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Message: <blockquote data-quote="trickpony1" data-source="post: 4538658" data-attributes="member: 1957">The clutches did have fluid...I agree.The clutch pedal was air assist and didn't require massive quads to operate it.The GMC Astro's I drove had 5 speeds, air assist clutch and rigid mounted cabs that were popping the rivets out.The reason I remember this is because, as a newbie, I jumped up in the cab, started the engine and crammed it in reverse.The air hadn't built up yet and I had to drive around in a circle, in reverse, until the air built up enough to operate the clutch to get it out of gear. This is the reason we were trained to park in neutral in case the clutch air leaked down.</blockquote>