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2.9L viberation


mailmanlaw

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I have a viberation in the engine at 2500RPM and higher. I have a A4LD trans.
I did away with clutch fan on engine and went to electric fan, which I am very happy with that change. That did not make any difference in viberation.
 
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krugford

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Could it be the torque converter? I've seen that cause a vibration above certain speeds.
 

AllanD

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a "Bad" vibration on a 2.9 Auto makes me immediatly suspect a broken flex plate.

It's a fairly common problem.

And sadly it's the first thing that needs to be ruled out.

AD
 
baddis

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AllanD said:
a "Bad" vibration on a 2.9 Auto makes me immediatly suspect a broken flex plate.

It's a fairly common problem.

And sadly it's the first thing that needs to be ruled out.

AD
Click to expand...
+1 i had an 88 that had a vibration. as i was taking it over to a friends to look for the vibration the engine raced up to wot and the truck quit moving
 
krugford

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Out of curiosity, since I have never had to deal with a broken flexplate, is that a pull the tranny kind of inspection, or look through the inspection cover kind of inspection? Where do they normally break? Near the crank?
 

n9llo

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I am replacing my third broken flexplate. Every time I have inspected or replaced the crank spacer. What am I missing?
This is in an 88 Bronco II, A4LD, 4:10 gears, 31x10.5's

Chris
 

IMenriched

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I had a pretty healthy vibration due to the rear tires going bad....not to say it could still be the flex plate...just another thought
 
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