Drive train shutters under low throttle at low RPM

Tiny
MOOSE65
  • MEMBER
  • 2005 CHRYSLER 300
  • 71,000 MILES
When driving under low throttle and when the engine (300C w/5.7) is at low rpm (1000 - 1200 or so) a shuttering in the drive train (feels like transmission but I see rpm move also) occurs to coincide with slight gas peddle actuation. I can also hear what sounds like the transmission shifting back and forth with a bit of a clunk. This happens at several different speeds depending on what gear the transmission is in (30 mph and 55 mph for instance). I work around it by manually shifting to a lower gear which keeps the engine at a higher rpm or alternating between a deeper acceleration force on the accelerator followed by drifting with no acceleration as the car slows back down. The car starts and idles and accelerates perfectly. I thought it might be a failing fuel pump or fuel control system malfunction of some type or even the cylinder deactivation system having trouble but really have no idea. I recently had the transmission serviced (flushed and refilled) at our local dealership. This had no affect.
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Friday, November 18th, 2011 AT 11:03 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Have any trouble codes come up?
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Friday, November 18th, 2011 AT 11:53 PM
Tiny
MOOSE65
  • MEMBER
  • 2 POSTS
I've done the Key Dance but nothing came up. I don't have a code reader so I don't know if anything else would come up. I should probable get one though.
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Saturday, November 19th, 2011 AT 2:07 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
If you take the vehicle to a nationally recognized parts store chances are they will scan it for free. Call around to see.
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Saturday, November 19th, 2011 AT 4:31 AM

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