rear axle ratio RPO

DoubleDown · 07-12-2002, 05:29 PM

GU4=3.08
GU5=3.23
GU6=3.42
GT4=3.73
GT5=4.10
HC4=4.56

G80 - locking differential

compare to the codes in your glove box to know which gear ratio you have

pyros46290 · 09-28-2002, 12:44 AM

i found the sticker and it has a bunch of lil codes on it and it said G80 on one of them but i dont have a locking diff, i have limited slip....

Flamed 98 · 09-28-2002, 01:02 AM

The G80 is a limited slip, everyone just calls it a locker because they don't know the diffrence

pyros46290 · 09-28-2002, 01:41 AM

didnt some of the 1st gen blazer 4x4s come with electric lockers?

Alanky · 09-30-2002, 01:15 AM

Mine says GQ1 :confused: I have been to a few places and nobody seems to know my gear ratio, So I guess I'm an odd ball. I may be looking at the wrong thing? :confused: but I doubt it. If anyone knows what I have let me know! It is a 1984 S-10 Sport.

Im thinking it may be 4:10 or something around there, because it turns VERY high RPMS and gets horrible Gas milage with the V8.

pyros46290 · 10-09-2002, 12:18 AM

note to self: transfer case ratio is stamped onto a tag that is on the back of the transfer case (case ratio is 2.72) now i just need to know my axle ratios......

2LO4U · 10-15-2002, 07:38 PM

i have the g80 code... and I have a straight up locker. I had to take it out cause I fragged a few teeth off my pinion. But it is no doubt a locker and now a limited slip.

JJ

DoubleDown · 10-16-2002, 04:37 AM

Quote:

Originally posted by Flamed 98
...because they don't know the diffrence

you're right, you dont know the difference.

Quote:

Differential, locking rear (not available with Vortec 2200 L4 engine)

http://www.chevrolet.com/s10/library...ex_chassis.htm

badassbrad · 10-19-2002, 07:35 AM

www.smokemup.com

RedSpeck_09 · 11-21-2002, 12:08 AM

i just checked my beater and its says GT5. that just doesn't make sense to me. a 4 banger with a 4:10 ratio? its a 95 2.2 5 speed. can anybody tell me about this?

DoubleDown · 11-26-2002, 02:40 PM

that is correct. they need to use the low gear ratio to multiply the little amount of torque the 4cyl puts out. damn near every s10 with the 4cyl and auto tranny has 4.10 rear ratio.

boggs · 11-29-2002, 10:58 AM

Quote:

Originally posted by Alanky
Mine says GQ1 :confused: I have been to a few places and nobody seems to know my gear ratio, So I guess I'm an odd ball. I may be looking at the wrong thing? :confused: but I doubt it. If anyone knows what I have let me know! It is a 1984 S-10 Sport.

Im thinking it may be 4:10 or something around there, because it turns VERY high RPMS and gets horrible Gas milage with the V8.

G80 = LIMITED SLIP DIFF
2.73 = GU2
3.08 = GU4
3.42 = GU6
3.73 = GT4, GQ1
4.10 = GT5

babys10 · 11-29-2002, 11:24 AM

i know there are treads about this but im a dumb ass

what do i need to do or should do to get better traction
i have 95 4.3tbi 5 speed GU4

gmc-xpress · 11-30-2002, 11:56 AM

OKAY THIS IS WAT IS SAW INMY GLOVE BOX BY THE RPO CODE......THERE IS NO G80 IN THERE FOR THE POSI REAR....BUT Y AROUND TURNS AND IN THE RAIN AND ON DIRT DO I MOST OF THE TIME GET 2 TIRES........AND WHERE IS THE WEB SITE OR PHNE # TO GET A LOCKER AND HOW MUCH......THANKS AGIAN GUYS

Beasthead2 · 12-16-2002, 07:05 AM

Me and the OEM's consider the g80 gov-lock a locker. The industry may sometimes use the term "limited slip" when selling you a car, to mean any kind of traction device in general. Be it a locker, limited slip, or computer traction control. The true term evolved to mean non locking differentials, with friction plates to "limit" slip instead of prevent slip. A limited slip gives alot of resistance to differential action at all speeds and at all times, and never locks.
This leaves the definition of locker to mean a device that completely locks the diff at some time. The g80 gov lock locks completely 100% when it does lock. The only reason an aftermarket locker is different is because they lock with any slight difference in torque between the wheels, while the gov-lock locks due to a significant difference in wheel speed between the two wheels. So the gov lock will spin some before it locks. I think the gov lock is supposed to give a little resistance before it locks with friction plates, but not nearly as much as a limited slip. Mine has worn down to where it has no resistance at all until it locks completely.

