1999 cummins 5.9 Jake brake
I have a 1999 Discovery with the cummins 5.9 and Allison 3000 6 speed automatic and what is labeled as a Jake brake. Last trip with no warning the brake quit working. I am not familiar with exhaust ...
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My 98 has the same setup, as above I would be checking to see if the brake is free and check the cables and air hose.
