flyboyg, welcome to iRV2.
Congrats on the new coach, although it's a little disappointing you had a malfunction at your first viewing. I'm sure the dealer will get the problem corrected, but I understand you are concerned this may be a recurring problem.
We have Power Gear electric slides on our '05 Allegro Bay. Periodically, the front 12' slide will break a shear bolt on the drive mechanism. I carry spares and can change one out in about 5 minutes, but I have to climb under the slide to do it. This problem didn't start until the coach was a couple of years old.
If I recall correctly, Tiffin uses a combination of electric and hydraulic slides on their 3 and 4 slide floorplans. Therefore, the shear bolt may or may not be the problem depending on whether it's an electric or hydraulic slide. When the shear bolt fails, the motor will continue to run and one end of the slide will continue to move.
The problem could also be a faulty relay, although I don't think this would make a loud clunk. Relays interlock the slides with the ignition switch so the slides can't be actuated while driving down the road.
Good luck, and let us know what the dealer finds.
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