I bought my used 2005 Sea Breeze LX a few years ago and always thought the bedroom slide sounded strained when opening and closing. Last year I replaced the shear pin when the slide stopped working. Last week when getting ready to travel, I tried to put the bedroom slide in and the motor just turned with no slide movement. I thought I knew exactly what was wrong and quickly tapped out the shear pin, but to my amazement, it was intact - not broken at all.
I looked around under the bed and found these laying around.
I found that there is one more gear under the bed that is held in place by a cam pin. The previous obviously didn't find the correct replacement cam pin and Jerry-rigged one to work. This, I believe was the source of the noisy slide operation and the reason the shear pin broke originally. I found the right replacement at AL-KO Kober Corp.'s eStore and replaced it. Here's a comparison of the cam pins.
And the finished repair.