When cruising 20-30 miles, the transmission would shutter or make loud grinding noises and vehicle would shake. Dealer couldn't duplicate noise and nothing was done until 2014. Transmission oil was changed and if problems comes back, they would change it. Problem came back and now makes trembling noise and feel it when reaching speed of 49 exactly and 1500rpm, during shifting gears and could get stuck. Dealer stated is normal sound. Now I have check engine light with code P0706, which is open in transmission range switch circuit probable cause. Searched and it seems that this year model, Acura MDX 2006, has had problems with transmissions and no recalls. Car makes noise while this is happening while on the highway. Sometimes the truck gets stuck doing this until I accelerate or bring down the speed on the highway. There are many complains with this issue, an Acura has not acknowledge the problem. I am afraid to have an accident on the highway or the vehicle gets stuck trying to change gears.

- Yonkers, NY, USA

Transmission has problem shifting and down shifts without notice even when applying pressure on gas - causing car to slow. Dangerous for cars following behind - almost rear ended.

- Mountlake Terrace, WA, USA

The contact owns a 2006 Acura MDX. The contact stated that while parking her vehicle, she heard a loud popping noise and the vehicle erroneously accelerated causing her to crash into a building. The contact received minor abrasions. The police were contacted and a report was available. The vehicle was later towed to an independent mechanic. After diagnosis, they advised her that the failure occurred due to her possibly depressing on the accelerator versus the brakes. The manufacturer was contacted and they offered no assistance. The failure mileage was approximately 98,000. The current mileage was approximately 103,000. The VIN was unavailable.

- Lehigh Acres, FL, USA

Recently purchased 06 MDX. Didn't notice the transmission issue right away. About month after purchase, I noticed shutter/grinding/judder/whistling coming from the transmission. Took it into Acura dealer. Acura replaced torque converter and updated PCM software under warranty. About week later, started noticing the same shuttering noise coming from transmission again but its not as noticeable but definitely noticeable and the problem is still there. Acura did not "fix" the problem. It seems Acura had fixed the "severity" of it to the point where you can only slightly hear it. After being thoroughly frustrated with this issue, I started researching the internet and found out there are many many many many others with this same problem. It seems that there is no permanent fix. Numerous owners have same repeat problems even after replacing the entire transmission. The problem seems to be that of a "design" of transmission error by the Acura so essentially, only permanent fix would be to replace the transmission with the newly redesigned transmission. If you replace the same parts over and over, you will have same problems over and over. Acura fails to acknowledge this. If you take the car to any Acura dealer, they will vehemently deny there is transmission problems(I am sure they're trained by the corporate to deny, deny, deny). Unfair. Essentially, my car is a "lemon" albeit a used lemon....

- Rockford, IL, USA