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Thread: Z71 axle ratio
04-15-2009, 12:37 PM #1
Z71 axle ratio
I recently purchased a 98 Z71 5.7L or 350 to all us non metric old guys, I am pretty sure that the Z71's came standard with a 3.73 gear ratio, is there anyway to check this. the previous owner wasn't much of a gearhead and he basically has no idea.
I know on fords the axle code is located on the vin. and you can check the code online.
Am I able to do this for a chevy?1998 Chevy Z71 Ext. Cab
2010 Ford Fusion SE
2001 Yamaha Kodiak
04-15-2009, 03:49 PM #2
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You can find out by looking at the RPO sticker in your glovebox that has all the codes for the build of your truck. As a suggestion you may take a picture of the sticker with a digital camera and load it on your computer to blow it up then do a Google search for the GM RPO code list for the definitions. Here is a SITE for those codes.Darcy
2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.
04-15-2009, 06:37 PM #3
look on the rear diff. there should be a little metal tag that is being held on between two of the bolts holding the diff cover on. that tag should say the ratio on itPETE
95 GMC Sierra 2500
3" Body Lift, 33" Goodyear MTR's
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1999 Jeep Cherokee, 3" Rustys lift, 33" BFG MT's, locked, armored: Rolled :(
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04-16-2009, 12:35 PM #4
Thanks for the info, I'll take a look
04-24-2009, 10:41 PM #5
Got home finally from out of town, checked the codes its a G80 with a 3.73 ratio. Pretty excited about that.
04-24-2009, 11:00 PM #6
I have the list in pdf format if you ever want it for use offline
http://www.drzero.org/GMC/GM RPO Master List.pdfMy trucks!
1996 GMC Suburban SLT
1997 GMC Yukon SLT
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