2002 Dodge Dakota help

2002 DODGE DAKOTA
140,800 MILES • V8 • 4WD • AUTOMATIC
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TGOFF
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  • 2 POSTS
when driving at about 30mph and then giving a little gas it thumps just wondering if changing tranny fluid and adding some lucas would help that.also engine revs by its self driving and stopped i think maybe a vacuum leak of somekind can you help and how much tranny fluid do i need???
Apr 16, 2009 at 6:16 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Hi:
First, just make sure the trans is full. The thumping sounds more like a universal joint. Make sure they are all tight and free of play.

Also, as far as the engine rev, has the check engine light ever come on?

Joe
Apr 16, 2009 at 8:28 PM
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TGOFF
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thanks joe no the light is not on thats why im thinking vaccum leak.and how do i make sure uni joint is tight ?
Apr 17, 2009 at 8:35 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
It could be a vacuum leak or even a fuel pump pressure problem. As far as the u-joints, they are at each end of the driveshaft. Take all tension from the drive line by placing it in neutral with the park brake secure so the car can't move. Grab each u-joint to see if there is any play sideways, up / down...

Let me know what you find.

Joe
Apr 17, 2009 at 1:30 PM