Chuck, I did a quick check of the main case and tailshaft housing casting numbers and they came back as correct for 1948-54 Commercial 3 speed transmissions. Your pictured output shaft rear yoke looks to be for a 3/4 ton (3600) truck - looks same as this 3/4 ton yoke/u-joint kit which is different than the ones used by both Chevy trucks and cars of the same years.

Check the Shop Manual for how to disassemble/remove the yoke/u-joint currently there. Then you should be able (I think) to transfer your original yoke/u-joint set to this transmission. Other Bolters with more experience will surely come along to provide more info. wink


~ Dan
1951 Chevy 3 window 3100
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