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Mack 18 Spd


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My truck has 133,000 miles and came with the 18 Spd transmission. My problems are: doesn't want to got into 4th on high side. When it does go or drops in it behaves like nothing is wrong. When it doesn't it feels like it is setting on the edge of the gear until it jumps out. No other problems with the transmission and the clutch is fine.

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