When using the jake coming down hills in high position it acts like u r running over the rumble strip only on right side of truck anywhere on the road.in the mid position it does the same after the break has been working for maybe 1 min.less then 1450 rpm it doesn't seem to make the effects. Just started two days ago.whats the possible causes?
2012 Mack Pinnacle engine break
Discussion in 'Mack Forum' started by MoaterBoater, Nov 23, 2014.
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