This could be the fix you're looking for.
Grinding noise, I mean, when for instance you're driving that range rover, land cruiser, or Honda accord of yours, down the road; and you suddenly notice that as you accelerate more, the more you hear a kind of DEAFENING NOISE coming from either the front end, or rear end of the car. Sometimes, you might just not know exactly where the noise is coming from.
From my experiences working on cars, the following are the likely suspects:
1. Worn out tires. If the internal material makeup of a tyre has expired, or failed, terrible noises are transmitted. Reason being most tyres are nylon/steel belted, and can produce terrible noise.
ADVICE. So, be careful the kind of 'Tokunbo' tyres you buy for your car.
The durability of a durable and reliable tyre, doesn't necessarily has to do with the threads and neatness of tyres.
2. Front wheel bearing hub assembly. What aids the smooth movement of your car's tyres is the smooth movement, less frictional force of the bearings on the hubs(where you attach your tyres to). With time, lubrication in the bearings of the hub assembly, tend to degrade with time, causing an increased frictional force. Its this lack of lubrications of the bearings(commonly called Boris), that produces the grinding noise during driving.
Wheel bearings come in two types. Sealed and non sealed bearings.
Sealed bearings, are already factory lubricated, and after the greases shelf life, the grinding noise starts. You've no option, but to replace it.
Non sealed bearings, are factory lubricated, but can be relubricated.
ADVICE. Water, or a flooded terrain is its enemy. If possible, avoid flooded areas as much as possible.
3. Unlubricated/worn out driveshafts inner bearings, or inner driveshafts housing. The bearings on driveshafts are protected by the rubber like housing, from diets, grits, and even moisture laden corrosion. A torn driveshafts boot, would hasten corrosive activities, and attendant wear.
ADVICE. The next time you visit a repair or an alignment shop, do ask for the driveshafts boots be inspected for ruptures, and relubrication.
SOLUTION EMPLOYED
*replaced the disintegrated ball bearings on the driveshaft at the passenger side. See figures.1, and 2.
*regressed the passenger side driveshaft inner housing with light lithium based grease. Don't use heavy based grease please.
*the front passenger side wheel bearings were all replaced with a new one.

I hope this piece helps someone out there.
PS: Parts herein are from a 2005 Sienna I had worked on last month.
Ensure you actually carryout a test drive on the job done, to confirm it, before making payments to your mechanic.