Call it "inferior","not a locker", "a posi", call it whatever you want'; but it is simply bad English to call this, strictly, a "limited slip"

Unless you're saying "limited slip" to include all lockers because it is true that something that completely prevents slip also limits it. But thats like saying a full glass is also 1/2 full because it has 1/2 full plus the other 2nd half.

Black Dragon · 12-21-2002, 12:57 AM

which trucks usually come with 3.42 from the factory ????

F-i-Z-i-T · 12-24-2002, 11:09 AM

I have a 94 4.3L TBI with a

2.73!!

GU2

ZR1 S10 · 01-20-2003, 09:24 AM

What'dya get in first like 45mph lol

Dave · 01-21-2003, 08:19 PM

Black Dragon:

I just picked up a rear axle from a 87 GMC S15 4x4, the codes in the glove box were GU6 and G80. I understand this means 3:42's Posi. I believe this is a factory option in most of these trucks. I just got this from the scrapyard. Hope this helps
Dave

sonomaracer · 01-24-2003, 11:22 AM

i've got 3.42's with a torsen LSD.:guitar:

MyXtreme2000 · 01-24-2003, 07:03 PM

My Old 94SS and my 00 Xtreme both with V6 and Auto
came with 3:42.1 from the factory

meangreen9c1 · 01-30-2003, 12:35 PM

Don't all 2.2s come with the 4.10s?

pnut420 · 02-06-2003, 02:32 AM

Quote:

Originally posted by MyXtreme2000
My Old 94SS and my 00 Xtreme both with V6 and Auto
came with 3:42.1 from the factory

I have a 2001 sonoma V6 with 3:42:1 with limited slip, It spins both tires on the pavement all the time, but a few times in the mud and snow only one tire was really spinning good

DoubleDown · 02-06-2003, 11:48 AM

Quote:

Originally posted by meangreen9c1
Don't all 2.2s come with the 4.10s?

no, many come with 3.73s also.

wolfmangk · 02-07-2003, 01:30 PM

The higher the ratio the better the gas mileage, correct?

DoubleDown · 02-08-2003, 01:07 AM

taller gears (lower numbers) are better for gas mileage.

3.08 gets better mileage than 4.56

DimeTime · 02-09-2003, 02:08 PM

I have a 01 w/ 4.10, and i was wondering how much of a difference it makes in acceleration, and in gas milage, if someone has changed from 4.10 to 4.56

2,5 to LS1 · 02-26-2003, 04:38 PM

Alanky
i too have that gq1 , need to get more info cause i just got the pick up on the weekend its a 91 5speed with a 2,5 tbi!
can you post the next code after that...i have a scratch there so hard reading....(??4) the 4 is for sure the first digits are ??

babys10 · 03-01-2003, 01:53 PM

ok i just bought 03 s10 v6
code say
GU6
G80
that means i have 3.42 with a locker right??

SSsonoma43 · 03-01-2003, 04:18 PM

Thats right.

babys10 · 03-03-2003, 10:42 AM

thats f*ckin cool huh??

wolfmangk · 03-14-2003, 11:28 AM

Quote:

Originally posted by Black Dragon
which trucks usually come with 3.42 from the factory ????

Mine!

:cry: :cry:

I want better mileage!

91sdime · 03-14-2003, 02:05 PM

3.08 with an open rear..that sucks. I wonder if I can find a quaife type diff for my truck. Anyone know if a company makes a lsd with all gears..(no clutches or cones to wear out)?

ZackaryMac · 03-15-2003, 10:07 PM

My 1991 2wd Sonoma with 4.3 TBI, 4spd auto has a 3.42 in the rear (for now..heh heh).

redSStreak · 03-16-2003, 03:50 PM

are these codes the same in the full size trucks????

Waverly360 · 03-27-2003, 08:14 PM

Hey everyone.

Okay, I need to replace the rear driver side axle on my truck, and I'd like to know if the axle in my 3.42 is the same as the one in a 3.73.

I can't check the glove box at this time for my truck's codes, but I can tell you that it's a 98 s10 extended cab with a 4.3 V6. I THINK it's a 3.42, but I'm not positive about that.

Also, if I read the earlier posts right (yeah...I'm a newbie at drivetrain tech), if I decided to change out my rear end with the 3.73, that would make my truck faster, but less efficient on gas?

Any "helpful" comments would be appreciated.

Any flames..well, they'd be duly noted.

03 SS · 04-20-2003, 11:48 PM

Your correct. It would make it quicker out of the hole but not as efficient on gas. You rpms will raise a little also.

