supercoupe rearend - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 20 (permalink) Old 09-13-2003, 11:52 PM Thread Starter
 
Join Date: Sep 2002
Posts: 488
supercoupe rearend

just wanted to get something straight about supercoupes
did they come with an 8.8 rearend or 7.5? and what kind of gears did they have? the halfshafts are stronger than an LX, correct? is it different for each year? i am wondering mostly about a 91 5 speed supercoupe.
well thanx guyz
rossf83+1 is offline  
Sponsored Links
Advertisement
 
post #2 of 20 (permalink) Old 09-14-2003, 03:13 AM
The Parts Guy
 
racecougar's Avatar
 
Join Date: Jul 2002
Location: Imperial, Missouri (near St. L
Age: 36
Posts: 7,265
They all came with 8.8"s. The 5-speeds had 2.73's, the 89-93 autos had 3.27's and the 94-95 autos had 3.31's. The 5-speed passenger side halfshaft is the largest factory halfshaft for MN12's.

If I'm incorrect on any of this, feel free to correct me. I'm pretty certain that my info is correct.

-Rod

Rod @ AzzKicker Cars
[email protected]
90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
racecougar is offline  
post #3 of 20 (permalink) Old 09-14-2003, 03:37 AM
TCCoA Bachelor Club Pres.
 
92CougLS's Avatar
 
Join Date: Nov 2002
Location: WA
Age: 35
Posts: 1,267
Garage
Are the halfshafts interchangeable, like, can I run two pass side halfshafts, on on duh the passenger side, and one on the driver side?

-Kurt
1995 Mercury Cougar XR7
4.6L Bone Stock.
Undergoing a light refurbish
92CougLS is offline  
Sponsored Links
Advertisement
 
post #4 of 20 (permalink) Old 09-14-2003, 08:26 AM
 
Join Date: Jul 2003
Posts: 7
Exclamation

The 1994 & 1995 autos had 3.27s as well.
Thundersteel is offline  
post #5 of 20 (permalink) Old 09-14-2003, 11:42 AM Thread Starter
 
Join Date: Sep 2002
Posts: 488
well what about the n/a 3.8's
are they also 8.8?
rossf83+1 is offline  
post #6 of 20 (permalink) Old 09-14-2003, 12:59 PM
The Parts Guy
 
racecougar's Avatar
 
Join Date: Jul 2002
Location: Imperial, Missouri (near St. L
Age: 36
Posts: 7,265
92CougLS,

Yes, they are interchangeable from side to side.


Thundersteel,

I'm pretty sure that the 94-95 SC autos had 3.31's, not 3.27's.


rossf83+1,

The N/A 3.8's came standard with the 7.5", with the 8.8" as an option.


-Rod

Rod @ AzzKicker Cars
[email protected]
90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
racecougar is offline  
post #7 of 20 (permalink) Old 09-14-2003, 01:44 PM Thread Starter
 
Join Date: Sep 2002
Posts: 488
'preciate it
your the man
rossf83+1 is offline  
post #8 of 20 (permalink) Old 09-14-2003, 07:42 PM
 
Join Date: Jul 2003
Posts: 7
Question

Maybe it's both?

In the service manual, one place lists four different ratios (2.73, 3.08, 3.27, & 3.31), while elsewhere it lists only three (all but the 3.31).
Thundersteel is offline  
post #9 of 20 (permalink) Old 09-14-2003, 11:58 PM
VA Chapter Director
 
Jason Miller's Avatar
 
Join Date: Jul 2002
Location: Dover, DE
Age: 44
Posts: 729
Send a message via AIM to Jason Miller
My friends 95 SC auto came with the 3.31 gears but my 94 SC auto came with 3.27's. I know mine had the 3.27's for sure as I just wapped out the pumpkin not too long ago and that was on the tag.

Member MAMN12 Drag Racing team Best ET 12.44 @109mph
Click here to check out the Mid Atlantic chapter
Jason Miller is offline  
post #10 of 20 (permalink) Old 09-15-2003, 04:05 PM
3rd Gear Poster
 
Jimmy 2Coupes's Avatar
 
Join Date: Jul 2002
Location: Adrian Michigan
Posts: 132
Smile

All 95 auto's came with 3.31's I believe. From what Jason Miller posted it sounds like some 94 auto's came with 3.27's and some with with 3.31's. I know for a fact my 94 auto came with 3.31's which is represented by axle code 9 on the vehicle certification label located on the driver side door piller. Actually Jason is the only 94 owner I know of with 3.27's as all others I've talked to about this have 3.31's. Any more 94 automatic owners with 3.27's?

1995 SC (five speed)
Best E.T. [email protected]
Best MPH [email protected]
Best 60' 1.7489

1994 SC (automatic) [email protected]
On a stock long block with bolt on's
Sweet SC, lower13's coming.
Jimmy 2Coupes is offline  
post #11 of 20 (permalink) Old 09-15-2003, 11:41 PM
5th Gear Poster
 
T-bird4vr's Avatar
 
Join Date: Mar 2003
Location: Wichita, KS
Age: 37
Posts: 369
Send a message via AIM to T-bird4vr
I have a 95 auto with 3.31's that I swapped for a t-lock 3.27's.
Everyone needs a t-lock and money for new rear tires.

I have heard there are some 3.27's stock though.
-Julian
T-bird4vr is offline  
post #12 of 20 (permalink) Old 09-16-2003, 02:46 PM
3rd Gear Poster
 
Jimmy 2Coupes's Avatar
 
Join Date: Jul 2002
Location: Adrian Michigan
Posts: 132
Smile

Everyone needs a t-lock and money for new rear tires.

