2014 silverado weird transmission issue

[andrew st.aubin]

Hi everyone. I have a 2014 silverado 1500 ltz z71 4x4 about 150k miles. The other day I drove home from work and all was fine. Left later and the truck started acting weird. Under normal acceleration at around 45mph the truck acts as it is shifting up and down constantly or going in and out of overdrive this also occurs cruising around 70. I have herd a slight whine type noise at the lower speeds when it happens. There is no slipping at start and no shaking. Shifts still seem smooth. I called a couple transmission shops and they said I need a new transmission. Does this seem right?

[silveradosid]

have you changed the fluid and filter

[andrew st.aubin]

5 minutes ago, silveradosid said:

have you changed the fluid and filter

I have herd mixed things about doing a flush. But no i have not I was going to take the pan off today maybe and see what it looks like inside and change the filter and refill trans.

[Snowcamo]

Its just time for a rebuild. The clutch packs are worn and will be even morso if you swap the fluid. Good luck in finding a resolve man. 

[It's Tim]

1 hour ago, andrew st.aubin said:

I have herd mixed things about doing a flush. But no i have not I was going to take the pan off today maybe and see what it looks like inside and change the filter and refill trans.

Don't flush it unless you want instant death. If the fluid has never been changed changing it now will  probably only make things worse as new fluid is highly detergent and will loosen up the sludge .

As mentioned a rebuild is a more permanent solution.

Edited November 24, 2020 by It's Tim

[andrew st.aubin]

So pulled the pan to take a look here is what it looks like. Guess I gotta start looking at prices for a tranny.

[Trouble_shooting]

Oh man, that doesn’t look good!  It once was a nice red color; it now looks like used motor oil.  May your search find a good reputable trans shop.  
 

Please keep us updated on your progress.  We may find ourselves in the same boat someday, thanks