On a large number of occasions, the transmission of my 2010 Hyundai santafe AWD would slip into neutral as it went through the gears. That is when the car was still relatively cool as in the morning, it would start off in first, shift to second and then on some occasions slip into neutral. With a little on and off on the accelerator it would then go into third and then shift normally. The only times that it would happen was when the transmission oil was still cold. Hyundai changed the transmission computer per a service bulletin. When the condition reappeared it then offered to replace the transmission in its entirety. This seems to have solved the problem. My concern would be that if it did happen when one entered a line of traffic. This certainly could have created a dangerous situation. Till the situation was resolved, it happened on a significant number of occasions. Hyundai was responsive to the problem, and seems to have tried to address the problem. The vehicle has approximately 10,000 miles at this time. It was purchased new in April and the problem began in June. That at least is when we first observed it.

- Gardner, MA, USA

Problems with my 2010 Hyundai Santa Fe with 11,000 miles. Like hundreds of others my car bangs when starting and bangs so bad while trying to shift gears when cold that I thought I was hit from behind. When driving slow the transmission shifts so hard that my wife is afraid to drive this new veh. After reading about all the problems others are having on edmonds.com I thought I would E-mail you people. The way, reps at the dealership I bought say that this is normal, I have to laugh.

- Algonquin, IL, USA

2010 Hyundai Santa Fe. Transmission problems. "lurches" from 2nd gear to 3rd gear. Loud clanking sound when starting (not on all starts, about every 7-10 starts). Slow speed sputters. Slips at slow speeds when accelerating then slams into gear very roughly.

- Leawood, KS, USA

I have a 2010 Hyundai Santa Fe. I have been having problems with it shifting. It will shift really hard and sometimes when I go to give it the gas it will rev to 4rpms before it goes then it bangs in to gear. I have it back to the dealership a few times and they tell me they can not replicate the problem. This is being to be really frustrating. I have had much patience with the dealership, but when the say they put it onto the computer and can not get a code and there is nothing wrong with the vehicle. I am getting afraid to drive the car. I don't know what more to do. Is there anyone out there that has the same problem and has had it fixed so I can tell the dealership?

- Norristown, PA, USA

My problem is with a 2010 Hyundai Santa Fe, 4 cyl. The problem is that the vehicle sometimes hesitates to move forward, and then suddenly accelerates. It happens when the vehicle is stopped as in traffic. When the accelerator is depressed the vehicle does not immediately move forward, and then it suddenly moves forward very quickly. I have reported this problem three times to my dealer. They had a " factory" service mgr ride with me for about a half hour. The problem did not happen. It has happened unexpectedly many times since then. I was almost in a serious accident from this problem. The dealer put the car on the diagnostic machine and finds no problem. Today a friend of mine who has a gas station in asheville, nc had a customer ask him about the exact same problem with the identical vehicle. I spoke with the individual and his problem is exactly the same as mine ! that is why I am writing to your office. I have filed a complaint with Hyundai [xxx] but the problem continues. I will be happy to let the gov test my vehicle. It is a safety hazard. My daughter had the same experience and said she would not drive it any more. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Abilene, TX, USA

My husband and I were traveling North from palm coast, fl to slatington, pa. Traveling North on rte I-95, my husband drove about 300 miles and than I drove another 300 miles, stopping to eat and at various rest areas. Just before the Virginia border, we stopped at a rest area and my husband took over driving. He said we should stop for gas and a bit to eat. We went over the state line and got off at exit 4, we exit, stopped at the stop sign, turned right to go into the station and we heard a loud snap. At this point, the only way he could stop the car was to put on the emergency brake there was no control of the car. After being towed to the dealership, we were told that possibly the driveshaft snapped and the transmission also went. The mechanic there said that this is the third one he had seen like that. The next day we were told that in fact that is what had happened. Luckily, we had gotten off when we did, or else we may have been in a major crash on busy rte I-95 or may even had been killed because of no control of the car. This is 2010 car with only 17,700 miles on it. Today, we found out that Hyundai knew of the problem and that the dealers have received a bulletin about this. We were not told of this dangerous defect and now do not know if this has been corrected properly. We are supposed to pick up the car in Virginia by the end of the week. We do have a major concern about this car.