I here you T-bird4vr. I also switched to a trac-lok differential in my 94 auto but for gears I went with 3.55's. Can you say smoke'm at will boy's and girl's???

1995 SC (five speed)
Best E.T. [email protected]
Best MPH [email protected]
Best 60' 1.7489

1994 SC (automatic) [email protected]
On a stock long block with bolt on's
Sweet SC, lower13's coming.
Jimmy 2Coupes is offline  
post #13 of 20 (permalink) Old 09-16-2003, 11:03 PM
5th Gear Poster
 
T-bird4vr's Avatar
 
Join Date: Mar 2003
Location: Wichita, KS
Age: 37
Posts: 369
Send a message via AIM to T-bird4vr
Jimmy, are 3.55's the way to go, or would you say get the 73's? I couldn't make up my mind and was getting tired of 1 leggers so just rebuilt the t-lock and put it in. Diff was from an older auto.

-Julian
T-bird4vr is offline  
post #14 of 20 (permalink) Old 09-18-2003, 04:04 PM
3rd Gear Poster
 
Jimmy 2Coupes's Avatar
 
Join Date: Jul 2002
Location: Adrian Michigan
Posts: 132
Smile

Julian, for a 94 or 95 SC with the 4R70W transmission I believe 3.55's to be the best choice. For an 89-93 SC with an AOD transmission 3.73's seem to be the best choice. The transmission gear ratios from 1'st to 4’Th for the 4R70W are 2.84, 1.55, 1.00, and 070. For the AOD they are 2.40, 1.47, 1.00, and 0.67. With the lower 1'st and 2'nd gears of the 4R70W you will still have a higher final drive ratio with 3.55's than an AOD SC with 3.73's...especially 1'st gear which would be 10.082 final drive for the 4R70W vs. 8.952 final drive for the AOD to be exact. It's my opinion that 3.73's are TOO much gear for a 4R70W equipped (94/5) SC.

1995 SC (five speed)
Best E.T. [email protected]
Best MPH [email protected]
Best 60' 1.7489

1994 SC (automatic) [email protected]
On a stock long block with bolt on's
Sweet SC, lower13's coming.
Jimmy 2Coupes is offline  
post #15 of 20 (permalink) Old 09-18-2003, 10:02 PM
5th Gear Poster
 
T-bird4vr's Avatar
 
Join Date: Mar 2003
Location: Wichita, KS
Age: 37
Posts: 369
Send a message via AIM to T-bird4vr
Thanks Jimmy. I might have to make this a winter project. I should be able to borrow the tools to align the gears. Maybe.

-Julian
T-bird4vr is offline  
post #16 of 20 (permalink) Old 09-19-2003, 03:24 PM
VA Chapter Director
 
Jason Miller's Avatar
 
Join Date: Jul 2002
Location: Dover, DE
Age: 44
Posts: 729
Send a message via AIM to Jason Miller
Just to throw in my 2 cents, I have the 3.73 gears in my 94 SC and with me in the car it weights over 4200 lbs. That's alot of weight to get moving. Thoes extra low gears realy help get the car moving off the line.

Member MAMN12 Drag Racing team Best ET 12.44 @109mph
Click here to check out the Mid Atlantic chapter
Jason Miller is offline  
post #17 of 20 (permalink) Old 09-22-2003, 01:08 PM
13's or Mildly Broken
 
Join Date: Jul 2002
Location: Blair, Nebraska
Age: 36
Posts: 2,670
Jason - what kind of gas mileage are you getting with 3.73's? Just curious if you have an idea since I'll be going with 3.73's in the future - just looking for an idea of what the gas mileage will be.

-Andy "Melon"

1994 Thunderbird SC 3.8L Supercharged
1999 Crown Victoria P71 4.6
2000 Explorer 5.0
Melon is offline  
post #18 of 20 (permalink) Old 09-22-2003, 02:04 PM
The Parts Guy
 
racecougar's Avatar
 
Join Date: Jul 2002
Location: Imperial, Missouri (near St. L
Age: 36
Posts: 7,265
With my splitport tbird (which has 3.73's), I've been averaging 22-24 MPG on the highway (cruising around 75-80 MPH) as long as I take it easy on the throttle. Around town, I've been getting between 15-20 MPG. It really depends on how often you "get on it".

-Rod

Rod @ AzzKicker Cars
[email protected]
90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
2 - 90 35th Anny Ed SC's
And a TON of parts cars!
racecougar is offline  
post #19 of 20 (permalink) Old 09-22-2003, 05:17 PM
VA Chapter Director
 
Jason Miller's Avatar
 
Join Date: Jul 2002
Location: Dover, DE
Age: 44
Posts: 729
Send a message via AIM to Jason Miller
I think around town I lost about 1-2 mpg. But you're talking to a guy who likes to take off from the light quickly. On the highway I haven't noticed any change at all. I suppose if I kept it out of the boost around town I would get back thoes 1-2 mpg but, where's the fun in that.

Member MAMN12 Drag Racing team Best ET 12.44 @109mph
Click here to check out the Mid Atlantic chapter
Jason Miller is offline  
post #20 of 20 (permalink) Old 09-22-2003, 11:36 PM
13's or Mildly Broken
 
Join Date: Jul 2002
Location: Blair, Nebraska
Age: 36
Posts: 2,670
Thanks guys.. doesn't sound like my mpg will hurt too bad as long as I don't play with it. I'll be running with a 3.27 rear end for a while. Got a few other things I want to do first.

I just figure the 3.73's will be good enough for the track, but still give me decent gas mileage when I feel like driving my 'Bird around.

-Andy "Melon"

1994 Thunderbird SC 3.8L Supercharged
1999 Crown Victoria P71 4.6
2000 Explorer 5.0
Melon is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome