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Rear-end Gear Ratios

In a few months, I will be in the market for a new (to me) vehicle. At this point, I am thinking late model Silverado. One of the duties of this vehicle will be towing a 24' travel trailer that I acquired this summer.

After referencing a number of towing guides, I've noticed that there is a widely varying degree of towing capacity among trucks with similarly sized engines, but different rear-end gear ratios.

My question is this: When considering a pre-owned vehicle, is there any reasonably easy way to determine a vehicle's rear-end gear ratio?

Thanks,

Mark

Reply to
Phil McCracken
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Well for GM vehicles it's easy. Just look at the RPO sheet in the glove compartment. The gear ratio, brake option and tire size will all be on it. You just need to go online and grab the codes and print a reference card for you to carry. This one covers 99% of the codes.

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GT4 1976 2005 AXLE,REAR,3.73 RATIO GT5 1976 2005 AXLE,REAR,4.10 RATIO GU2 1976 2004 AXLE,REAR,2.73 RATIO GU4 1976 2005 AXLE,REAR,3.08 RATIO GU5 1976 2004 AXLE,REAR,3.23 RATIO GU6 1976 2005 AXLE,REAR,3.42 RATIO G80 1976 2005 AXLE,REAR,POSITRACTION G86 1990 2002 AXLE,REAR,LIMITED SLIP G90 1997 2001 AXLE REAR 3.15 RATIO HC4 1976 2003 AXLE,REAR,4.56 RATIO HC7 1976 2002 AXLE,REAR,5.13 RATIO

OR write down the VIN and have a dealer look it up.

Reply to
Steve W.

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