Violent shimmy/shake on 91 s13 hatch.....above 60mph only

[mosr20]

I have a 91 Hicas s13 Fastback

it used to shimmy every now and then.... but now it does it ALL the time above 60mph and shakes rather violently at that!

(Its the front end/steering wheel of the car that shakes)

I'm about to go NUTS as I've troubleshooted it a LOT and now I'm turning to you guys......

I have replaced the following with known good parts from parts cars I have on hand here already........these did NOT solve the problem....

Items I've replaced include:

1) tension rods2) changing the front tires (thought it might be an unbalanced wheel/tire but no3)put in another steering rack.....4) changed strut spring assembly in the front5) put Hicas hubs w/abs assembly on from a hicas parts car i have6)replaced lower control arms7) I even turned the abs off via pulling the fuse & fusable link to make sure it wasnt causing the issue......8) I checked the holes on the back side of the crossmember that like to wear oval shaped and they looked to be ok...... not much wear so that shouldnt be it (where the lower control arms bolt in)

I need some more ideas!!!

Please help!

Next I plan to replace the steering collumn but Id rather it not come to that......

if anyone has some advice -- please share~

thanks!

Damon

[Jung918]

Does it happen when stepping on the brakes, accel, decel, etc? Have you checked your tie rods?

[180fan]

When was the last time you got an alignment?

[hboninc]

ARE UR TIRES BALANCED

[irocknrol2]

it wouldnt be related to the steering column, it is something in the front end suspension that is worn out or broken. you should check an recheck the front tie rods ends, joints , etc. Have a shop look at the alignment. Sometimes paying a few bucks for a professional opinion of whats wrong an then replacing the items yourself is well worth it.

[BMAR240SX]

Take it to nissan i spent double the money going to shops and none of those ***holes fix it..i took it to the dealer to find out that the bushings were completly worn out(free check up) 200 dollar polyurethene bushings and 5 hours of hard labor....effect 100 mph with no shaking steering wheel