It helps but its expensive to change a clutch so you try not to do any slipping of it at all. In the big trucks that I've owned(2 Macks, a Sterling and a Peterbilt) we only used the clutches to get rolling. You should be able to get the truck moving without even touching the throttle. After that its all matching revs and only touch the clutch when you stop.
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New rat from the sinking ship.
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