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Here is the yoke before putting the new u-joint in:
Carefully push the cups in after cleaning the yoke:
Make sure the new retaining ring is seated well by carefully rotating with a screwdriver:
When I walked into the auto parts store the guy behind the counter started asking me all of these questions to figure out what u-joint he needed. An old guy sitting on a chair said "369". When the younger guy finally found the part in the computer he said, "I hate it when they do that". Yes, a 68 GMC u-joint is so popular and in wide use that the old guy sitting in the chair could just call out the part number:
My current list of equivalent parts is:
The Federal Mogul Precision number is 369. I would stick with that number, it seems to be the most common. Some other numbers that seem to be similar are Spicer number 5-153x, Neapco number 1-0153, and TRW number 20049. Notice the 153 designation on the generic Chinese made part in the picture above. Really, the measurement is what counts. I'll measure some of these and put that up here.
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