Hola All
Since it has been a while since our cars where driven from the assembly
plant and an customer has driven the same vehicle from the dealers place of
business, many things could have happened. Knowing this is an reason
to just pick up the rear of the car in all the safe manners so that nuthin
happens in a bad way to you, or the car. Now that you have the rear wheels
off the ground with no brake and in "N" if it has Park, hand move the tire/wheel
on one side. If the other side moves in the same direction you have
Sure-Grip. If the other side goes the other direction from what you are
going, it is not Sure-Grip.
I say to double check the vehicle this way since the original vehicle could
have been enhanced or the original vehicle could have been repaired in an lessor
manner.
The 1959 and closely followed years may have the 2.93 ratio'd
Sure-Grip. By 1963 it was 3.23 with any car with Sure-Grip. When
Imperials started using the 9.25 diam rear differential ( 12 bolt rear cover )
the sure-Grip ratio was 3.21:1 . If your Imperial is of these years and
has the factory tow package it will have this same ratio, but not always the
Sure-Grip.
Will the differential ( pumpkin ) inter-change from non to Sure-grip
.. Yes. Will the complete non Sure-Grip carrier switch to the
Sure-Grip version since I have one in the closet... yes. At home the
complete carrier can be ex-changed in about an hour with hand tools and an
helping person. If any of this is done, it is a good reason to purchase a
new rear flex brake line.
Uncle Rodger & Aunt Gabby
COS
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