Rattling noise

Anybody know what this noise might be?? It only happens when I take my foot off the gas and when its cold out. I've had my timing belt and water pump changed and its still making that noise. If I accelerate, the noise goes away. I tried to post a short vid but site says something extension.

 

I have an 04 doing the same thing. But if i go under 20 it goes away. I have no idea driving me crazy

 

Won't do it when it idles so I don't know where its coming from. Prob front motor but its getting worse. I tried to upload a short video but it won't allow me. If I accelerate. It goes away

 

You can manually turn the throttle while under the hood to rev the engine, or have someone else rev it, then look for the source. I guess even with electronic throttle you can still do this.

 

I tried that.. The truck has to be moving. I wish I could post the noise

 

Upload the video to youtube then post the link here.

 

Without hearing it I am going to guess your center support bearing (also sometimes called the carrier bearing) that goes in the middle of the two pieces of driveshaft.

When I first got my 2000 PreRunner 2.7 with 150K miles on it, it made a noise upon deceleration that was similar to a screeching drive belt. No noise on acceleration. A review of the service records of the prior owner revealed a repeat complaint to Pep Boys of belt noise after water pump replacement and they repeatedly adjusted the drive belts. Turned out to be a bad bearing and a fairly cheap and easy fix.