Automatic Transmission - strange sound after flush/fill - Hyundai Genesis Forum
 
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post #1 of 5 Old 1 Day Ago Thread Starter
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Automatic Transmission - strange sound after flush/fill

Hey everyone,
I took my 2013 8-A/T to a local shop to have the transmission fluid flushed and replaced. They have the fluid vac to suck out all the old fluid, so I opted not to do a drain & fill. I bought Redline fluid based on a thread I found on this site...I don't recall if it was D4 or D6, but it was the correct one. So that's what the shop put in to replace it. Anyway, that was when I had about 55,000 miles on the clock...I just went past 63,000 yesterday.

The problem is that ever since the fluid change I've been getting an occasional high-pitched "tone" from the transmission. It happens 2 or 3 times a week, and usually when it's warmer outside, and the sound lasts for about 3 seconds. It sounds like a fluid is moving through a valve or something. Performance doesn't seem to be lacking at all...shifts are fine, as well as transmission temps.

Anyone have something like this happen to them, or heard of it?

I'm considering changing it again to the Cerma fluid (recommended here), but doing it myself by disconnecting the lines from the radiator and flushing / filling it that way.

2013 3.8 Track, A/T
Magnaflow CBE dual exhaust
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Maybe the trans is not full. Air in there somewhere?

2012 Genesis 3.8 Track, Silverstone, w/ZF Trans.
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Wink

I know you dont want to hear this,...but. Find a larger Hyundai dealer near you,(or a new fangled GENESIS dealer). They really know their way around the ZF stylr 8AT. Bring 9 qts of CERMA AT with you and pay for labor only fluid change.

Some on here take a whack at draining and filling. WRONG ! The ZF style 8AT needs to be pressure evacuated, and pressure filled. End of story.

Beyond that proceed at your own risk, and yes, you will encounter little "occurrences" like you have.

My Hyun expert did mine while he was still the lead master tech at my dealer, he had the car for at least 3 hours. Did the pressure drain and refill. Ran it to opersating temps, checked the level, added, repeat. Bottom line is with these transm, its a bit tedious to get it right.
(He has his own biz now).I did mine at 19K, and will be replacing it again at 65K Severe duty maintenace requrements are change ATF every 45K. If you are N/A tuned or turbo anything,....thats severe duty, period.

And to end any bunk, CERMA ATF can be used in any transmission made, and exceeds all standardsand requirements including ZF's.

It re-elasticizes even burnt and damaged seals.

Here we go again !

Last edited by Gaijinn; 20 Hours Ago at 08:50 PM.
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Quote:
Originally Posted by -fritz- View Post
Maybe the trans is not full. Air in there somewhere?
That's a possibility...I wouldn't expect fluid to make noise at all, but air, yes.

Quote:
Originally Posted by Gaijinn View Post
I know you dont want to hear this,...but. Find a larger Hyundai dealer near you,(or a new fangled GENESIS dealer). They really know their way around the ZF stylr 8AT. Bring 9 qts of CERMA AT with you and pay for labor only fluid change.

Some on here take a whack at draining and filling. WRONG ! The ZF style 8AT needs to be pressure evacuated, and pressure filled. End of story.

Beyond that proceed at your own risk, and yes, you will encounter little "occurrences" like you have.

My Hyun expert did mine while he was still the lead master tech at my dealer, he had the car for at least 3 hours. Did the pressure drain and refill. Ran it to opersating temps, checked the level, added, repeat. Bottom line is with these transm, its a bit tedious to get it right.
(He has his own biz now).I did mine at 19K, and will be replacing it again at 65K Severe duty maintenace requrements are change ATF every 45K. If you are N/A tuned or turbo anything,....thats severe duty, period.

And to end any bunk, CERMA ATF can be used in any transmission made, and exceeds all standardsand requirements including ZF's.

It re-elasticizes even burnt and damaged seals.
I do regret not using Cerma last time...but the shop I take it to is really good...they know what they're doing and they did use a pressure evacuator to drain & fill. I really hate dealers, too. LOL.

Still, I agree with the drain and fill being bad, but what are your thoughts (specifically) about why flushing the entire system with the lines that run to the radiator isn't a good option? I'm not doubting your knowledge...just wondering why that isn't a good alternative.

2013 3.8 Track, A/T
Magnaflow CBE dual exhaust
Drop in K&N airfilter
Stance Super Sport Coilovers
Enkei RPF1 18x9.5 wheels (Autocross only)
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The reason is the system you are draining is pushing and replacing, but theres no way to get an accurate fill level check while doing it.

You woud have to perform the drain fill, let her stand, and then perform the level check. This is done by removing two transmission case plugs, and observing fluid running out. When its runs out, or overflows at the plug/bolts the level iis proper.

Even the techs do this two or three times to make sure the level is right. Hey I dont have a dog in the fight, my answer to you is from a Hyun/Gen master tech with 18 years experience.

Here we go again !
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