Sandy & everyone else that replied to my request. Thanks!
I've got enough info to work with. I'll look the 81 dually over
tomorrow morning and see if any thing is in the glove box. If
not I'll crawl underneath and see what kind of markings are
there.
I'm hoping for a 4.10 ratio since this will be primarily a tow
vehicle for a 31' airstream trailer.
Thanks again,
Brad
http://www.141.com/chevy/53panel
On 1 May 2003 at 14:53, mr55gmc wrote:
> You wrote
> From: "Brad Kahler" <brad.kahler@141.com>
> To: <oletrucks@autox.team.net>
> Sent: Thursday, May 01, 2003 3:50 AM
> Subject: [oletrucks] diff ratio - donor rear end
>
>
> Is it possible possible to tell the diff ratio on an 81 1-ton
> dually by vin number, or some other number stamped on the
> truck?
>
> Worst case is I jack up the rear end and count revolutions but
> it sure would be nice to just find the numbers somewhere!
>
> Thanks
>
> Brad
>
> Back in that era I sold trucks - the axle ratios were primarily 3:73 or
> 4:10. Even the emission settings affected the ratios, but the little white
> tag with all the funny numbers usually inside the glove box lid should
> show a couple starting with "G" - GQ1 being a "standard axle ratio" if
> memory serves me correctly. Then there is at least one other number
> starting with G, such as GT4, which a parts man can quickly interpret. If
> there is a G80, you lucky devil, it is a locking rear axle. There are
> also numbers on the rear axle tube, passenger side, about even with the
> driveshaft entry level, that will also decode on parts. If not, pull the
> rear cover and count the teeth. Sandy Pierce Salt Lake City, Utah 55-2 GMC
> Suburban P/U oletrucks is devoted to Chevy and GM trucks built between
> 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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