Larry Black · 04-22-2003, 08:56 PM

there are two different types of axles used. the number of splines that fit into the spyder gears make the differe

07-12-2002, 05:29 PM	#1
DoubleDown ZQ8 2001 Age: 26 Join Date: Aug 2001 Posts: 909 Location: Vegas User is: OffLine	rear axle ratio RPO GU4=3.08 GU5=3.23 GU6=3.42 GT4=3.73 GT5=4.10 HC4=4.56 G80 - locking differential compare to the codes in your glove box to know which gear ratio you have
	[Reply w/Quote]

09-28-2002, 12:44 AM	#2
pyros46290 Registered User Age: 25 Join Date: Sep 2002 Posts: 1,636 Location: danville, ca User is: OffLine	i found the sticker and it has a bunch of lil codes on it and it said G80 on one of them but i dont have a locking diff, i have limited slip.... Last edited by pyros46290 : 09-28-2002 at 12:50 AM.
	[Reply w/Quote]

09-28-2002, 01:02 AM	#3
Flamed 98 I BURN THINGS Age: 27 Join Date: Jul 2001 Posts: 5,983 Location: Ft. Wayne User is: OffLine	The G80 is a limited slip, everyone just calls it a locker because they don't know the diffrence
	[Reply w/Quote]

09-28-2002, 01:41 AM	#4
pyros46290 Registered User Age: 25 Join Date: Sep 2002 Posts: 1,636 Location: danville, ca User is: OffLine	didnt some of the 1st gen blazer 4x4s come with electric lockers?
	[Reply w/Quote]

09-30-2002, 01:15 AM	#5
Alanky Another V8 Member Age: 23 Join Date: Jul 2002 Posts: 459 Location: Louisville, Ky User is: OffLine	Mine says GQ1 :confused: I have been to a few places and nobody seems to know my gear ratio, So I guess I'm an odd ball. I may be looking at the wrong thing? :confused: but I doubt it. If anyone knows what I have let me know! It is a 1984 S-10 Sport. Im thinking it may be 4:10 or something around there, because it turns VERY high RPMS and gets horrible Gas milage with the V8.
	[Reply w/Quote]


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10-09-2002, 12:18 AM	#6
pyros46290 Registered User Age: 25 Join Date: Sep 2002 Posts: 1,636 Location: danville, ca User is: OffLine	note to self: transfer case ratio is stamped onto a tag that is on the back of the transfer case (case ratio is 2.72) now i just need to know my axle ratios......
	[Reply w/Quote]

10-15-2002, 07:38 PM	#7
2LO4U Big Dick Daddy Join Date: Jun 2002 Posts: 259 Location: - Arlington, Texas - User is: OffLine	i have the g80 code... and I have a straight up locker. I had to take it out cause I fragged a few teeth off my pinion. But it is no doubt a locker and now a limited slip. JJ
	[Reply w/Quote]

10-16-2002, 04:37 AM	#8
DoubleDown ZQ8 2001 Age: 26 Join Date: Aug 2001 Posts: 909 Location: Vegas User is: OffLine	Quote: Originally posted by Flamed 98 ...because they don't know the diffrence you're right, you dont know the difference. Quote: Differential, locking rear (not available with Vortec 2200 L4 engine) http://www.chevrolet.com/s10/library...ex_chassis.htm
	[Reply w/Quote]

10-19-2002, 07:35 AM	#9
badassbrad 3M 9l3H Age: 61 Join Date: Jun 2002 Posts: 439 Location: User is: OffLine	www.smokemup.com
	[Reply w/Quote]

11-21-2002, 12:08 AM	#10
RedSpeck_09 weatherman Age: 24 Join Date: Jan 2002 Posts: 2,203 Location: pensacola/tallahassee User is: OffLine	i just checked my beater and its says GT5. that just doesn't make sense to me. a 4 banger with a 4:10 ratio? its a 95 2.2 5 speed. can anybody tell me about this?
	[Reply w/Quote]

11-26-2002, 02:40 PM	#11
DoubleDown ZQ8 2001 Age: 26 Join Date: Aug 2001 Posts: 909 Location: Vegas User is: OffLine	that is correct. they need to use the low gear ratio to multiply the little amount of torque the 4cyl puts out. damn near every s10 with the 4cyl and auto tranny has 4.10 rear ratio.
	[Reply w/Quote]

