5.0 with 7.5 rear??

Ieatcamaros · 10-26-2003, 12:20 AM

Anyone ever seen a 5.0 mustang that came with a 7.5 rear end? I think I have just seen the first one. An 89GT, manufactured 09/88. It came with the 5.0 motor and it has a 7.5 rear end in it. WTF is this?? I thought all 5.0's came with 8.8 rear end. Someone had to put that 7.5 in there, or am I just kidding myself?

TwiLighTBluEGT · 10-26-2003, 12:24 AM

All pre-86 5.0's had the 7.5" rear. Don't know why an 89 would have a weak 7.5" rear in it.

tireburner163 · 10-26-2003, 02:12 AM

Quote:

Originally posted by TwiLighTBluEGT
All pre-86 5.0's had the 7.5" rear. Don't why an 89 would have a weak 7.5" rear in it.

Dark Knight · 10-26-2003, 07:58 AM

are you sure it's not an 8.8? they look close to the same..

Ieatcamaros · 10-26-2003, 08:35 AM

Well, I was going by the diagram it shows in the summit book on pa ge 233 (old book). But after lookin online at richmond gear.com I may be wrong. Look at these pictures and the ones in the summit book. They are not the same. The 7.5 appears to be the same, but the 8.8 is different. The book does not show a hole in the center at the top and bottom. The internet does.

TwiLighTBluEGT · 10-26-2003, 12:41 PM

Go to http://www.mustanggt.org and click "Info by year," then click on 1986. I believe it says that it was the first year of the 8.8" in a fox.

QuantumMotorsports · 10-26-2003, 07:10 PM

Look at the shape of the diff cover. The 7.5 has rounded sides, the 8.8 has four straight sides with rounded corners. the pic you showed is a 7.5.

LX5liter · 10-27-2003, 03:48 PM

If there is a 7.5 in it, then somebody swapped it before you had it.

Ieatcamaros · 10-27-2003, 11:34 PM

I finally got my *%*^(*! internet working again. Right when I was posting the pictures my internet took a dump on me. Here is the other picture I was trying to post. It has got to be the 8.8, it is the factory rear end. I was simply going by the diagrams in the summit book. Obviously, they have the diagram for the 8.8 turned 90 degrees. If you look at the two pics I posted, and then look in the summit book, you will see why I was misled. Sorry for the confusion.

10-26-2003, 12:20 AM	#1
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	5.0 with 7.5 rear?? Anyone ever seen a 5.0 mustang that came with a 7.5 rear end? I think I have just seen the first one. An 89GT, manufactured 09/88. It came with the 5.0 motor and it has a 7.5 rear end in it. WTF is this?? I thought all 5.0's came with 8.8 rear end. Someone had to put that 7.5 in there, or am I just kidding myself? __________________ The sig says it all.

10-26-2003, 12:24 AM	#2
TwiLighTBluEGT Registered Member Join Date: Jun 2002 Location: Massachusetts Posts: 157	All pre-86 5.0's had the 7.5" rear. Don't know why an 89 would have a weak 7.5" rear in it. __________________ 1991 Mustang GT Conv: 58,000 original miles, 2nd owner. Engine: FMS 65mm tb/spacer, C&L 73mm maf, MAC cai. Drivetrain: Built AOD w/ Edge 2800rpm lockup converter, hardened 3-4 inner shaft, Trans-Go shift kit, B&M supercooler, FMS 3.73 gears & aluminum d/s, rebuilt traction lock. Exhaust: BBK unequal length shorty headers, BBK o/r h-pipe, Flowmaster 2 chamber mufflers. Chassis/suspension/brakes: Kenny Brown supersubs. The rest is stock. Last edited by TwiLighTBluEGT; 10-26-2003 at 12:42 PM..

10-26-2003, 07:58 AM	#4
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	are you sure it's not an 8.8? they look close to the same.. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

10-26-2003, 08:35 AM	#5
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Well, I was going by the diagram it shows in the summit book on pa ge 233 (old book). But after lookin online at richmond gear.com I may be wrong. Look at these pictures and the ones in the summit book. They are not the same. The 7.5 appears to be the same, but the 8.8 is different. The book does not show a hole in the center at the top and bottom. The internet does. __________________ The sig says it all.

10-26-2003, 12:41 PM	#6
TwiLighTBluEGT Registered Member Join Date: Jun 2002 Location: Massachusetts Posts: 157	Go to http://www.mustanggt.org and click "Info by year," then click on 1986. I believe it says that it was the first year of the 8.8" in a fox. __________________ 1991 Mustang GT Conv: 58,000 original miles, 2nd owner. Engine: FMS 65mm tb/spacer, C&L 73mm maf, MAC cai. Drivetrain: Built AOD w/ Edge 2800rpm lockup converter, hardened 3-4 inner shaft, Trans-Go shift kit, B&M supercooler, FMS 3.73 gears & aluminum d/s, rebuilt traction lock. Exhaust: BBK unequal length shorty headers, BBK o/r h-pipe, Flowmaster 2 chamber mufflers. Chassis/suspension/brakes: Kenny Brown supersubs. The rest is stock.

10-26-2003, 07:10 PM	#7
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	Look at the shape of the diff cover. The 7.5 has rounded sides, the 8.8 has four straight sides with rounded corners. the pic you showed is a 7.5. __________________ Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites

10-27-2003, 03:48 PM	#8
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	If there is a 7.5 in it, then somebody swapped it before you had it. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

10-27-2003, 11:34 PM	#9
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	I finally got my %^(*! internet working again. Right when I was posting the pictures my internet took a dump on me. Here is the other picture I was trying to post. It has got to be the 8.8, it is the factory rear end. I was simply going by the diagrams in the summit book. Obviously, they have the diagram for the 8.8 turned 90 degrees. If you look at the two pics I posted, and then look in the summit book, you will see why I was misled. Sorry for the confusion. __________________ The sig says it all.

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