08-28-2017, 06:15 PM | #1 |
Member
Join Date: Sep 2015
Posts: 38
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rear end play
how much free play should there be in the rear end when you turn the driveshaft by hand? This is a 56 ford standard rear end.
How much should the driveshaft move before you feel the rear end engage? |
08-29-2017, 08:18 AM | #2 |
Senior Member
Join Date: May 2010
Location: St. Michael, Minnesota
Posts: 1,713
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Re: rear end play
When new, there was very little play. Maybe 1/4 to 3/8 inch turn of the driveshaft. If you have more, and have no noise, leave it. Change oil and go heavy. 90/140 was my choice, but it was not used in a very cold area.
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08-30-2017, 08:37 AM | #3 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,431
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Re: rear end play
The back lash was set at the .003" to .008" range with the bearing preload within specs. It should remain in this range until the bearings & gear teeth are worn far enough to eliminate the preload and normal backlash. After that, the slop gets worse until it starts making noise due to too much play. If you want to keep running this rear axle you should take steps to see what kind of play and wear it has in there. Parts for these old buggers are getting scarce but if the damage is already too far gone, a person might consider changing it out to something easier to get parts for.
These axle assemblies were the precursor to the 9-inch. The center section generally has to be removed to check them out. |
09-05-2017, 06:14 AM | #4 |
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Join Date: Jul 2012
Location: Orange Park, Fl
Posts: 406
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Re: rear end play
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