Chris
In 1967 the 8 3/4 rear axle assembly was offered in the 2.9 ratio if
nothing was said with your Imperial. If the original order had the
Sure-Grip, the Towing Package or Hi-Per 440 package with 375 Horse Power engine,
then it would have had the 3.2 ratio in your Imperial. This is from the
1967 FSM.
The 1967 year was also the first official year of the ending of the 8 3/4
rear axle assembly and the start of the beginning ( fazing in ) of the 9 1/4
axle assembly's era. This information is also in the 1967 FSM. An
gambling person would want to speak up on an sure bet to say that you
have the older 8 3/4 unit.
The gears is the same part number if the rear axle is or is not the
Sure-Grip. For the 3.23:1 gears in the 8 3/4 unit the number from any
MoPar dealer is waiting for an phone call from you. Your local NAPA store
may even have this ratio. In the Imperial, the complete Chrysler line of
Chrysler's, the Dodge's, the Plymouths this was the favorite choice for Hi-Per,
Towing, Sure-Grip and Police Vehicles. In Dodge Vans and Pick-ups it was
the basic rear axle ratio used if nothing different was marked.
You asked if the standard Sure-Grip ratio ( 3.23:1 in 1967 Imperials )
would lessen the value of your car. No Sir it will not.
Rodger & Gabby
COS
ps
I hope I read and copied of of it correctly from the FSM
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