How do I know my harmonic balancer is bad on my 2002 Ford F-350 w-7.3lt. Diesel?

Tiny
MARAUGHA
  • MEMBER
  • 2002 FORD F-350
  • 108,467 MILES
Between 43 and 55 mph I have a front end vibration. A high speed vibration. New & well balanced tires. New drive shaft u-joints and hanger bearing. NEW Rancho 9000 series shocks & steering stabilizer. At the aforementioned speeds, I let up on the accelerator and the vibration stops.
Thursday, May 17th, 2012 AT 10:37 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The transmission could be slipping have it checked-check the transmission fluid level and condition, also check axles
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Thursday, May 17th, 2012 AT 10:49 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your belt and tensioner, if you see the tensioner moivng around it might be bad, if you have never changed it you should as belt life is normally 60,000 miles. If you do change it creplace tensioner as well. To check for bad balancer, draw a chalk line accross front of balancer, with engine off, startup and rev engine then shut off. Of cousr with a turob engine make sure yo let it idle down properly before shutting down, then see if chalk marks are lined up. If not the rubber has broken in the balancer.
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Thursday, May 17th, 2012 AT 10:51 PM

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