Still vibrating/shuddering between 45 and 60
 

Hey guys, I've seen many threads on here regarding this issue. I have a 2002 v6 that is vibrating/shuddering between 45 & 60 mph. It only does it when your maintaining your speed with slight acceleration. If you coast through the same speeds it does nothing and if you are powering through those speeds it does nothing as well...

Today I replaced the plugs, wires, coil pack, fuel filter and air filter and no change.

Anybody else have any recommendations on what I should try next? Thank you guys for your help!

Wanted to get this back to the top... Probably started it at a bad time... Hope you guys have some suggestions for me! Thanks!

Any check engine or service engine soon lights? I noticed my V8 doing this just before the SES light came on. Coded to upstream oxygen sensor. Seems much better since replacing it. I plan to replace the other one ASAP. If no engine light, you might see if there are any codes. Read somewhere about someone failing inspection because the Service Engine Soon light was faulty. The truck was throwing codes but not turning the light on. Had to fix that and then check on any other codes.

Auto or manual? Does it do it in diff. gears?

I have the same problem. On my thread someone mentioned turning the OD off. If it smooths out it the transmission solenoid.

When's the last time the drive-shaft u joints were changed?

No CEL or any other warning lights. I'll check to see if there are any codes tripping...

Drive shaft u-joints have never been replaced...

Oh, and my OD button is broken... Will have to fix that to determine if it could be the solenoids...

This happened to my truck, check your pcv hose and elbows, once they start leaking air into the system it will feel like you have a slight miss/ shudder under load