Rear end gears on 90 GT?

00'BlackSteed · 08-02-2001, 02:57 AM

I am about to trade my brother cars in about two days(my 00' GT for his 90' GT). I was wondering if the 90 GT comes with 3.08's in the rear or 3.27's. He wants me to put the stock 3.27's in the 00' GT for him which is cool. I want to know will the 3.73 gears fit in the 90 GT and if they do should i use them or should I get 3.55's instead. Please advise.

------------------
00'GT,(S281 clone),3 chamber flows,K&N filter,BBK underdrive pulleys & 3.73 gears. No time slip as of yet(est.13.7-13.9)

dirtyGT · 08-02-2001, 04:30 AM

If there stock there either 2.73's or 3.08.I would go with 3.73's

------------------
P.M.D. PERFORMANCE 88GT
306ci
paracing.net

86LX5liter · 08-02-2001, 10:37 AM

stock 5 speeds are 2.73's. stock auto's are 3 .08. this also holds true for 4 cylinder cars. you can look opn the pumpkin. there is usually a small metal punch tagn with some numbers. The SVO's in the 80's came with 3.27's some of em.

------------------
Warmed over 302,
Edelbrock Carb, MSD, Accel, t-5 w/ frpp flywheel & clutch, Hurst shifter, traction bars, ds safety loop, subframes, 3.08 posi, shorties, H, and Flows. Same setup w/ auto netted a 12.54 @ 110.90
in a 300 lbs heavier car.
Can't wait till Spring for E-town.
1981 GT

[This message has been edited by 86LX5liter (edited 08-02-2001).]

dinomite · 08-02-2001, 11:23 AM

no, the way you find gears is by the tag on the drivers side. the 87-93 came with 2.73, 3.08, and 3.27, you can't tell what gears you have by tranny, as i have an AOD with 2.73s. its also a vert, so needless to say, its slow.

------------------
90LX AOD Convertable: Lakewood control arms, FMS springs.
Best 1/4: 15.277@92.25 (2.27 60')
AIM: dinomite1, roadracestang
dinomite@softhome.net

ultrastang · 08-02-2001, 12:57 PM

There should be an I.D. tag affixed to one of the rear end's rear cover bolts. There will be two strings of letters and numbers on the tag. Starting with the second string, should read something like: 2.73, 2L73, 3.08, 3L08, etc. This will be the rear end ratio. The "L" denotes a locking differential (Tracion-Lok). An even easier way to tell, without crawling under the car, is to look at the warranty sticker, on the driver's side door jamb, under the "Axle" heading.
In 1990:
2.73:1 is code letter M (locking) or code number 8 (non-locking).
3.08:1 is code letter Z (locking) or code letter Y (non-locking).
3.27:1 is E (locking) or 5 (non-locking).
3.45:1 is R (locking) or F (non-locking).
3.73:1 is W (locking_ or 6 (non-locking).

08-02-2001, 02:57 AM	#1
00'BlackSteed Registered Member Join Date: May 2001 Location: Ontario, CA., U.S.A. Posts: 30	Rear end gears on 90 GT? I am about to trade my brother cars in about two days(my 00' GT for his 90' GT). I was wondering if the 90 GT comes with 3.08's in the rear or 3.27's. He wants me to put the stock 3.27's in the 00' GT for him which is cool. I want to know will the 3.73 gears fit in the 90 GT and if they do should i use them or should I get 3.55's instead. Please advise. ------------------ 00'GT,(S281 clone),3 chamber flows,K&N filter,BBK underdrive pulleys & 3.73 gears. No time slip as of yet(est.13.7-13.9)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
93 gt conv rear end question	sos	Windsor Power	1	03-03-2004 10:11 PM
Rear End Gears	raptor	Windsor Power	13	11-01-2002 01:33 AM
rear gears	madokie	Windsor Power	1	06-21-2002 03:46 PM
2002 GT vs 1987 GT Review LONG	Unit 5302	Blue Oval Lounge	11	06-09-2002 05:29 PM
Rear gears	dinomite	Corner Carvers Delight	3	05-08-2001 05:25 PM

08-02-2001, 04:30 AM	#2
dirtyGT Registered Member Join Date: Feb 2000 Location: INDIANA Posts: 658	If there stock there either 2.73's or 3.08.I would go with 3.73's ------------------ P.M.D. PERFORMANCE 88GT 306ci paracing.net

08-02-2001, 10:37 AM	#3
86LX5liter Registered Member Join Date: Dec 1999 Location: NY Posts: 524	stock 5 speeds are 2.73's. stock auto's are 3 .08. this also holds true for 4 cylinder cars. you can look opn the pumpkin. there is usually a small metal punch tagn with some numbers. The SVO's in the 80's came with 3.27's some of em. ------------------ Warmed over 302, Edelbrock Carb, MSD, Accel, t-5 w/ frpp flywheel & clutch, Hurst shifter, traction bars, ds safety loop, subframes, 3.08 posi, shorties, H, and Flows. Same setup w/ auto netted a 12.54 @ 110.90 in a 300 lbs heavier car. Can't wait till Spring for E-town. 1981 GT [This message has been edited by 86LX5liter (edited 08-02-2001).]

08-02-2001, 11:23 AM	#4
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	no, the way you find gears is by the tag on the drivers side. the 87-93 came with 2.73, 3.08, and 3.27, you can't tell what gears you have by tranny, as i have an AOD with 2.73s. its also a vert, so needless to say, its slow. ------------------ 90LX AOD Convertable: Lakewood control arms, FMS springs. Best 1/4: 15.277@92.25 (2.27 60') AIM: dinomite1, roadracestang dinomite@softhome.net

08-02-2001, 12:57 PM	#5
ultrastang Registered Member Join Date: Jul 2001 Location: Fordyce, AR, USA Posts: 13	There should be an I.D. tag affixed to one of the rear end's rear cover bolts. There will be two strings of letters and numbers on the tag. Starting with the second string, should read something like: 2.73, 2L73, 3.08, 3L08, etc. This will be the rear end ratio. The "L" denotes a locking differential (Tracion-Lok). An even easier way to tell, without crawling under the car, is to look at the warranty sticker, on the driver's side door jamb, under the "Axle" heading. In 1990: 2.73:1 is code letter M (locking) or code number 8 (non-locking). 3.08:1 is code letter Z (locking) or code letter Y (non-locking). 3.27:1 is E (locking) or 5 (non-locking). 3.45:1 is R (locking) or F (non-locking). 3.73:1 is W (locking_ or 6 (non-locking).