<BLOCKQUOTE>quote:</font><HR>Originally posted by BillK:
The first thing you have to determine is if the vibration is speed related, or engine rpm related ?? If it is engine speed related, the first thing you need to do is get a NEW fan clutch, not a junk one. I have seen them cause the exact type of vibration that you describe. I would stick with the clutch type fan as it uses a lot less power at high speeds than a fixed fan. The clutch fan only drives the fan when it gets hot, usually at low speeds in traffic. Once you get up to highway speeds, there is enough air flowing through the radiator that the fan really is not needed.
Hope this helps,
<HR></BLOCKQUOTE>bill, performmed your test and i fell that it is engine or engine attachment related. Nuetral: engine vibration noticable but not bad @4Krpm.
1st gear: noticable but not bad @4Krpm,
2nd gear: increasing in vibration noticability ( more pronounced feel
on shifter) @ 4K rpm.
Third Gear: more noticable on shifter @ 4Krpm
This test was performmed w/ the flex fan as this is when the vibration is constant, Wasn't constant w/ junk clutch fan ( but was present). Test proves that at a high RPM the vibration is amplified as the car speed increases. Could this be the flex fan reacting to wind forces created by vehicle speed (assumming fan is vibrating at high rpms). THe faster the engine turns, the more vibration is felt. Plan to purchace new clutch and fan assy: any suggestions on brand, style , diameter? Need both fan and clutch.