2015 6.2 trans noise

[WVRigrat05]

My 15' 6.2l is up to 69k miles and the last 5-7k it's been making a swishing or pressure bypassing sound when the converter locks and I get a shutter once in a great while when giving it gas, was curious what your thoughts were, flush fluid or converter going out? Bone stock minus air filter and intake tube.

 

[Mike L.]

They are known for having converter problems. I hate the one in my truck. Ask James Carter about it. It is the worst trans I have ever driven.

 

[Chevy1925]

^^seriously, im surprised mike puts up with that shit!

 

[Mike L.]

You know what I'm waiting for James.

 

[WVRigrat05]

So looks like the converter is going out? Wonder how long it has? It's under warranty still I believe

 

[Mike L.]

So looks like the converter is going out? Wonder how long it has? It's under warranty still I believe

Don't guess at it. Have a good tech put a scanner on it and watch what the converter is doing.

 

[WVRigrat05]

That's the problem around here, not very msny good shops or dealerships close, I'll see if I can do a vin check and see how long the warrant is good and ask around for a good shop

 

[WVRigrat05]

Asked about it on here and mentioned warranty and it quit today, lol, my luck. Thanks again Mike and James

 

[Chevy1925]

Sum bitch, that sucks Reger.

 

[KyleC4]

Asked about it on here and mentioned warranty and it quit today, lol, my luck. Thanks again Mike and James

Hopefully if shops are bad out there they just put a trans in it for you. Especially if this is the 8L90 in your truck. If tech has never been into one they don’t know about all the updates and changes. It’s not listed in GM service information either.

 

[WVRigrat05]

Hopefully if shops are bad out there they just put a trans in it for you. Especially if this is the 8L90 in your truck. If tech has never been into one they don’t know about all the updates and changes. It’s not listed in GM service information either.

Hopefully, it started making the sound again this morning, so I'll take it in and have it looked at, got a couple recalls need fixed anyhow

 

[036.6turbo]

That's the problem around here, not very msny good shops or dealerships close, I'll see if I can do a vin check and see how long the warrant is good and ask around for a good shop

Global Warranty Management

[TD valign="top"] Valid Description Warranty Add Date Start Date Effective Odometer End Date End Odometer Applicable Warranties Valid warranties are highlighted Special Coverage N182202780 07/28/2020 04/25/2015 16 MI 04/25/2025 150,016 MI Powertrain Limited Warranty 07/28/2020 04/25/2015 16 MI 04/25/2020 100,016 MI GMC 2 Year Scheduled Maintenance 07/28/2020 04/25/2015 16 MI 04/25/2017 24,016 MI Bumper to Bumper Limited Warranty 07/28/2020 04/25/2015 16 MI 04/25/2018 36,016 MI Corrosion Limited Warranty 07/28/2020 04/25/2015 16 MI 04/25/2021 100,016 MI Emission Select State Component Ltd Wty 07/28/2020 04/25/2015 16 MI 04/25/2022 70,016 MI Emission Select Component Ltd Wty 07/28/2020 04/25/2015 16 MI 04/25/2023 80,016 MI Special Coverage N192289390 07/28/2020 04/25/2015 16 MI 04/25/2027 180,016 MI Emission Limited Warranty 07/28/2020 04/25/2015 16 MI 04/25/2018 50,016 MI

[/TD]

 

[NC-smokinlmm]

There is an atf fluid or additive to fix it, have dealer flush it and refill with new fluid or whatever they add to fix it.

 

[Mike L.]

There is no addative that will fix noise.

 

[Chevy1925]

based on the VIN ran, they already tried the new fluid (possibly the additive) early on in the trans life.

 

[NC-smokinlmm]

Time for upgraded converter, might as well throw in a cam while your at it...

 

[KyleC4]

The fluid for the 8 speed was revised about 3 times. Claimed first batches were hygroscopic. We never were instructed to put in any additive. Just fluid exchange.

 

[WVRigrat05]

I'm gonna figure out the noise first, my guess is converter issue since it only makes the noise when it locks, window has to be down to hear it, if it's going, I'll slap one in it, can't do cam and stuff right now, oilfield money days are gone for a while, gotta save til things need fixing for now