Simple way to know if 2007 Tahoe has a 3.73 rear-axle ratio? - Chevrolet Forum - Chevy Enthusiasts Forums
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Simple way to know if 2007 Tahoe has a 3.73 rear-axle ratio?


raydf's Avatar
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Join Date: Jan 2018
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February 12th, 2018, 4:17 PM   #1  
Simple way to know if 2007 Tahoe has a 3.73 rear-axle ratio?

I wonder if you guys know of a simple way to determine if a used 2007 Tahoe I'm looking at to buy has a 3.73 rear-axle ratio or not? To me this issue is important to determine the towing capacity of the vehicle (which would be about 7,200 with the 3.73 ratio.) I checked and the VIN search tool posted above in "Tools" doesn't specify the rear-axle ratio (or I missed it!)

Thanks!

 
kevinkpk's Avatar
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February 12th, 2018, 8:56 PM   #2  
Well, yea, especially with a 4wd. Manual way is to count the helical gears on the drive, then the pinon, then divide the two.

 
tech2's Avatar
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February 12th, 2018, 9:28 PM   #3  
find out the rpo build code for a 3.73 axle....then check it against the build sheet in the glove box of the vehicle in question.
GM RPO Axle Code List | GM Axle Gear Ratio Lookup

 
raydf's Avatar
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February 13th, 2018, 4:41 AM   #4  
Hey! Thank you very much -- that should indeed work. Have a nice day!

(By the way, I completely ignored the "B-pillar" codes thing! I just went to my 2003 GM vehicle and I did find the label with the bunch of codes, even though in my car it's in the rear door -- wonderful stuff!)

Posted By: tech2 find out the rpo build code for a 3.73 axle....then check it against the build sheet in the glove box of the vehicle in question.
GM RPO Axle Code List GM Axle Gear Ratio Lookup


Last edited by raydf; February 13th, 2018 at 7:40 AM.
 
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