Bad Transmission fluid pump

Dersch · November 30, 2020

My trucks currently in for an engine knock and a loud whine they think its the pump. Google research shows a pump can definitely whine and matched my symptoms. Didnt see much in the way of engine knocks though one user did reply he had a similar noise in an older gen that was fixed by replacing the pump. So my questions are...

Has anyone heard of a pump failing yet?

Can someone explain exactly how the pump works/ what it does? My guess is pump fluid through tranny...

Is there any long term implications i should be worried about with a brand new truck developing these symptoms at 11k miles? It was driven a while like that because no shop wanted to look at the truck and they for a long time didnt know what was wrong. Worrying about internal damage done to truck potentially.

Is an engine knock (once trucks warm) generally associate with the pump?

Thanks!

silveradosid · November 30, 2020

engine knock would reference the engine oil pimp, not the tranny

JimCost2014 · November 30, 2020

13 hours ago, Dersch said:

It was driven a while like that because no shop wanted to look at the truck and they for a long time didnt know what was wrong.

Why is that? Have you made aftermarket changes to the truck?

What year and model is it?

Dersch · November 30, 2020

2 minutes ago, JimCost2014 said:

Why is that? Have you made aftermarket changes to the truck?

What year and model is it?

2020 LT trailboss

I took it to a shop the first available appointment. First shop had it 2 days said nah nothings wrong.

Same day took it to a 2nd shop city next to me they refused to look at it and i quote said "its normal to make noise like that... you have a warranty man just drive it"

Finally a few days later i got it into a 3rd shop who has now had it for almost 3 weeks

Truck has bigger tires is all. Otherwise bone stock. One tried to tell me an aftermarket exhaust would cause this which i said its stock look under the truck. No cold air intake. Nothing. And obviously its too new to even program.

As far as i have seen no one has brought my truck in with these symptoms so im assuming that was a big reason cause even the shop its in now clearly isnt positive whats wrong with it

JimCost2014 · November 30, 2020

2 minutes ago, Dersch said:

2020 LT trailboss

I took it to a shop the first available appointment. First shop had it 2 days said nah nothings wrong.

Same day took it to a 2nd shop city next to me they refused to look at it and i quote said "its normal to make noise like that... you have a warranty man just drive it"

Finally a few days later i got it into a 3rd shop who has now had it for almost 3 weeks

Truck has bigger tires is all. Otherwise bone stock. One tried to tell me an aftermarket exhaust would cause this which i said its stock look under the truck. No cold air intake. Nothing. And obviously its too new to even program.

As far as i have seen no one has brought my truck in with these symptoms so im assuming that was a big reason cause even the shop its in now clearly isnt positive whats wrong with it

When you say shop, are you talking about dealerships?

I would never take it to an independent shop while under warranty.

Dersch · November 30, 2020

Just now, JimCost2014 said:

When you say shop, are you talking about dealerships?

I would never take it to an independent shop while under warranty.

Sorry yes. I mean dealerships. Its never been anywhere but a dealership service department. Shop is just easier to type

JimCost2014 · November 30, 2020

10 minutes ago, Dersch said:

Sorry yes. I mean dealerships. Its never been anywhere but a dealership service department. Shop is just easier to type

Yes it is.

Now you are finding out dealerships do not like to try and fix someone else's warranty woes. Hopefully 3rd time is the right shop.

newdude · November 30, 2020

Any chance you can record your truck and post a video/sound clip here?

Dersch · November 30, 2020

22 minutes ago, newdude said:

Any chance you can record your truck and post a video/sound clip here?

Dersch · November 30, 2020

1 hour ago, newdude said:

Any chance you can record your truck and post a video/sound clip here?

Thats the only video i have unfortunately. As you can see this was taken under vehicle. At time of video knock was only heard under neath and whine only with windows down.

By time i got to 3rd vehicle knock could be heard in drivers seat with windows down and whine with windows up and radio on

Edited November 30, 2020 by Dersch