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Old 04-25-2011, 04:32 PM   #1 (permalink)
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Hi everyone. I'm hoping everyone can help me out. I have a 2008 Hyundai Accent GS. My car currently has ~29,000 miles on it and the owners manual says to flush the transmission fluid around 30,000 miles. I bought 7 quarts of Mobil 1 Synthetic ATF Multi-Vehicle Formula to do this but now I have read a few things on the interwebs that say to only use Hyundai branded ATF. I understand that my car uses SP-III ATF, and on the back of the Mobil 1 container, it states "Also suitable for use in automatic transmissions for the following applications: Hyundai SP-II, SP-III; Kia SP-II, SP-III" so my question is: Will it be okay to use the Mobil 1 synthetic ATF in my transmission or should I really buy the Hyundai stuff?[attachment=25361:IMAG0043.jpg]
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Old 04-25-2011, 04:53 PM   #2 (permalink)
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Every single car manufacturer out there is going to tell you to use their brand of fluids. As long as the product is the same (You've done your homework already) You are good to go.
I've purchased redline fluid for my MT and will be doing a flush in the month to come.

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Old 04-25-2011, 06:28 PM   #3 (permalink)
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Here's another question....my manual says the auto tranny fluid only needs to be changed every 60k with severe usage. Is there a reason why Hyundai extended the change interval on later models? Is it safe to follow this recommendation or should it still be changed every 30k?
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Old 04-25-2011, 06:47 PM   #4 (permalink)
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I guarantee your owners manual does NOT say to flush the tranny. In fact, Hyundai Corporate says specifically to NOT flush it. Changing the fluid and flushing the transmission are 2 completely different things. If you flush the tranny on the Accent, you will ruin it. That said, the Diamond SP-III ATF is absolute garbage. It hardly protects the tranny from heat. Do yourself a favor and buy some quality better-than-SPIII ATF, such as Royal Purple or equivalent.
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Old 04-25-2011, 07:24 PM   #5 (permalink)
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QUOTE (bloodninja @ Apr 25 2011, 06:47 PM)
Quote:
I guarantee your owners manual does NOT say to flush the tranny. In fact, Hyundai Corporate says specifically to NOT flush it. Changing the fluid and flushing the transmission are 2 completely different things. If you flush the tranny on the Accent, you will ruin it. That said, the Diamond SP-III ATF is absolute garbage. It hardly protects the tranny from heat. Do yourself a favor and buy some quality better-than-SPIII ATF, such as Royal Purple or equivalent.
If you request the dealer to change the ATF, I'm pretty sure they will flush it, not just drain and refill. So why would this ruin it? I've never heard of a tranny flush ruining a tranny and there are no warnings inside the manual. From what I understand, it allows a complete change of the old fluid, unlike a drain/refill where some of the old fluid is stuck inside the converter. If you would be so kind, could you point me to where this info is?
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Old 04-26-2011, 02:19 AM   #6 (permalink)
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QUOTE (carfreak09 @ Apr 25 2011, 07:24 PM)
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If you request the dealer to change the ATF, I'm pretty sure they will flush it, not just drain and refill. So why would this ruin it? I've never heard of a tranny flush ruining a tranny and there are no warnings inside the manual. From what I understand, it allows a complete change of the old fluid, unlike a drain/refill where some of the old fluid is stuck inside the converter. If you would be so kind, could you point me to where this info is?
Via phone conversation with Hyundai Corporate, the mesh filter in the automatic transmission of the Hyundai Accent is not removable or serviceable. Flushing the transmission instead of simply draining and refilling the fluid will cause any particles to break free from the mesh filter and mix with the moving parts of the transmission. The lady did not specifically say that it would void any warranties, but she said many many many many times with great emphasis DO NOT FLUSH IT. Just drain and refill with new fluid.

If I were you, I would do what I did. Drain/Refill fluid. Drive 1,000 miles more. Drain/Refill again. That way you should be getting out virtually all of the old fluid.
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Old 04-26-2011, 02:22 AM   #7 (permalink)
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To add more to the previous post, my dealership said, upon asking to make sure before I did it myself, that they absolutely DO NOT flush the transmission... and then continued to repeat almost verbatim what the lady from corporate had told me.
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Old 04-26-2011, 02:39 PM   #8 (permalink)
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QUOTE (bloodninja @ Apr 26 2011, 02:22 AM)
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To add more to the previous post, my dealership said, upon asking to make sure before I did it myself, that they absolutely DO NOT flush the transmission... and then continued to repeat almost verbatim what the lady from corporate had told me.
Ok, I'm going in for an oil change tomorrow. I'll ask the dealer and see if he says the same thing. Thanks for the info. What do you tihnk about the 60k fluid change?? Follow it or I'm asking for trouble?
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Old 04-26-2011, 02:45 PM   #9 (permalink)
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I changed mine at 30k miles and I intend to always change it every 30k. Better to spend the money on ATF than a new tranny.
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Old 04-26-2011, 08:21 PM   #10 (permalink)
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quick question when you change it how much do you put back in? should the car be in neutral? any help thanks
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