Sure Grip Test Proceedure ???

[John Hammond <426_maxwedge@xxxxxxxxxxx>]

Some time ago I remeber reading a method to determine if a 8-3/4" was a 
SureGrip or not.  The car had to be on stands and it required two people to 
do it....One held a wheel and the other turned one backwards or something 
like that.  If anybody can outline this proceedure correctly and in detail I 
would much appreciate the info.  I don't know if it has any bearing in the 
results, but the rear under my '64 wagon in question, is supposed to be from 
a '70 B-Body.  I'm really confused on this at the moment: on asphalt, the 
dark mark left from the passenger side would indicte an open rear....on 
concrete, it leaves a very uniform and consistant amount of mark in a Pair 
of tracks.  During the the wheel alignment, the tech said he felt a 
vibration in the rear, sort of a chattering resistance through part of a 
single wheel rotation.  He thinks this indicates a bad carrier bearing.  The 
leveling beams for the alignment rack were on both rear wheels when this 
vibration was felt. Could this have been a SG unit just indexing normally? I 
installed the rear to replace the original '64 piece. We checked the center 
section of the supposed '70 3.23 to find it was a 2.74, (or something close 
to that). We then installed another 3.23 and threw it under the wagon.  That 
was soooo many years ago I don't remeber the details on the chunk we did 
install.  I really hope somebody here can shed some light on this because I 
don't know whether to be delighted that I have a SureGrip or really worried 
that the rear is about shot......help!

thanks in advance to any and all who reply,
John Hammond


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