Hard Clunk while backing

I have a 2015 CX-9 with 18,000 miles that has started to have a hard clunk while backing that feels like it is associated with some part of the transmission, and it happens while moving. It almost feels like I hit something when it goes clunk. I took it to the local dealer and they are saying they can not hear anything. I am going to have to go back there this afternoon to see if I can replicate it for them. This happens when it is cold and warm and only while backing? Has anyone else had a similar problem? Would love to hear your thoughts.

sam my car while change R to N to D .

أرسلت من SM-G920I بإستخدام تاباتلك

Ski Man Ski said:

I have a 2015 CX-9 with 18,000 miles that has started to have a hard clunk while backing that feels like it is associated with some part of the transmission, and it happens while moving. It almost feels like I hit something when it goes clunk. I took it to the local dealer and they are saying they can not hear anything. I am going to have to go back there this afternoon to see if I can replicate it for them. This happens when it is cold and warm and only while backing? Has anyone else had a similar problem? Would love to hear your thoughts.

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yep, same as mine, it felt like someone rear ended me, my happened also when new like 8,000 miles. Dealer couldn't replicate also, seems to happen when I'm on a slight hill. Now I pause between shifts, seems to work.

see here : http://www.mazdas247.com/forum/showthread.php?123856350-Hard-Gear-shaft-when-car-is-on-slanted-surface


do you have AWD ? I recommend changing the inferior OEM oil out asap:
http://www.mazdas247.com/forum/showthread.php?123847373-Changing-CX-9-transfer-case-gear-oil-%28photos%29

Have the same problem also had that on my previous vehicle. It is the parking pawl. Use your parking brake and pause between shifts also that helps a lot.

Ski Man Ski said:

I have a 2015 CX-9 with 18,000 miles that has started to have a hard clunk while backing that feels like it is associated with some part of the transmission, and it happens while moving. It almost feels like I hit something when it goes clunk. I took it to the local dealer and they are saying they can not hear anything. I am going to have to go back there this afternoon to see if I can replicate it for them. This happens when it is cold and warm and only while backing? Has anyone else had a similar problem? Would love to hear your thoughts.

Click to expand...

As a rule (for all Audible or Kinetic/kinesthetic based faults), I never allow the dealer to inspect my vehicle for the purpose of replicating faults without putting their mechanic/technician in the vehicle with me, where I replicate with ascent from that same mechanic/technician, first. After they give their ascent that they heard or felt the fault, I then allow them to replicate from the driver's seat in my presence. After that, I can exist the vehicle and allow them to do their work. For fault items that are not either Audible or Kinetic/kinesthetic (meaning you cannot hear or feel/sense through motion the fault) - like for example the fault of an engine failing to produce specified power or torque beyond a certain RPM, I make sure I get tertiary confirmation in print before approaching the dealer for repairs. So, in that case, a Dyno Report clearly showing a sudden loss of horsepower above a certain RPM would suffice - where that loss of horsepower would never show itself below that same RPM - thus causing the dealer to not be able to replicate.

Moral: never take a vehicle to dealer if you don't absolutely have to and if you do absolutely have to, never take a vehicle to any dealer for repairs without being able to clearly demonstrate the possible fault - either empirically through a tertiary source or physically with replication.

Based on your reported symptoms, there is a broad range of possible culprits. Not being familiar with the old CX-9 design, I cannot help there. But, hopefully, the method of approaching a dealer with faults that I use is somewhat helpful.