Re: Rear-end Gear Ratios

#1

Phil McCracken wrote:

Quote:

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

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.
http://forums.off-road.com/gm-standard-ifs-trucks-suv-s/183040-download-gm-rpo-list-here.html

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.

--
Steve W.
Near Cooperstown, New York

Life is not like a box of chocolates
it's more like a jar of jalapenos-
what you do today could burn your ass tomorrow!

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Re: Rear-end Gear Ratios

4x4 Chevy/GMC Trucks 4x4 Chevy/GMC Trucks Discussions (alt.autos.4x4.chevy-trucks)

Re: Rear-end Gear Ratios - 09-12-2008 , 03:05 PM