- Palm Coast, FL, USA

The contact owns a 2010 Hyundai Santa Fe. The contact stated that the transmission seemed to grab or drop. When he reversed and then shifted into drive, he noticed a clunking noise when accelerating. He noticed the failure everyday when he first drove for that day. The contact explained the failure when he took the vehicle to the dealer for an oil change but the vehicle was not inspected or repaired. The manufacturer was not notified. The VIN was unavailable. The failure mileage was approximately 1,000 and the current mileage was approximately 8,000.

- The Villages, FL, USA

2010 Hyundai sant fe, SE V6 3.5 AWD. There is a gear clanging noise in the transmission when the vehicle is first started up. This occurs about every third time the vehicle is started. Vehicle is rocked by the movement. Dealer could not duplicate problem ' nothing done.

- S. Windsor, CT, USA

With a cold engine in the morning, my 2010 Hyundai sante fe vehicle transmission shifts with a loud "bang" around 10mph. This is sporadic. Also at start up, the vehicle while sitting in park, does the same thing when started, though not as forceful at when driving. I now have 4800 miles, and this has been happening every 2 or 3 weeks minimum. I used to think little of it until it has begun repeating even after the dealer "reset" the software. I also notice now there are several auto websites very aware of the problem. Here is one: townhall-talk.edmunds.com/direct/view/.F127D3D/199. I am scheduled to leave the car this week, and they are not acknowledging a problem unless they can duplicate it. I feel this is an unsafe condition to operate the vehicle in, and that it will only get worse. I will file a lemon law claim after 2 more attempts to fix this extremely obvious problem.

- Venice, FL, USA

2010 Hyundai sante fe AWD transmission issue. Immediately upon starting, while car is in park, car idles high, wants to lurch backward, but is "caught" by the fact that it is still in park. Makes a loud bang sound when this happens - almost like something in the frame or elsewhere in car catches it. Then, when putting in gear, it idles high and accelerates very quickly without foot on gas. Need to keep foot securely on brake for safety. Hyundai denies a problem when it is brought in for service. Other Hyundai Santa Fe drivers indicate problem is with transmission and gets worse over time, including having stalls while in traffic, , unexpected acceleration, car won't shift in 2nd and 3rd gears. Please get Hyundai to address this problem and issue a recall.

- West Allis, WI, USA

2010 Hyundai sante fe transmissions bangs into gear between 1-2 giving a feeling as if someone has rear ended your car.it also has a rocking motion while driving. Mostly does this first thing in the morning but will also do it randomly. Call Hyundai and they claim that they do not have any knowledge of a trend on transmission problem with the sante fe. I took car to dealership for them to look at and left it overnight they could not find any problem. At my suggestion they reflashed the computer and it helped for a week and now the car does the same thing banging/learching into 2 gear.

- Columbia, TN, USA

As the engine starts with the gear shift in "park", the 2010 sante fe lurches forward as if the transmission has not disengaged. The forward lurch ranges from a sensation of motion to an inch of tire rotation. Furthermore, this happens again when the vehicle is in motion when idling between 1200-1500 RPM and when accelerator is released and pressed again at around 20 mph to 25 mph. It has happened at speeds as high as 40 to 45 mph. It feels like someone bumped into me from behind. In one instance I quickly applied the brakes assuming I was rear-ended.

- North Billerica, MA, USA

Brand new 2010 Hyundai Santa Fe limited 6 speed auto transmission. Vehicle sometimes makes a loud bang from transmission at start up. Vehicle lurches forward when started up in park. Also loud band when engaging reverse. Has a problem shifting sometimes from 2nd to 3rd gear, a slight hesitation sometimes. Car has also died on me for no reason when pulling out of a junction. Will be taken the vehicle to my local Hyundai dealer asap. Love the vehicle but seriously worried with the transmission issues. Most of the issues are happening daily apart from the stalling issue which has only occurred once.

