So I have this wobble problem and I feel like ive done just about everything in my power to resolve the issue with no luck. Problem is soley in the beginning for 2nd gear under certain load conditions. I feel a wobble [with no noise] through the floor board... it does not necessarily exhibit itself through the steering wheel. It feels like something is out of round, but as I said it only lasts between 1k-3k in 2nd gear. I have researched about every thread on this site and tried almost everything to fix the issue. I ruled out tires, examined my crank pulley, examined all of my engine mounts...etc....

The other day I decided to try the Vac mod and initially it seemed to have an affect on the sensation I feel. Great, so I thought yo-yo.... it has sort of come back the more I drive the car.

Could this still be some side affects of the yoyo? as in, should I go deeper into that particular issue? Could my vibe damper be going though it looks fine? bad axles?

Cars an 04, 38k miles. Ive added/replaced: engine mount [drivers], lowering springs, 15% pulley with oem heat range NGK platinums, alta intake, and a fresh service.

I will do anything to fix this but am tired of fruitless research and trial/error.

thanks!