If both rear tires are rotating the same direction, it is one revolution.
If one rear tire is prevented from rotating, it is two revolutions.
If one tire is held and the other tire turns, the spider gear in
the differential causes the drive shaft to rotate at half the speed
it normally would. This works the other way too. If you brake one
wheel the other one will spin twice as fast. Don't try this at home.
Don't forget to put the transmission in neutral.
Bruce Kettunen
57 3200
Mt. Iron, MN
At Tuesday, 4 November 2003, you wrote:
>The prior post from Roger Gleason, described basically the same
procedure,
>but said rotate the tire two revolutions. This wasn't my original
question,
>but I would like to know how to do it for future reference. Which is
>correct? Rotate the tire one or two revolutions?
>
>Doug
>
>-----Original Message-----
>From: owner-oletrucks@autox.team.net [mailto:owner-oletrucks@autox.
team.net]
>On Behalf Of Wayne Osborne
>Sent: Tuesday, November 04, 2003 10:51 AM
>To: Antonio R. Tijerino; Spinningroach@aol.com; daveshier@hotmail.com;
>oletrucks@autox.team.net
>Subject: Re: [oletrucks] Rear end ratio
>
>Jack up both sides of the rear of the truck, place a tape or chalk
mark on
>the 12 oclock position of the tire. Youll also note the the position
of the
>drive shaft, place a reference mark, or visually note a location
that you
>can count the revolutions of it. Turn the tire one full revolution and
>count how may times the drive shaft rotates. Although you quickly
be able
>to distinquish between a 4:11 (one tire revolution equal 4.11 turns
of the
>shaft) and say a 2:73. But be hard to tell between a more closer
ration.
>Best way is to remove the cover, count the pinion and ring gear
teeth and
>divide the 2. There is generally a code stamped on it that can be
run to
>indicate the ratio---of couse that would be the original gear set..
>Good luck --wayne
>
>At 07:07 AM 11/4/03 -0700, Antonio R. Tijerino wrote:
>>A while back someone suggested that in order to calculate the rear end
>ratio
>>you raise the truck on hack stands and then turn the wheel and
count the
>>number of turns on the driveline. How does this work, I have a
friend that
>>is trying to do this and I can't remember exactly how this done.
>>
>>Thanks,
>>
>>Antonio
>>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
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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