The Most Devastating Engineering Miscue Found in Early A-Bodies

my68barracuda said
Not exactly only an A body issue. Does anyone have information on why Chrysler did three different versions of the 8.75 center section, 741, 742, 489?
There is just enough difference between the three to make the gear sets non interchangeable, but not enough of a difference to make one truly superior.
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when it was implemented in ‘59 or so, there wasn’t the high powered driveline combos that started showing up in ‘62. I’m sure many a neutral drop of the early Max Wedge cars necessitated the increase in size of the pinion shaft and carrier bearings.