Need to clean up the interior of the POS Colorado for deer season.
Do a exterior and undercarriage high pressure wand wash on it.

Drop the rubber drain plate on the clutch housing and low pressure wand with engine cleaner, then soap, then rinse out the clutch pads and fly wheel while its is idling in neutral.

Get some of the yearly glaze build up off the friction components.
Been doing that once a year for decades to my manual trucks.
You would be surprised at the amount of black schit that starts draining out.

Have had no ill effects over the decades other than better clutch feel and performance.

Just one of my quirks I have done for a long time.
Like when I do a oil change.
Drain it, then start the engine for 5 or 6 secs then shut down to get more oil out of the system IE oil pump, journels in the block, what is left in filter.
Usually about 1/2 to 3/4ths of quart will come out of the drain hole very pronounced.
Been doing that for decades also with no ill effects.

YMMV....
But it is what works for me.
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