i-6 rear end question

12-23-2002, 05:38 AM

man this forum is dead! so i thought i'd throw this in here. does anyone happen to know what read end the 3.3 i-6 mustang ghia uses? and what a good upgrade one would be.... thanks in advance.

DAN-MAN · 12-25-2002, 12:18 AM

I'm guessing, since it's an inline six, maybe a 7.5 rearend?

Daniel.

12-25-2002, 07:11 PM

yeah thats what i was think too, but i can't find any information on the rear ends for those cars. thanks for the help dude.

DAN-MAN · 12-26-2002, 02:48 AM

Quote:

Originally posted by digital3.3
yeah thats what i was think too, but i can't find any information on the rear ends for those cars. thanks for the help dude.

No problem.

Daniel.

84LX89GT · 12-26-2002, 03:01 AM

yeah it's most likely a 7.5" rear, the current V6 mustang uses that rear axle and it was used in 5.0L applications up till '85 i believe. You can find some 7.5" rears from rangers with 3.73 and 4.11 gears as well for a good price basically new (if you wanted to dissassemble and swap over the ring gear) and also alot of the 5.0L equipped mid 80's mustangs that had the 7.5" rear end had traction-lok limited slip units. My '84 5.0L that i had, had traction-lok with 3.08 gears.
I think there are some oddball early 80's 6 and 4 cylinders that came with 6.75" rear ends, which are absolutely useless for anything above stock performance. You also had the early 80's pre-overdrive transmission rear gear ratios like 2.27:1 and other crazy stuff like that.
One way to find out what axle code you have is to look on the door tag under axle and see what letters/numbers you have and to look in a referance book like chiltons, haynes etc.
You can also swap in an 8.8" from '86 and newer 5.0L's and it's a direct bolt in, although you may have to get new rear brakes lines for the larger rear drum brakes. If you feel like spending some money you can get one out of a new mustang, or '87 to '88 thunderbird turbo coupe with rear disc brakes and swap over the master cylinder from a thunderbird turbo coupe as well as eliminate the metering block that is meant to apply the drums first.
The 8.8" rear axle is meant for more severe abuse and will handle an incredible amount of torque before they fail and are real easy to upgrade and make stronger with a re-inforced cover and welded axle tubes.
If i were you though, i'd probably go the cheap route and get used gears (it's easy to see if they're worn or not, pattern easy to see on ring gear) as well as maybe a new or used limited slip unit depending on if you get enough power to spin the tires.
I hope this was helpful, if you have any other questions feel free to ask.

12-26-2002, 03:29 AM

once again you have help me out quite abit and thanks. yeah i was thinking about either swapping the gears or changing the axle to 8.8. yeah i can spin the tire actually

and that axle has taken a hell of beating and is still going strong but i want to upgrade and was just wondering about what may be in it. thanks again.

12-23-2002, 05:38 AM	#1
digital3.3 Guest Posts: n/a	i-6 rear end question man this forum is dead! so i thought i'd throw this in here. does anyone happen to know what read end the 3.3 i-6 mustang ghia uses? and what a good upgrade one would be.... thanks in advance.

12-25-2002, 12:18 AM	#2
DAN-MAN Confederate Cowboy Join Date: May 2002 Location: Southeast Missouri Posts: 546	I'm guessing, since it's an inline six, maybe a 7.5 rearend? Daniel. __________________ DAN-MAN RHC MEMBER #25

12-26-2002, 03:01 AM	#5
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	yeah it's most likely a 7.5" rear, the current V6 mustang uses that rear axle and it was used in 5.0L applications up till '85 i believe. You can find some 7.5" rears from rangers with 3.73 and 4.11 gears as well for a good price basically new (if you wanted to dissassemble and swap over the ring gear) and also alot of the 5.0L equipped mid 80's mustangs that had the 7.5" rear end had traction-lok limited slip units. My '84 5.0L that i had, had traction-lok with 3.08 gears. I think there are some oddball early 80's 6 and 4 cylinders that came with 6.75" rear ends, which are absolutely useless for anything above stock performance. You also had the early 80's pre-overdrive transmission rear gear ratios like 2.27:1 and other crazy stuff like that. One way to find out what axle code you have is to look on the door tag under axle and see what letters/numbers you have and to look in a referance book like chiltons, haynes etc. You can also swap in an 8.8" from '86 and newer 5.0L's and it's a direct bolt in, although you may have to get new rear brakes lines for the larger rear drum brakes. If you feel like spending some money you can get one out of a new mustang, or '87 to '88 thunderbird turbo coupe with rear disc brakes and swap over the master cylinder from a thunderbird turbo coupe as well as eliminate the metering block that is meant to apply the drums first. The 8.8" rear axle is meant for more severe abuse and will handle an incredible amount of torque before they fail and are real easy to upgrade and make stronger with a re-inforced cover and welded axle tubes. If i were you though, i'd probably go the cheap route and get used gears (it's easy to see if they're worn or not, pattern easy to see on ring gear) as well as maybe a new or used limited slip unit depending on if you get enough power to spin the tires. I hope this was helpful, if you have any other questions feel free to ask. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rear end question	Vishnoff	Classic Mustangs	2	10-17-2003 03:47 PM
Rear axle removal question	BLACK85GT	Windsor Power	2	01-06-2003 09:08 PM
88 GT - rear exhaust question	Mustang_289	Windsor Power	3	09-11-2001 08:08 AM
question on fuel system and rear gears and launching	vetteeatr	Windsor Power	1	08-12-2001 05:28 PM
just bought a new rear end and have question	Z28EATR	Blue Oval Lounge	2	04-05-2001 08:25 PM

12-25-2002, 07:11 PM	#3
digital3.3 Guest Posts: n/a	yeah thats what i was think too, but i can't find any information on the rear ends for those cars. thanks for the help dude.

12-26-2002, 03:29 AM	#6
digital3.3 Guest Posts: n/a	once again you have help me out quite abit and thanks. yeah i was thinking about either swapping the gears or changing the axle to 8.8. yeah i can spin the tire actually and that axle has taken a hell of beating and is still going strong but i want to upgrade and was just wondering about what may be in it. thanks again.