TomoHawk Posted September 29, 2002 Share Posted September 29, 2002 My 78 280Z- At speed (~60 mph) on the freeway, I hear & feel something like rumbling. I was thinking that since the car was sitting for who knows how long before I got it, that the wheel bearings might be flattened? I will be replacing the rear tires in a month or so ($ flow is slow) so maybe the dried up tires are making the ride rougher. Front tires are new and the ride is nice w/ no crashing over RR tracks. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 29, 2002 Share Posted September 29, 2002 I don't think it'd be the tyres being dry.. My dad recently bought some wheels that came with some really nice yokohama tyres, but they were very dry feeling.. i thought he would've been a bit hesitant at putting them on but he did - and they were really great! have you checked out things such as your exhaust maybe being a tiny bit loose? Maybe the combination of higher rpm along the freeway and that much momentum makes it rumble around a bit.. do you get similar rumblings when accelerating hard at all? or at any certain rev ranges? or just that speed? who knows - you might be right about the tyres (it being just the rear tyres in this case) but i think it might be something else Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted September 29, 2002 Author Share Posted September 29, 2002 Yes, under hard acceleration, I get a loud rumbling. I thought it was from the transmission. Oh.. so the whole thing could be coming from the transmission, huh? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 30, 2002 Share Posted September 30, 2002 Driveline angularity perhaps? Its pretty common on hybrids, mine does it if your accelerating hard enough to vibrate things in the console pretty good. I'll fix it when I decide what I'm doing with the car and the rear end. Just an idea. Regards, Lone Quote Link to comment Share on other sites More sharing options...
Tim240z Posted September 30, 2002 Share Posted September 30, 2002 My $$$ is on the rear tires. Sitting in the same spot for a long time makes them oval. Try switching front to back, or just get them balanced, the tire shop can tell you if they are OOR (Out Of Round). Tim Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 30, 2002 Share Posted September 30, 2002 I will bet with Tim, and go on the tires. My experience with Datsun's is that they do not like out of round tires,uneven worn tires or out of balance tires. If the tires are a good brand, it is possible they may true up after a few hundred miles. Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted September 30, 2002 Share Posted September 30, 2002 Since Lone didnt say it (and I know he was thinking it)...could your rumbling be a bad case of gas? Sorry, couldnt refuse. Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
Guest silverbullet Posted September 30, 2002 Share Posted September 30, 2002 I would also bet on the tires being the problem, you already probably decided this but I would wait untill you get the new tires and then see what happens, I have seen more than a few cars with vibration/rumbling problems after sitting for extended periods, could it also maybe be rear wheel bearings? I just replaced mine about a year and a half ago, they both went bad at exactly the same time just like clockwork and I would say at speeds over maybe 20-30mph they sounded like a real low rumble/growl and I could just barely feel them. Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted September 30, 2002 Author Share Posted September 30, 2002 I will probably replace the rear wheel bearings when I get the shocks replaced. Front ones I might even do myself. Fronts shouldn't be too hard. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 1, 2002 Share Posted October 1, 2002 Tom.... sounds like you have come down with the highly contangious hybrid z malady known as "change everything". Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 1, 2002 Share Posted October 1, 2002 Sometimes known as snowballittis in extreme cases it can take 12 years to complete J/K Pete.. Of course his time shows on his car thats fo' sho'. Regards, Lone Ps: I should talk, I'm at over 2 years now and even though I'm driving mine, its so far from complete its not even funny, I just had a mild outbreak of snowballittis I guess that occassionaly flares up when I get some $$ Quote Link to comment Share on other sites More sharing options...
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