'93 K1500 (floor shift) does not fully disengage. It has a rapping/knocking noise. The thermal actuator is new(ish); it worked fine when it was new. Is this a weak actuator, something sticking, hub, half-shaft or something else?
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Rapping/knocking noise from WHERE? Transfer case? Front differential? Rear axle? One or both driveshafts? Engine?'93 K1500 (floor shift) does not fully disengage. It has a rapping/knocking noise.
Well easiest way would be to simply unscrew the actuator and see if changes. Probably in there.....
Shouldn't leak much if any.