2001 Dodge Truck tachometer

2001 DODGE TRUCK
80,000 MILES • V8 • 4WD • AUTOMATIC
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KBEARDEN
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  • 1 POST
my tachometer jumps from 1500 to 2000 and back at speeds of 45 to 55, I can hear the motor surge, the speed is steady.......this truck is a 2001 1500 Dodge Ram magnum V8 with a 318 engine, it also goes into passing gear when just trying to accelerate normally. Could it be something besides transmission going bad?
Dec 9, 2007 at 10:31 AM
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SERVICE WRITER
  • ✓Experienced Mechanic
  • 9,123 POSTS
Couple things you can do.

-Check for any codes stored in the computer.

-Disconnect the alternater and drive it, may be electrical interference from a bad alternater. If problem is gone, replace the alternater. obviously drive it only enough to confirm.

-TPS may be bad, failry common on these.

-Check to see if the latest pcm software update is in there and what fixes will occur if there is a new version.

-Make sure the fluid is good and the filter changed as it should have been. Must use atf+4
Dec 9, 2007 at 10:48 AM
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