A-833 OD in Aspen... not the right one?

HemiEd said

Mine use the 727 yolk. They are date coded 75 and 76, and one has the shifter mount on it, and they use the 4.780 bearing retainer.

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Then they are not OD transmissions unless the bearing retainers have been changed or turned down. The only size bearing retainer the OD came with was 5.125".

Read here about the 4 speed overdrive transmissions.

http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm