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Old 08-12-2012, 05:13 PM   #1
Christoph
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Transmission clunk

My automatic transmission was clunking into Reverse and Drive. I had 2 mounts replaced at the dealer as well as new tranny fluid. 1 mount was on the rear of the engine and the other one I can't remember where exactly. The clunk from Park into Reverse is gone, but the clunk from anything into Drive still exists. It isn't as harsh as before the mounts were replaced, but it's still a significant clunk. Also I had the dealer put in new tranny fluid because the shifts 1 to 2, etc. were a bit hard. Those have since died down quite a bit.

I just got in from cleaning the MAF and installing a new air filter. I read that dirty MAFs could cause this, but the clunk into Drive is still there. Should I have disconnected the battery while cleaning the MAF? The weird thing though is ever since the new mounts the clunk into Drive is almost always there, but not always. Sometimes it's smooth, but a majority of the time it clunks into Drive.

Any ideas on what I should check next?
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Old 08-12-2012, 05:47 PM   #2
AaronGTR
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AaronGTR has made plenty of valid pointsAaronGTR has made plenty of valid points
Disconnecting the battery won't do anything. Whether you are cleaning the MAF or not. If the car is off, it won't affect anything, and disconnecting the battery won't reset anything in the computer that will affect your shifts.

If all the mounts are good, it's possibly you could have some play in the CV joints. Try jacking up the front of the car and turn the tire forward and back by hand... there shouldn't be too much play and it shouldn't make a big clunking sound. There is usually a little play in them, but not too much.
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Old 08-12-2012, 09:51 PM   #3
AleroB888
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AleroB888 Gettin' there
Quote:
Originally Posted by Christoph View Post
My automatic transmission was clunking into Reverse and Drive. I had 2 mounts replaced at the dealer as well as new tranny fluid. 1 mount was on the rear of the engine and the other one I can't remember where exactly. The clunk from Park into Reverse is gone, but the clunk from anything into Drive still exists. It isn't as harsh as before the mounts were replaced, but it's still a significant clunk. Also I had the dealer put in new tranny fluid because the shifts 1 to 2, etc. were a bit hard. Those have since died down quite a bit.

I just got in from cleaning the MAF and installing a new air filter. I read that dirty MAFs could cause this, but the clunk into Drive is still there. Should I have disconnected the battery while cleaning the MAF? The weird thing though is ever since the new mounts the clunk into Drive is almost always there, but not always. Sometimes it's smooth, but a majority of the time it clunks into Drive.

Any ideas on what I should check next?
Could be a high resistance or open circuit, pressure control solenoid to the PCM, which should set a code but not the SES light. Sometimes faulty TPS or IAT, but the dealer should have scanned for all that.
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