Crashbox with added value
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Senior User
Joined: Oct 2017
Posts: 237
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From: Hamburg, Germany
Crashbox with added value
So, here's the "upper" shift lever pin of my 4 speed spur gear box next to the one I found inside while draining the oil:
It sat in the rear bottom corner at the drain plug. Was buried in sludge and I only found it when "examinating" that sludge with my finger....
With the inspection cover removed, luckily it seems not to have travelled much through the gears, as I found no obvious chipped teeth or coarse shavings in the oil - other than very fine flakes from former grindiing while shifting.
The lesson is, expect the unexpected in Trucks 70 years old, and take nothing for granted. And better take apart everything. I never would dare to drive the truck when this pin has just fallen into the gear box (which they very easily do!). Some previos owner or his garage mechanic thought different..... picked another one from the shelf .... and got away with it.
Although having plenty of them, I made a third one of a drill bit shaft without the wear marks.
It sat in the rear bottom corner at the drain plug. Was buried in sludge and I only found it when "examinating" that sludge with my finger....
With the inspection cover removed, luckily it seems not to have travelled much through the gears, as I found no obvious chipped teeth or coarse shavings in the oil - other than very fine flakes from former grindiing while shifting.
The lesson is, expect the unexpected in Trucks 70 years old, and take nothing for granted. And better take apart everything. I never would dare to drive the truck when this pin has just fallen into the gear box (which they very easily do!). Some previos owner or his garage mechanic thought different..... picked another one from the shelf .... and got away with it.
Although having plenty of them, I made a third one of a drill bit shaft without the wear marks.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,462
Likes: 185
From: Dedham, MA
Definitely lucky it didn't get mashed up in the gears. Guess sludge can serve some use at times, kept this thing from flying around in the box.
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