My shifter vibrates as soon as I reach 60mph. All my mounts are suspension fine, according to my mechanic. I was told by many mazda specialist that my u-joints from my drive shaft are worn out. I have to get a new rebuilt shaft or remove mine and take it to the shop so they can install replaceable u-joints. My question to you is, I have an extra shaft but don't know what year it came off. Is there a marking on the shaft that tells me what year it came off from. I heard that from 83-85 the shafts are the same from a 12a and 13b. Is that true. I think $240.00 for a new shaft at Mazdatrixx is to expensive. All they do is change the u-joints and use the same rod from a used shaft, right. I have a shop that will replace my old u-joints and balance the shaft for $100.00. Can I go this route?

 

If it is just your U-joints you can do this yourself at home. If I remember right it is either a 10mm or 8mm wrench. New u - joints and a hammer to knock the old ones out. No need in buying a new shaft if it is just the u - joints. $100 to have it done is a bit steep IMO!

 

would that be the only cause of the shifter vibration?

coz mine does it pretty badly aswell

 

Unbalanced tires can cause it also. Did on mine anyways.

 

i dont think thats it coz i got new tires fitted and ballenced..

ii think it might be my flywheel mismatched with something

(thats what the guy at rotomotion said.. but he didnt really help at all)

 

Your transmission mounts may be shot also. You need to do a little investigating before throwing $at it.