The yoke (the part of the driveshaft that slides into the trans) will wear on the spline inside the yoke, also the seal will wear on the outside of the yoke (the shiny spot) it does not take much, can't always feel it with your finger nail, also pay attention to the seal, some have a hole in the rubber and it goes at the top (12 o'clock position) and coat the outside of the yoke with trans fluid.
Note: just think how many revolutions that driveshaft makes per one tire rotation, a 3.73 rear gear, that's almost 4 drive shaft turns per 1 tire rotation, a 26" tire turns 7 76.5 times per mile x 3.73= 2,896.345 times.
Now just for fun multiply that by the miles on your car, you can plug in your own actual rear gear and tire height just for fun, add to that the yoke sliding on the spline as the rear end moves up and down and you get the idea, it's a lot slipping and sliding all the while spinning an astonishing amount of times.
I don't guarantee the math but you get the idea.
Note: just think how many revolutions that driveshaft makes per one tire rotation, a 3.73 rear gear, that's almost 4 drive shaft turns per 1 tire rotation, a 26" tire turns 7 76.5 times per mile x 3.73= 2,896.345 times.
Now just for fun multiply that by the miles on your car, you can plug in your own actual rear gear and tire height just for fun, add to that the yoke sliding on the spline as the rear end moves up and down and you get the idea, it's a lot slipping and sliding all the while spinning an astonishing amount of times.
I don't guarantee the math but you get the idea.
ing it up then have to beat someone else up.
