2008 Equinox has excessive road noise between 45 & 55 mph. Loud in general but really loud at speed.

Noises are decieving. Cud be steering system or wheels or suspension. If ball joint fails car cud flip ovr.hav pro testdrive it. Seek a gudguy at surecritic.com

hi
if the noise is there and it get loud as the speed increase
then check your wheel bearing.

Probably a broken seal somewhere around the edge of the windshield

have the drive shafts checked for failed cv joints , worn out disc pads and suspension rubber failures
Your "loud noise " comment is too generalized to get more exacting advice

your torque converter could have went. i feel its definetly your trans. i need more input

My thoughts exactly. Could also be an alignment issue (rear). It could be as simple as poorly balanced tires. Take it to a trusted mechanic. BTW: Just passed 125K on my EX.

I don't know how loud the noise is, but its weird that you mention 50 mph. At that speed or above you are keep a constant rpm level. I say this because it might just be your air box loose and the sound of the intake air is making it. A 2008 truck should not have any major problem. Sometimes an alternator will sing or whine but never heard anyone say something is whistling. One other thing is sometimes for some reason ive heard a noise like that coming from the speakers of my car that goes up and down with the speed of the motor, but that was when I was tinkering with speakers and sub outs and amps. Thats all I can think of.

It is at least one of your wheel bearings. I had all four of mine replaced before 40000 miles I hope that it is under warrantee

Find a quiet empty stretch of road. Go 50 mph, put the trans in NEUTRAL and shut the engine. If noise is still there, swing car left and right to detect noise differences. Could be hub or axle bearings. Not engine or trans if noise is still there. Hope this helps

It sounds like someone has been rough on the car. Your transmission may almost be shot, or you need a flywheel repair kit. If you get a flywheel repair kit, you can save your transmission. A flywheel repair kit is cheap. But a transmission aint cheap at all.