Help please, gear grinding in neutral and park. - Hyundai Forums : Hyundai Forum
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#1 Old 03-16-2013, 04:00 PM
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Help please, gear grinding in neutral and park.

My 2009 Sonata, 2. 4 L engine, base model with automatic transmission started up and ran OK, but 20 minutes later when I parked the car and shifted towards Park the gears grinded in neutral, stopped grinding in Reverse, and then grinded again when I made it to Park, and I quickly turned off the engine.

When I restarted, it grinded in Park, OK past Reverse, Grinded in Neutral, and then OK in Drive.

Does anyone have any idea how serious this is, or if there is anything I can check out on my own?

Steve Nix
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#2 Old 03-16-2013, 04:20 PM
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If you could take a video, that would help us alot more.

Does your car stay still in park? By that I mean does it roll as if it's in neutral? You may have broken your parking pin which is internal.

I've never heard of an Automatic transmission 'grinding'. That's normally reserved for Manual transmissions.
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#3 Old 03-16-2013, 04:22 PM
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Get thee to a mechanic! Grinding gears in an automatic is not something you can let go.

I hear and I forget, I see and I remember, I do and I understand. Co NF ucius
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#4 Old 03-18-2013, 09:20 AM
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Maybe not so bad....

I was concerned when no one responded with any suggestions of things to try with my problem. After spending some time on the internet, I did find some suggestions. First off, check the level and condition of the A/T fluid. Duh! Why didn't I think of that? Why didn't anyone suggest it?

My fluid level was fine, but the fluid looked black, very dirty. With 44,500 miles it looked like it had never been changed. A/T fluid should be reddish in color.

After trying to find a place that sold SPIII A/T fluid on a Sunday (Dealership parts were closed at local Hyundai and Kia), I was unsuccessful. I kept reading, and found several brands that were made to work with the Hyundai A/T, but would possibly void any warranty. Mobile 1 Synthetic ATF, Mobile Super Multi ATF, Castrol Import Multi-Vehicle, and Valvoline Max Life.

I ended up with Valvoline Max Life at the local auto parts store, and it specifically states on the back that it is made to work in place or with the SPIII fluid. After removing the bottom shield of the front of the engine bottom, and draining the accessible fluid, I added the new fluid into the dipstick tube. I did remove the intake plumbing to make it more accessible.

Well, if you try this, I only guarantee one thing. You will spill some fluid if you are pouring from a 1 gallon container. After a few spills, even using a funnel, I cleaned everything up and finished the fill. 4 quarts did not do the job, but 5 did.

Start up, good. Try out, good. Now I will use the car to get to work this week, and will report back on if I still have a problem or not, just in case anyone else has the same problem.

Dealerships are fine, if you are stuck and can't do the work yourself, and you have the funds to turn over to them, for possibly excessive work (and transmissions are VERY expensive). I was glad to at least try this first.
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#5 Old 03-18-2013, 09:47 AM
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Don't you have the 10 year\100000 mile on the engine, transmission and drive train? Your car is a 2009.
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#6 Old 03-18-2013, 04:32 PM
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That 10/100,000 warranty is only good to the original purchaser, not anyone that buys it used. After the original owner sells the car, the warranty goes to 5 years/60,000 miles. My car has less than 60,000 miles, but more than 5 years since it was originally purchased.

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Don't you have the 10 year\100000 mile on the engine, transmission and drive train? Your car is a 2009.
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#7 Old 03-18-2013, 06:53 PM
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The dealer sold me a certified pre-owned vehicle limited warranty which has the 10 yr\100,000 mile on the power train with a $50 deductable. It goes on to talk about the engine, transmission and drive line. The remainder of the 5 yr\60,000 mile also applies to the second owner.
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#8 Old 03-18-2013, 07:37 PM
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aqua33V6
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Originally Posted by Stevenix View Post
I was concerned when no one responded with any suggestions of things to try with my problem. After spending some time on the internet, I did find some suggestions. First off, check the level and condition of the A/T fluid. Duh! Why didn't I think of that? Why didn't anyone suggest it?
Sorry, I guess we don't have many Fleetwood Mac fans around here.

You may need to break-in your gears a bit more to smooth 'em out. Try an "Italian Tune-Up" by driving real hard through all the gears for a few days.
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#9 Old 03-18-2013, 08:42 PM
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fourwd1
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You may need to break-in your gears a bit more to smooth 'em out. Try an "Italian Tune-Up" by driving real hard through all the gears for a few days.
You don't "break in gears" in an auto trans.
And on things that you do want to "break in" gears on (like a differential), you sure don't do it that way.

2010 Sonata GLS
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#10 Old 03-18-2013, 09:40 PM
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You bring up an excellent point! If a dealer offers that, it is well worth considering. I bought from a Volvo dealer that, of course, did not offer an extended Hyundai warranty. It could definitely pay off if you do run into problems. This is my first Hyundai, and the original warranty actually did give me extra incentive to give it a try. I am hoping to report good results tomorrow, after going 2 straight days without the problem after changing the A/T fluid!!!!


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Originally Posted by seamsealer View Post
The dealer sold me a certified pre-owned vehicle limited warranty which has the 10 yr\100,000 mile on the power train with a $50 deductable. It goes on to talk about the engine, transmission and drive line. The remainder of the 5 yr\60,000 mile also applies to the second owner.
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