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Re: Rear Axle Ratio Charts For 1967 - 1972 GM Trucks
I purchased a replacement rear end that had the following codes:
HA 05 06 W = 1967-69 3.73 May 6th
D 17 8 = April 17th, 1968
The odd thing is that I pulled it out of a 1967 Suburban. I'm guessing it wasn't the original rear end though due to the date code on the differential casting. The cool thing is that it is a reasonable date for my '68 truck that was built in the summer of '68.
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