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avnsteve wrote:

My question is 60mph @ 3000rpm in top gear normal?

Doesn't sound too far off, my 1200 used to run around 3600-3700 at 70mph. The 1500s are higher geared by about 500 rpm at 70. Or therabouts. Check your rear caliper, they do occasionally stick and then your brake will drag a bit. It should be free enough to move back and forth a bit with light hand pressure. If one pad is worn a lot more than the other that's a symptom of a stuck caliper.

 

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Man I'm glad I have on old Dodge Cummins, no electronics, direct crankcase venting, no glow plugs and the intake preheater is 16 years old and still works fine. Original untouched injectors. Did replace the waterpump though. 203,554 miles and running fine.