how to determine axle ratio?

175

Asked by Dec 07, 2009 at 04:15 AM about the 2003 Chevrolet Suburban

Question type: General

How do you determine the axle ratio installed (stock) on a 2003 Suburban 4x4 (1500)? I was looking at tow ratings and noticed there were two listings provided for my vehicle (3.73 & 4.10, if I remember correctly).

9 Answers

125

Jack up the rear end of the vehicle, Put a mark on the Drive Shaft, Spin the Rear wheel by hand one time and count how many times the drive shaft makes complete rotation. ex. If you spin the wheel one time and the drive shaft makes 3 & 3/4 spins then it is a 3.73. if it makes a little over 4 spins then its a 4.10. I may have it ass backwards to be honest with you though. it may be how many times the wheel spins for one drive shaft rotation. I hope this helps

6 of 6 people found this helpful.
175

Thanks Ricky... someone mentioned about RPO codes stamped in the glovebox that determines the axle ratio from the factory on a late 90's Chevy... I wonder if that applies as well to my '03... I'll check if there's any coding stamped in the glove box in the mornin'... I appreciate your quick reply.

4 of 4 people found this helpful.
175

99'Heartbeat posted this on the GMTruckClub forums: http://www.compnine.com/vid.php type in your VIN and it'll spit out all the RPO codes for your vehicle(s). I guess I've got myself a 3.73 axle ratio based on RPO code: GT4 w/ a 7200lb GVWR.

6 of 6 people found this helpful.
7,135

Somewhere on the driver's door or body area of your vehicle you will find a sticker that has the VIN across the top, GVR, tire size, and other information on it. At the bottom of that sticker it will show an "axle code". Take that information with the VIN number to any dealership and they can get the gear ratio and tell you what type of rear axle is in the vehicle. SOMETIMES, if you crawl underneath the truck, there will be a tag on the rear axle cover (held on by a bolt) and the gear ratio will be stamped into the metal tag.

6 of 6 people found this helpful.
110

The codes are on the sticker inside the glove box door.

11 of 11 people found this helpful.

usually a tab with the ratio on one of the bolts on the inspection plate on the rear end, or see how many times you have to turn the driveshaft to get a full rotation of the wheels. (3.73 turns driveshat/1 rotation of wheels=3.73/1 or 3.73.

How do I line the drive,shaft and rear end on 2000 chevy z71

I need to ask a question

What # gear is my truck chevy suburban 1997 suburban 1500 2 wheel drive i know 3.42

Your Answer

Suburban

Looking for a Used Suburban in your area?

CarGurus has 21,841 nationwide Suburban listings starting at $1,999.

ZIP:

Chevrolet Suburban Experts

  • #1
    Andrew Olsen
    Reputation
    1,030
  • #2
    Eric Fritz
    Reputation
    910
  • #3
    Neal Turner
    Reputation
    900
View All

Related Models For Sale

Used GMC Yukon XL
245 Great Deals out of 13,679 listings starting at $1,495
Used Chevrolet Tahoe
672 Great Deals out of 39,450 listings starting at $1,000
Used GMC Yukon
396 Great Deals out of 21,430 listings starting at $1,495
Used Ford Expedition
364 Great Deals out of 19,274 listings starting at $1,295
Used Cadillac Escalade ESV
84 Great Deals out of 5,301 listings starting at $3,990
Used Cadillac Escalade
224 Great Deals out of 11,175 listings starting at $2,000
Used Chevrolet Silverado 1500
2,067 Great Deals out of 165,774 listings starting at $1,900
Used Chevrolet Silverado 2500HD
307 Great Deals out of 28,923 listings starting at $3,550
Used Ford F-150
2,283 Great Deals out of 183,736 listings starting at $699
Used Toyota Sequoia
122 Great Deals out of 5,333 listings starting at $2,499
Used Lincoln Navigator
86 Great Deals out of 4,509 listings starting at $1,900
Used Dodge Durango
268 Great Deals out of 21,342 listings starting at $2,495
Used Nissan Armada
133 Great Deals out of 7,808 listings starting at $2,995
Used Ford Explorer
835 Great Deals out of 63,568 listings starting at $1,000
Used Ford Excursion
8 Great Deals out of 800 listings starting at $4,185

Used Cars For Sale

2017 Chevrolet Suburban For Sale
57 Great Deals out of 11,170 listings starting at $42,430
2016 Chevrolet Suburban For Sale
48 Great Deals out of 1,361 listings starting at $35,875
2015 Chevrolet Suburban For Sale
24 Great Deals out of 1,341 listings starting at $22,995
2014 Chevrolet Suburban For Sale
15 Great Deals out of 514 listings starting at $18,995
2013 Chevrolet Suburban For Sale
20 Great Deals out of 543 listings starting at $11,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.