If ANY of your rear suspension parts are worn out, the back end will feel loose. That includes wheel bearings, as previously mentioned, inner and outer tie rod ends, and lower ball joints. Any of them can cause what you're feeling.
Posts: 1962 From: Westlock, Alberta, CANADA Registered: Aug 2002
I had a drivers side A-arm, wher the metal bushing inside the rubber bushing was worn, and it didnt clamp to the cradle properly, and therefore was loose, and it was kinda scary when you would downshift or accelerate on the highway, and the back end would steer alittle. I soon changed the A-arm, and it is good now.
Posts: 7763 From: Royal Oak Mich Registered: Dec 2002
My thought would be to get an estimate from a professional repair shop. They've got lifts, tools and expertise to accurately tell you what the difficulties are, from there you can decide if you want to tackle the project yourself or let them do it at a later time.
The most important part is to get accurate information right away so you don't unnecessarily put yourself at risk in a 22 year old car with a loose rear end.
Posts: 1232 From: Germantown, Wisconsin - Metro Milwaukee Area Registered: Sep 2001
Fiero rear ends are fussy things. any peice back there can give ya an uneasy feeling. most common problems are the a-arm bushings & soft springs/struts. next most common is bad alignment. if your rear toe is bad - your rear wheels will fight each other for traction - and have BADLY worn edges. less common - but still important are the rear wheel bearings & axle nut, the rear balljoints & the rear tie-rods. these parts last alot longer than the above - but still are endlessly important to keeping the wheels straight.
and - of course - I have read this has happened here on PFF - not quite sure how - but someone managed to lose/break the rear cradle bolts. yes - that is the true loose rear end, eh?
Posts: 460 From: Titusville, Florida, USA Registered: Dec 2004
Having read all of the above, how about rusted frame rails?
I'm having the same problems with my 85 Sport, and have at this point, completely rebuilt my suspension, bushings, struts, shocks, ball joints, etc., etc. The backend on my car is "really squirally". I had the car professionally alligned at a shop that's used by many of the members of our Fiero club, always with good results.
I suspect I have a frame rust problem that's causing my backend problems. I'm in the process of inspecting my car for this now.
Marc in sunny Titusville, FL 84 SE - son's car, low milleage, loaded 85 Sport w/V6 transplant 85 GT just on the road
Posts: 371 From: Tucson, Arizona, USA Registered: Jun 2004