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Changing transmission fluid on my W123 (722.3 automatic) [W123 Transmission series PART 1]

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Added by MiAmigo
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The first step in getting your W123 shifting perfectly is making sure the maintenance is up to par. (This same procedure and series will also apply to nearly every Mercedes of the similar era that uses a 722 series automatic transmission, you may just need to track down a slightly different filter or pan gasket.)

After well over 200,000 miles, and 40 years on the road, I have no idea when or if the transmission fluid has ever been changed in my W123.
Figured with the quantity of longer trips we've been doing it might be a good idea to change it out.

Supplies I used:
Filter and pan gasket: https://amzn.to/3OVvRjx
Valvoline Full Synthetic ATF I used: https://amzn.to/3FjWw6g
Lubegard Red: https://amzn.to/3VECGYO
Magnets used in pan: https://amzn.to/3iuxloT

Tools used:
Neiko Metric Hex/Allen sockets: https://amzn.to/3Vomc7C
Socket set (You just need a 1/4 ratchet, 13mm socket, and 3" extension): https://amzn.to/3ugEawC
Category
722.6
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