- Grand Junction, CO, USA

Vehicle sometimes makes a loud bang at startup. Haven't observed any sudden jerks while vehicle is in motion but wondering if this "banging" problem will lead to a transmission failure while vehicle is in motion. 2010 Hyundai Santa Fe limited 3.5 L V6 AWD.

- Angola, IN, USA

Brand new 2010 Hyundai Santa Fe intermittently lurches forward and reverse when started up in park. Appears as if starting up "in gear" when in park.

- Ballston Lake, NY, USA

The contact owns a 2010 Hyundai Santa Fe. The contact was driving 25 mph when she heard an unusual noise. Immediately, the vehicle gauges began to shake. The contact moved the vehicle off the roadway. As she resumed driving and reached 25 mph, the failure recurred. The vehicle was towed to a dealer where a diagnostic was performed and it was determined that the transmission was defective and would need to be replaced. The manufacturer offered to replace the transmission with a rebuilt transmission. The contact was not certain if the rebuilt transmission would repair the failure. The current and failure mileage was approximately 3,700.

- Columbus , OH, USA

New 2010 Hyundai Santa Fe--after approx 3 weeks ownership, car tries to go into reverse, makes loud noise, when started. Does not happen every time, maybe 3-4 times a week. Also have "miss" /"jerk" when car shifts at slow speed from 2nd to 3rd gear-vehicle has been to dealer 3 times for problems--first two trips dealer said they could not duplicate-trans shifter cable adjusted last trip to dealer but problem persists--.

- Del Rio, TX, USA

2010 Hyundai Santa Fe V6 AWD limited I put the key in the ignition to start it, and the vehicle lunged forward approximately 6 inches. The vehicle was in park when I started it. Luckily my foot was near the brake, so I instinctively slammed on the brake. I do not know how far it would have gone if I had not depressed the brake pedal. Luckily the vehicle in front of me was far enough away, also lucky that there was nobody walking between my vehicle. I looked on a hyundi forum and there several complaint's the dealer said they could not find anything wrong I asked them to contact the factory and they did not have any complaint's onthe same problem.I told them to look at your web site and the forum.I am a auto mechanic and I can tell you if the park paw that's holds the car in place lets go after constantly getting pulled away when this happens the truck can take off and hurt/kill somebody please help!!!!! thank you

- Staten Is, NY, USA

Hyundai sante fe 2010 was purchased new in February 2010. Within 3 months the vehicle stalled and died twice while in route.and displayed difficulty up-shifting and down=shifting, 1st - 3rd and 3rd - 1st. Returned to service dept of dealer. Service dept unable to determine cause of incidents. Within 2-3 months post these incidents, the vehicle "clanged and banged"and continued problems with acceleration and shifting gears. Also began an intermittent loud "vacuum cleaner" noise during gear changes. Returned vehicle to dealer service center and after 4 hour review, was informed the transmission would need to be replaced. When the vehicle was reported as repaired, and was required to be picked-up, no statement or document was provided to indicate repairs or damages. Not until the dealership and manufacturer were contacted was the statement offered, one week later. Haven't seen the statement yet as it will be accessed through the dealer this week. I was informed the vehicle was repaired by replacing the current defective transmission with the a new same-model transmission. What is that about" replace the defective transmission with a newer defective model, I don't think so! I am a widow with one car to drive for work. In my line of work, I am alone on the road several weeks a year. Please can you assist me with this issue" thank you for your consideration.

- Charleston, WV, USA

2010 Santa Fe. I get a loud knock (which jerks the vehicle) every so often when I start the vehicle. The dealer cannot find anything with it. I also get a pause at times going from 2nd to 3rd gear in my automatic transmission. Dealer refilled transmission fluid which seems to have helped that a little, but it still jerks at times while shifting gears. The knock has not stopped however. Just happened again yesterday which is at least the 15th time it has happened since we bought it in March. I have talked with others who have a 2010 Santa Fe and they say they have experienced the same problem. All of it seems to be a transmission issue to me, but the dealer says they cannot find anything. Not normal, and definitely should not happen with a new vehicle. I really like the vehicle outside of that.

- Saint Joseph, IL, USA