I have 2000 Accord EX V6 of 185000 miles. There has been vibration and noise while driving since last July.
When gear in N, add gas and rpm goes 3000+. No vibrates.
Recently, it was found that side engine mount and rear transmission mount were broken. They were replace. The vibration and noise remains.
Engine mount control system was checked according to 2-20 of Haynes Repair Manual for 1998-2002 Honda Accord. No issue was found.
Front wheels were raised and the car was on Jackstands. Take 2 front wheel off. Start engine.
in Park, no vibration.
in N, no vibration
in Drive, vibration while 2 wheels are turning.
By accident, it was found that:
in Drive, no vibration while the wheel of passenger side is turning and driver side is not.
It could be easily repeated now:
In Drive, pressing brake pad on the wheel of driver side makes the wheel doesn't turn. Only passenger side wheel turns. No vibration and no noise.
CV axle was checked. CV axle of driver side was uninstalled. no leak. It was compared with the one in Autozone. no issue was found.

When it's in vibration, all mounts are moved and the rear engine mount appears to move more.

Please help me to identify the cause. Thanks.

 

What happens if you switch the front passenger and driver's tires?

 

Tires were rotated. It didn't help. To exclude tire or wheel related issues, 2 front wheels were taken off when testing.

 

I went through two sets of Autozone axles before purchasing replacement axles from Raxles which fixed my vibration problem. Whatever axle you get make sure it has the vibration dampner (rubber ring near center of axle).

None of my AZ axles had this and Raxles did. Might be difference. However, the pax side axle was part of my problem alos and these don't have the vibration damper.

good luck

 

Thanks, TexasHonda. I opened inboard boot of my axle. One corner of a roller was broke.
The axle must be replaced. In rush, I got a remem axle from AZ. The engine is no longer vibrating from side to side. Due to uninstallation and installation a few of times, a boot of ball joint broke. Brought the boot from Honda (P/N: 51225-S84-A01 ) and installation was not hard.

 

Good job! I hope the AZ axle works well.

good luck