03-31-2014, 04:47 PM
Join Date: Jul 2011
Location: Davao City Philippines
This is what I do in cases like this. Lift all 4 wheels off the ground with hoist or on 4 jack stands. Have someone in the car to run it up the speed when you feel the vibration while you are under the car observing. I almost always find the issue this way.
Could be many things, from bent shaft to faulty U-joints or even bearings . So that is hard to say. But your chances are good you will see/feel the problem when it is under somewhat of a live load. Sometimes it helps to have your helper apply a very slight pressure to the brakes to force more load to the driveline components.
Just PLEASE do be VERY careful under there with all the spinning shafts/wheels etc.. Okay ?? No loose clothes anything like that. Just saying. :-)
Also if you use jack stands, please make sure there is no way they could slip/shake off. You are going to be spinning it up to road speeds... Use you head, no one gets hurt.
ASE Certified master auto tech of 38yrs
Owner of [URL="http://davaogarage.weebly.com/index.html"]Quantum Mechanics[/URL] of Davao City
77 Mercedes 300D
73 Mercedes 220D
02 Suzuki Carry Van Auto EFI
11 Suzuki Thunder
02 Nissan Terrano Auto 2700 turbo 4X4
"Courage is being scared to death, but saddling up anyway"