The speedometer can be removed torn apart and lubed and that will usually fix it. The dynaflow- well there is a saying: if your dynaflow is not leaking-there is one of two problems 1) you foregot to put oil in it or 2) it has all leaked out. I know that is not much help. My 52 does not leak when I drive it everyday but let it sit, it just runs out the speedoshaft, the tale shaft and down the torque tube into the differential. I drilled an 1/8 inch hole near the end of the torque tube to keep the oil from contaminating the rear diff. I catch the oil, filter it and pour it back in before I drive it.
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