I have a saab 2004 2.0 93 linear -what would cause front end vibration on acceleration?

SOURCE: I have front end vibration

just checked this out a while ago:



Wheel Hub Assemblies: Systems and Diagnosis of Worn Hub Assemblies & Bearings
Front wheel hub assemblies and bearings control the position of, and reduce the resistance of, vehicle wheels in contact with the pavement. When they fail, front wheels may not be kept in position and vibration and noise usually develop. Symptoms that normally develop as a result of these worn parts include:

• A humming, rumbling or growling noise which increases with acceleration or as the vehicles turns
• Vibration felt in the steering wheel, which changes with vehicle speed or as the vehicle turns
• Looseness or excessive play in the steering wheel (especially while driving over rough road surfaces)
• A loud, constant grinding noise when driving the vehicle (heard in the most severe cases of a wheel bearing failure)
• Pulling to one side when braking.
• Roughness - with the vehicle of the ground, roughness or vibration when rotating the wheel
• Looseness - with the vehicle off the ground, looseness when wiggling the wheel back and forth (Looseness may also indicate a worn ball joint)
• Excessive brake pedal play can also indicate sloppy or excessively loose wheel bearings
• ABS failure in the system may be related to failure of the ABS sensor in the hub assembly or the internal sensor in the wheel bearing

SOURCE: front end shakes when accelerating

The desciption you gave is exactly how it feels when you have an axle with a bad inner CV joint. It won't make a "clicking" noise like when you have a bad outer CV joint, but will shake pretty bad on accel. If you crawl under the car while it's on the ground (don't lift it) and grab on to the axle close to the inner CV joint and wiggle it, there shouldn't be very much play in it. If there is play in it, replace that axle.

SOURCE: 2001 Impala,

Has to be a drive axle,most likely an inner joint,should be able to feel the play if one is bad (jacked up to let the wheel spin freely).
Also. If the front suspension is weak,or lowered, the CV axle will bottom out in the inner plunge cup and make a terrible vibration.

Testimonial: "You Called it !! Both axles were worn out at inner joint left boot blownout dry barings, right axle needle barings gone,baring floating around inside"