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Replace all 4 slides, usually 2 green and 2 white,

You may as well check the following for wear and slop and give it a bit of an overhaul since you have it apart.
Belt, idler wheel, rear support bearing, motor bearings, all seal in the air flow path, drum seals etc.
Pay special attention to the rear support bearing this is a common weak point in this dryer design.
Give the interior a good cleaning including the blower wheel.
Also a good time to check/clean your vent system.