What auto trans and rear end
Thread Starter
Melting Slicks
Joined: Feb 2009
Posts: 2,072
Likes: 1
From: Oklahoma City OK
St. Jude '10
What auto trans and rear end
do I have. With a 93 coupe with no special packages. I don't have the vin with me if needed but could get it tonite. Also is there any way to know if the gears have been changed. Can you count the turns on the drive shaft vs rotations on a wheel?
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
The stock 93 automatic has a 4L60 transmission and a dana 36 rear axle, standard ratio is 2.59, if it has the performance axle ratio it will be 3.07. If the gears have been changed your method of counting driveshaft rotation and comparing to wheel rotation will tell you.
Thread Starter
Melting Slicks
Joined: Feb 2009
Posts: 2,072
Likes: 1
From: Oklahoma City OK
St. Jude '10
OK, After getting home and looking in the FSM, the only auto trans they have listed is the 4L60. All along I thought it was the 700R4 but wasn't sure. So, is it safe to believe that if it is the only one in the book then it must be the right one? I found in the manual where to look for the gear ratio (assuming it hasn't been changed) on the case. They list several ratios in the book.
Race Director
Joined: Aug 2000
Posts: 14,130
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Cruise-In II Veteran
There should be a white sticker with a bunch of codes either in the glove box or arm rest door,or sometimes in the rear trunk storage doors.There are codes there you can look at and post here.
On older cars,I believe the codes for a 700R4 was the MD8 and a performance rear axle will say G92 or G44.
Can you find anything in your car that has codes like this?Thats a start to figure out what your car came with.
On older cars,I believe the codes for a 700R4 was the MD8 and a performance rear axle will say G92 or G44.
Can you find anything in your car that has codes like this?Thats a start to figure out what your car came with.
Team Owner
Joined: Dec 2007
Posts: 20,974
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4L60= 700 r4
4l60E is in the 94 and up. IIRC they can be computer tuned
if your car feels like a dog off the line, or at like 65 it is only reving like 18 2k tou probably have 2.59
I have had both, and there is a big difference in the fun factor
also rpo codes are probably under the center console door, or in glove box.
4l60E is in the 94 and up. IIRC they can be computer tuned
if your car feels like a dog off the line, or at like 65 it is only reving like 18 2k tou probably have 2.59
I have had both, and there is a big difference in the fun factor
also rpo codes are probably under the center console door, or in glove box.
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
OK, After getting home and looking in the FSM, the only auto trans they have listed is the 4L60. All along I thought it was the 700R4 but wasn't sure. So, is it safe to believe that if it is the only one in the book then it must be the right one? I found in the manual where to look for the gear ratio (assuming it hasn't been changed) on the case. They list several ratios in the book.
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Le Mans Master
Joined: Jun 2009
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From: Tabernacle NJ
St. Jude Donor '10-'11-'12-'13
Pro
Joined: Feb 2006
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From: powhatan va.
i had a 700r4 in my 93 but it was the early 93, the late 93s have the 4l60. an easy way to tell if you have an early or a late 93 is to look at the belt, if its double sided grooved its an early if the grooves are only on one side its the late 93.
Thread Starter
Melting Slicks
Joined: Feb 2009
Posts: 2,072
Likes: 1
From: Oklahoma City OK
St. Jude '10
According to Wiki:
The Hydramatic 700R4 was introduced in 1982 for use in Chevrolet/GMC vehicles.
In 1990 the 700R4 was renamed the 4L60.
1992 was the last year of wide spread usage of the 700R4 (4L60).
1993 Camaro, Corvette & Typhoon were equipped with the last production 700R4's, also the last design change of the 700R4 with an added checkball to the valve body.
In 1992 electronic controls were added and it became the 4L60-E. The 4L60E went into service in trucks, vans, and SUVs in 1993 (for the record, some HD trucks had the 4L60) and in all RWD passenger cars (Corvette, F and B/D bodies) in 1994.
The Hydramatic 700R4 was introduced in 1982 for use in Chevrolet/GMC vehicles.
In 1990 the 700R4 was renamed the 4L60.
1992 was the last year of wide spread usage of the 700R4 (4L60).
1993 Camaro, Corvette & Typhoon were equipped with the last production 700R4's, also the last design change of the 700R4 with an added checkball to the valve body.
In 1992 electronic controls were added and it became the 4L60-E. The 4L60E went into service in trucks, vans, and SUVs in 1993 (for the record, some HD trucks had the 4L60) and in all RWD passenger cars (Corvette, F and B/D bodies) in 1994.
Thread Starter
Melting Slicks
Joined: Feb 2009
Posts: 2,072
Likes: 1
From: Oklahoma City OK
St. Jude '10
GM1 it is.
Good news: I can still get an easy mod going to a better gear.
Bad news: I haven't found anyone giving them away.
Thanks again for all of the help
Good news: I can still get an easy mod going to a better gear.
Bad news: I haven't found anyone giving them away.
Thanks again for all of the help
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
Thread Starter
Melting Slicks
Joined: Feb 2009
Posts: 2,072
Likes: 1
From: Oklahoma City OK
St. Jude '10
Racer
Joined: May 2009
Posts: 421
Likes: 2
From: van buren ar
imo something in the 3.5x range would serve you well.im going with 3.89 myself,and i still plan on several 3 hour trips every year.do you think that the 2.59 gears make your car is alot slower than it should be?i feel that way about mine.i test drove a 87 iroc a4 with 62 miles on the clock and i promise it would have smoked my 92 c-4,at least for 1320ft.
Last edited by c-4 lhozwalte; Jul 24, 2009 at 11:38 PM.
Burning Brakes
Joined: May 2009
Posts: 1,014
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From: Ft Wayne IN
D36 0r D44
imo something in the 3.5x range would serve you well.im going with 3.89 myself,and i still plan on several 3 hour trips every year.do you think that the 2.59 gears make your car is alot slower than it should be?i feel that way about mine.i test drove a 87 iroc a4 with 62 miles on the clock and i promise it would have smoked my 92 c-4,at least for 1320ft.
I also am going to do a gear swap and tourqe conv. change. I have changed gears before and had to redo them because I played it cautous and should have went lower. I don't think you will notice enough of a diff to spend the money and time going to 3:07's, maybe a couple hundred rpm's at highway speed. go with the 3;53's and you will be much happier unless you are only interested in top end speeds. Just my 2 cents!
