I just noticed

158 16
on a 2016 136"

113 21
on our 2021 136"

Day-year of manufacture?

Nothing on the springs of my 2019.

probably lot numbers

Yes, I think lot numbers too. On about 2019 and later (like ours), it seems the numbers are stamped on the top side of the spring ends (not visible from the rear).

328 21 on my 2022 159"

107 17 on my 17 159 hitop

So, I seem to be the only van with numbers that jive.. A coincidence for some strange reason most likely. I appreciate people posting their intel!

Bromaster5 said:

So, I seem to be the only van with numbers that jive.. A coincidence for some strange reason most likely. I appreciate people posting their intel!

Click to expand...

With my 107 17 and your 136 17 or vans may have been built on the same day. Might be possible also that springs are coded as their build day. Such as manufacturing day 107 and day 136 of 2017.
This would give 107 a build date in early June and 136 of August if 20 work days per month.
🤪🤔🫨😒😏😬

Would seem to me the day of the year and the year that the spring was built.....not van. Mine are stamped 346 22 so December 12th, 2022. My van was built 1/10/2023