11-29-2002, 10:58 AM	#12
boggs Registered User Join Date: Nov 2002 Posts: 125 Location: User is: OffLine	Quote: Originally posted by Alanky Mine says GQ1 :confused: I have been to a few places and nobody seems to know my gear ratio, So I guess I'm an odd ball. I may be looking at the wrong thing? :confused: but I doubt it. If anyone knows what I have let me know! It is a 1984 S-10 Sport. Im thinking it may be 4:10 or something around there, because it turns VERY high RPMS and gets horrible Gas milage with the V8. G80 = LIMITED SLIP DIFF 2.73 = GU2 3.08 = GU4 3.42 = GU6 3.73 = GT4, GQ1 4.10 = GT5
	[Reply w/Quote]

11-29-2002, 11:24 AM	#13
babys10 second dime around Age: 27 Join Date: Oct 2002 Posts: 952 Location: sylmar, california User is: OffLine	i know there are treads about this but im a dumb ass what do i need to do or should do to get better traction i have 95 4.3tbi 5 speed GU4
	[Reply w/Quote]

11-30-2002, 11:56 AM	#14
gmc-xpress "AfterHours Fabrication" Age: 24 Join Date: Nov 2002 Posts: 549 Location: CeNtRaL JeRsEy User is: OffLine	OKAY THIS IS WAT IS SAW INMY GLOVE BOX BY THE RPO CODE......THERE IS NO G80 IN THERE FOR THE POSI REAR....BUT Y AROUND TURNS AND IN THE RAIN AND ON DIRT DO I MOST OF THE TIME GET 2 TIRES........AND WHERE IS THE WEB SITE OR PHNE # TO GET A LOCKER AND HOW MUCH......THANKS AGIAN GUYS
	[Reply w/Quote]

12-16-2002, 07:05 AM	#15
Beasthead2 Registered User Join Date: Dec 2002 Posts: 16 Location: User is: OffLine	Me and the OEM's consider the g80 gov-lock a locker. The industry may sometimes use the term "limited slip" when selling you a car, to mean any kind of traction device in general. Be it a locker, limited slip, or computer traction control. The true term evolved to mean non locking differentials, with friction plates to "limit" slip instead of prevent slip. A limited slip gives alot of resistance to differential action at all speeds and at all times, and never locks. This leaves the definition of locker to mean a device that completely locks the diff at some time. The g80 gov lock locks completely 100% when it does lock. The only reason an aftermarket locker is different is because they lock with any slight difference in torque between the wheels, while the gov-lock locks due to a significant difference in wheel speed between the two wheels. So the gov lock will spin some before it locks. I think the gov lock is supposed to give a little resistance before it locks with friction plates, but not nearly as much as a limited slip. Mine has worn down to where it has no resistance at all until it locks completely. Call it "inferior","not a locker", "a posi", call it whatever you want'; but it is simply bad English to call this, strictly, a "limited slip" Unless you're saying "limited slip" to include all lockers because it is true that something that completely prevents slip also limits it. But thats like saying a full glass is also 1/2 full because it has 1/2 full plus the other 2nd half.
	[Reply w/Quote]

12-21-2002, 12:57 AM	#16
Black Dragon Never Satisfied Age: 30 Join Date: Jan 2002 Posts: 178 Location: Jackson,DirtySouth User is: OffLine	which trucks usually come with 3.42 from the factory ????
	[Reply w/Quote]

12-24-2002, 11:09 AM	#17
F-i-Z-i-T Its comin along Age: 23 Join Date: Jul 2002 Posts: 886 Location: Orlando, FL User is: OffLine	I have a 94 4.3L TBI with a 2.73!! GU2
	[Reply w/Quote]

01-20-2003, 09:24 AM	#18
ZR1 S10 Road Race/Auto X S10 Age: 24 Join Date: Dec 2002 Posts: 3,827 Location: South Milwaukee, WI. User is: OffLine	What'dya get in first like 45mph lol
	[Reply w/Quote]

01-21-2003, 08:19 PM	#19
Dave Registered User Join Date: Nov 2002 Posts: 15 Location: User is: OffLine	Black Dragon: I just picked up a rear axle from a 87 GMC S15 4x4, the codes in the glove box were GU6 and G80. I understand this means 3:42's Posi. I believe this is a factory option in most of these trucks. I just got this from the scrapyard. Hope this helps Dave
	[Reply w/Quote]

01-24-2003, 11:22 AM	#20
sonomaracer mean green machine Join Date: Jan 2003 Posts: 91 Location: northeast mississippi User is: OffLine	i've got 3.42's with a torsen LSD.:guitar:
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01-24-2003, 07:03 PM	#21
MyXtreme2000 Registered User Age: 45 Join Date: Oct 2002 Posts: 41 Location: all alone in the world User is: OffLine	My Old 94SS and my 00 Xtreme both with V6 and Auto came with 3:42.1 from the factory
	[Reply w/Quote]

