I am thinking the vibration is coming from the auto trans but not sure. Vibration is always pesent but it occurs most(heavy) at rpms below 3k- usually crusing under light load. Any help welcome.

 

bump

 

front u-joint on the driveshaft?

 

yep i vote for the u-joints too cause mine was vibrating too and i bought the driveshaft with the replacable u-joints from mazdatrix for like 250$ with the transmission real seal and now you can feel anything smooth as glass

 

WOW hey i have the same problem..cant figure it out...Vibration shakes steering wheel...its a pulsing vibration...comes gos comes gos every second or so.. on freeway its bad ..if i put it in nutral and coast its worse..then when i put it back in drive and sometimes it goes away..If it comes back i put it in nutral and rev up and put it back in drive and it gos away..sounds like the same problem you have>??? i have a AUTOmatic also Btw

 

So I believe I remember that the u-joints can't be replaced on the stock driveshaft?
I need to get a aftermarket like mazdatrix if this is the case?
I will look at the FSM for check of the driveshaft/u-joints...