Cobra Make, Engine:
Posts: 228
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Not Ranked
Hi John,
I have 30 new 8.8" Ford 3.73 rearends in stock. I narrow them and can supply 5 lug axles & brakes and make them the width you want starting at $1610.00.
Call me with any questions.
Quote:
Originally Posted by MaSnaka
DV or anybody else who might know, I have the 8" rear end on my CR. It's also known as the baby 9. I need to make some repairs or up grades and want to consider an upgrade to an 8.8. Currently my 8 has a limited slip but needs rebuilding, also it's got 411 gears which I want 3.75 or 3.50 also drum brakes which I want disc, and the housing may have a slight bend in it. Since all these items add up to fix $$, I'm thinking of going to an 8.8 or 9". I have 57 1/2" from the inside wheel to the inside wheel or brake drum to brake drum. What rear should I be looking for or are all the upper and lower arms, shock mounts all custom installed to fit the CR? Or is the rear a direct bolt on unit that fits the CR, from a specific year car or truck? Thanks for your replies.
John
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__________________
Forte's Parts Connection
40 Pearl St
Framingham, Ma. 01702
fortesparts.com
508 875 0016
In 1993 Mike made the first conversion of a Ford Tremec to GM 5-speed. It bolts to stock bellhousings w/out an adapter. The FE Tremec, the Mustang adjustable quadrant are originals from Mike.
One of 12 Tremec Elite Distributors worldwide for: T-5, T-56 Magnum & TKO-500 & TKO-600 ,Midshifter, Frt shifter, offset Vette shifter.
Est: 1981 selling performance parts to build your dream car...
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04-16-2010, 08:20 PM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Carrollton,
TX
Cobra Make, Engine: JBL now SOLD
Posts: 1,735
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Not Ranked
John I ran the 8.8 in my CR with 580 ft/lb torque engine. Unless you run slicks you would not hook up enough to ever break it.
__________________
6th generation Texan....
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