01-30-2003, 12:35 PM	#22
meangreen9c1 Registered User Join Date: Dec 2002 Posts: 28 Location: Tampa User is: OffLine	Don't all 2.2s come with the 4.10s?
	[Reply w/Quote]

02-06-2003, 02:32 AM	#23
pnut420 Registered User Age: 26 Join Date: Feb 2003 Posts: 263 Location: Danville.Ca User is: OffLine	Quote: Originally posted by MyXtreme2000 My Old 94SS and my 00 Xtreme both with V6 and Auto came with 3:42.1 from the factory I have a 2001 sonoma V6 with 3:42:1 with limited slip, It spins both tires on the pavement all the time, but a few times in the mud and snow only one tire was really spinning good
	[Reply w/Quote]

02-06-2003, 11:48 AM	#24
DoubleDown ZQ8 2001 Age: 26 Join Date: Aug 2001 Posts: 909 Location: Vegas User is: OffLine	Quote: Originally posted by meangreen9c1 Don't all 2.2s come with the 4.10s? no, many come with 3.73s also.
	[Reply w/Quote]

02-07-2003, 01:30 PM	#25
wolfmangk CHANGE YOUR EMAIL ADDRESS Age: 29 Join Date: Sep 2002 Posts: 2,919 Location: User is: OffLine	The higher the ratio the better the gas mileage, correct?
	[Reply w/Quote]

02-08-2003, 01:07 AM	#26
DoubleDown ZQ8 2001 Age: 26 Join Date: Aug 2001 Posts: 909 Location: Vegas User is: OffLine	taller gears (lower numbers) are better for gas mileage. 3.08 gets better mileage than 4.56
	[Reply w/Quote]

02-09-2003, 02:08 PM	#27
DimeTime CHANGE YOUR EMAIL ADDRESS Age: 23 Join Date: Feb 2003 Posts: 1,980 Location: Tallahassee, Florida User is: OffLine	I have a 01 w/ 4.10, and i was wondering how much of a difference it makes in acceleration, and in gas milage, if someone has changed from 4.10 to 4.56
	[Reply w/Quote]

02-26-2003, 04:38 PM	#28
2,5 to LS1 Registered User Join Date: Feb 2003 Posts: 16 Location: Florida User is: OffLine	Alanky i too have that gq1 , need to get more info cause i just got the pick up on the weekend its a 91 5speed with a 2,5 tbi! can you post the next code after that...i have a scratch there so hard reading....(??4) the 4 is for sure the first digits are ??
	[Reply w/Quote]

03-01-2003, 01:53 PM	#29
babys10 second dime around Age: 27 Join Date: Oct 2002 Posts: 952 Location: sylmar, california User is: OffLine	ok i just bought 03 s10 v6 code say GU6 G80 that means i have 3.42 with a locker right??
	[Reply w/Quote]

03-01-2003, 04:18 PM	#30
SSsonoma43 Now own a Grand Am GT Age: 25 Join Date: Feb 2003 Posts: 304 Location: Milwaukee, WI User is: OffLine	Thats right.
	[Reply w/Quote]

03-03-2003, 10:42 AM	#31
babys10 second dime around Age: 27 Join Date: Oct 2002 Posts: 952 Location: sylmar, california User is: OffLine	thats f*ckin cool huh??
	[Reply w/Quote]

03-14-2003, 11:28 AM	#32
wolfmangk CHANGE YOUR EMAIL ADDRESS Age: 29 Join Date: Sep 2002 Posts: 2,919 Location: User is: OffLine	Quote: Originally posted by Black Dragon which trucks usually come with 3.42 from the factory ???? Mine! :cry: :cry: I want better mileage!
	[Reply w/Quote]

03-14-2003, 02:05 PM	#33
91sdime Vortec 350 s10 Age: 28 Join Date: Mar 2003 Posts: 836 Location: dirty south, NC User is: OffLine	3.08 with an open rear..that sucks. I wonder if I can find a quaife type diff for my truck. Anyone know if a company makes a lsd with all gears..(no clutches or cones to wear out)?
	[Reply w/Quote]

03-15-2003, 10:07 PM	#34
ZackaryMac Rattlin Bog Join Date: Feb 2003 Posts: 99 Location: Nova Scotia User is: OffLine	My 1991 2wd Sonoma with 4.3 TBI, 4spd auto has a 3.42 in the rear (for now..heh heh).
	[Reply w/Quote]