datrat240

Niiiice! Now that's something you don't see every day(night)! Especially not in oz!

The tyres seem to be wearing with no cupping or scalloping, however a little "camber wear" is evident. I just had the tyres swapped left to right on the rims and re-balanced at a tyre shop on sunday, If I spin the wheels by hand with the car on the hoist my rims appear to run true, and the tyres have no noticeable visual runout. I've done thousands of kays with this problem on all kinds of different road surfaces and the wobble is there on all of them. It does get more noticeable the faster I go, So say at 90 it is just noticeable, at 100 it has definitely set in, and at 110 is worse yet, and for the sake of curiosity I found out that it is worse again 150 (on my own private racetrack of course! ). About a month ago was my trip to pedders for a 28pt check and instructions to look for possible causes of wobble, I was informed that my rack, rod ends, lca bushes and ball joint were sloppy and likely they all contributed, hence I replaced them all. My last alignment (castor, and toe front and rear) was done manually by yours truly, so could be a contributor, I'll get it professionally done in a week or so (including camber) to try to eliminate it as a cause (though I can't imagine alignment CAUSING a wobble, only aggravating it) The discs appear not to be warped, however I guess they could be out of dynamic balance, does anyone know if/where I can get them checked for this? I'll also try having a different tyre shop balance my wheels, It's worth a shot ey? Failing all of that I will borrow a friend's wheels and give them a go. After that, i'm clueless! Actually I did notice that the rubber steering column coupler is fairly floppy, but all of the other ones i've seen are the same, maybe I should just put one of those solid ally ones in to be sure? at least they're cheap! Thanks for the replies so far, I'll take it all on board and update the thread as i get nearer to a solution.

Thanks for the prompt reply! I forgot to mention in the original post that I have also replaced the front discs and pads too, no difference, although they are cheaper (reliance slotted) discs, not OEM. So I guess that is a possibility, though i get no braking shudder or odd pedal feel, and no "brake pad push" so i am disinclined to chase that up just yet. I might borrow a friend's wheels and give it a try, just in case both of my sets of wheels/tyres are ovoid or out of balance..

So.. I have this problem as the title states, On the highway (i.e. above 90kmh) I have a steering oscillation, feels like a wheel out of balance, not severe, but ANNOYING! So far I have: -Tried and re-balanced two sets of wheels -Home string line, and shop laser alignment -Replaced steering rack and tie rod ends with low k's(tight) 2nd hand items -new polyeurethane rack bushes -replaced upper and lower control arms with just jap adjustables (no rubber bushes) -replaced castor rod with just jap rose jointed items -HSD HR coilovers And It still happens! I'm almost ready to drive the damn car into a tree! It is a 93 R32 GTS-T, 170,000 kms, The wheels are 18x7.5 apec apache, with hub-centric rings, with toyo proxes-4 wrapped around them. The car now handles fantastic, go kart like, with great steering feedback, but i still feel this "highway wobble" I cannot feel any noticeable vibration through the chassis, only the steering wheel. occasionaly the problem goes away for a minute or so, then comes back, so basically, I'm stumped! Any Ideas? Please? I'll take any suggestions! I'm desperate!