Gthompson

Congratulations! Awesome truck!

I wish the tanks were larger so I don’t have to stop as much, but at least gas is cheaper than water!

Alright....I had a change of heart. The new truck is below.....don't ask me about trading a 3-week old truck in....it was painful! I'm happy though, that's all that matters!

Based on jumping into the other thread that Shawn Fox linked above, I'm trying to find a shop that has chassis ears to narrow down where it's coming from. When my leaf spring u-bolts were loose, I could clearly tell it was coming from the rear of the vehicle. It felt as though the spare tire was loose and banging around. After tightening that, the remaining clunk is farther up in the vehicle. Frustrating.

Don't do it! I don't want you keying in on some sound like I did. Enjoy your truck! When you pull into a parking lot and whip it forward to back into a parking spot, is your truck making a clunking sound during the transition? Or if go to pull into a any gas station or restaurant at slow speed, the small bump and angle you're taking it, does that make a clunking sound? Final example would be simply driving slow through a dirt lot (because there will always be some sorts of bumps).

The service manager did ride around with me and hear the noise. We then took another new AT4 around the lot and it did the same thing. I say around the lot because obviously it takes the smallest of bumps or uneven pavement to cause this. He then called a friend who has the 2019 AT4 and he mentioned that his does the same thing (obviously just taking his word on this). I have to find a dealer in my area that can install the chassis ears. That's the next step for sure.

Thanks, Jav_eee. Going to see if the same service manager will drive one of their custom lifted ones around the lot and see if it does the same thing.

Thanks for sharing, Shawn Fox. I have a 2020 AT4, I just traded in a 2019 Trail Boss. My AT4 has the same annoying sounds reported. Not necessarily in the rear end. I initially had loose u bolts for the leaf springs, so I could differentiate rear end noise from what this is. They tightened the u bolts and now I'm still left with this clunking (the rear u bolts did fix the feeling that my rear wheels were going to fall off, my truck still has less than 500 miles btw). It sounds as though it's from the center of the vehicle. Went to the original dealer and to a different one. They both point back to "play" in the rear differential. They demonstrated pushing on the rear of the vehicle. I also checked my old truck that was sitting on the lot, a brand new Denali, a used and a new AT4. They all have that axle slap and some rubbing when you push on them. However, my old truck didn't make this slow speed clunk as I drive through my neighborhood or any parking lot and I'm guessing it had the same rear differential. Honestly, not sure what to do next if the two service departments don't acknowledge it or look into it any further. How much would better shocks cost? And would that void warranty work going forward? I mentioned in my other post, it would be really hard for me to keep this truck with that annoying sound. I haven't listened to it from the outside, but I was pulling in to pick up some takeout and saw a Tundra owner staring at me funny as I clunked into a parking spot. He had to have been able to hear it! Drives me crazy! I ride around with no music playing just to listen to it!

Thanks, Shawn Fox. That’s interesting, going to jump into that conversation. I thought the same thing, I definitely don’t want a clunky 50+K truck. That’s insane to me. Also, considering I just traded a 2019 Trail Boss, which I would guess has the same rear diff with no clunking sound, it’s hard to believe. I’m going to post on the other thread as well. I hope this is the issue and it can be fixed, can’t imagine keeping this truck for long with it banging around from even pulling into a gas station. Also, good point about the play in the rear axle when you push on the side. I checked a brand new Denali, my old Trail Boss (that's sitting on the lot for sale), a used AT4 and a brand new AT4. They all do that, but I know my old truck didn't make this particular noise.

I just wanted a little more luxury in the interior. I didn't have the sunroof, cooled seats, etc. Was it a good move? Of course not, but I did get a lot of upgrades (10spd, 6.2L, sunroof, cooled seats, tailgate, wireless charging, all the cameras, etc.).

Traded in my 2019 Trail Boss for a 2020 AT4

Thanks for all of the responses, I took my truck to a second dealer, they confirmed that I’m just hearing play in the rear differential. They let me drive another AT4 around the lot, same issues. It’s just a clunky truck. Not sure how I missed it during my initial test drive. My last two trucks, 2019 Chevy Trailboss and 2013 F150 were quite a bit quieter.

Thanks for the responses. I have the 6.2L. As I mentioned, they tightened the leaf springs, but there could be more to it. As Davester mentioned, I just scheduled a service at a new dealer to have them look at it. Kchampagne, let me know if that leaf springs fixes your issues.

I'm having some issues with my brand new AT4. Just purchased a 2020 AT4 (2 weeks ago), had 24 miles on it. Within 100 miles it started making a clunking sound under the bed. Another 50, the steering started pulling and I had to take it in. Took it in and they tightened the u-bolts for the leaf springs which fixed most of the problem. The issue I still have is an annoying clunking sounds somewhere towards the middle of the truck, all the time. Happens at every stop sign, every turn, every speed bump. It's driving me crazy. The last time the dealer wouldn't even take it in. They said, "let us do some research before we bring it in." The suspension definitely doesn't feel like it did day 1, feels a lot "looser" and the clunking sound is tough to deal with. Anyone having similar problems? Find a fix for it? Thank you!