Whining noise at 65mph+

Hello
I have a 2010 tacoma 5 speed. I'm having what sounds like a bearing noise (whirring) when I reach 65mph or faster and let off of the throttle or push the clutch in.(doesn't happen below 65.) It doesn't happen if the rear driveshaft is removed and driven in 4x4. I've replaced the driveshaft and rear diff. Anyone else had this problem and can help? I've purchased a clutch kit to replace all that but hoping someone can help before I pay to drop the transmission to replace something that doesn't need replaced.

 

Have you looked at your front wheel bearings? When driving straight at your speed slightly veer left and right and see if the noise changes or go away

 

Is your wife in the truck when it happens? That happens to me sometimes.

 

Yeah bearings are fine only happens when there is no load on the transmission

 

did you change the carrier bearing on the rear axle?

 

If you mean on the rear driveshaft, no my truck doesn't have one. I do have new rear wheel bearing to put on but the noise is coming from under the cab

 

yes, that's what i meant