Shaking at high speeds.

MarkLinRacing · 03-07-2010, 08:24 AM

Quote:

Originally Posted by cre

I'm pretty sure a bad diff would do it, but it would be much worse when under a load as the problem would have to be pretty bad. I'd start with inspecting the brakes.

Brakes as in rotors?

I've never had a problem with rotors ever before until I cracked mine once on my RSX on the track.

But that was vibration only under breaking.

It seems like the car vibrates when accelerating, off-gas, or cruising in neutral.

cre · 03-07-2010, 08:39 AM

No, you're right about rotors, unless they were phenomenally screwed up they'll only cause issues when braking. I said the caliper glides aka guides, slides or rails. If one's sticking a bit the caliper can twist and apply more and more pressure (uneven) the faster the rotor moves. It's easy to check, pull the wheel off and unmount the rotor... if it doesn't slide on and off smoothly then take the glides off inspect for pitting, clean them and the caliper openings thoroughly, relube and mount them. Take it for a spin. It happened to my rear right caliper before and it took me forever to figure out what was going on... the wedge like pad wear finally clued me in (not to mention the difficulty getting that one caliper off and on).

Anyway, it's cheap to check it out.

03-07-2010, 08:39 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	No, you're right about rotors, unless they were phenomenally screwed up they'll only cause issues when braking. I said the caliper glides aka guides, slides or rails. If one's sticking a bit the caliper can twist and apply more and more pressure (uneven) the faster the rotor moves. It's easy to check, pull the wheel off and unmount the rotor... if it doesn't slide on and off smoothly then take the glides off inspect for pitting, clean them and the caliper openings thoroughly, relube and mount them. Take it for a spin. It happened to my rear right caliper before and it took me forever to figure out what was going on... the wedge like pad wear finally clued me in (not to mention the difficulty getting that one caliper off and on). Anyway, it's cheap to check it out. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Brake loss at high speeds	86.5 7MGE	MKIII Supra	15	10-28-2009 04:28 AM
rebuilt hard to crank (high engine resistance); need advice	cbrewster	MKIII Supra	4	09-28-2009 04:52 PM
Headlights only work on High Beam - is it a fuse?	t4yl0r10	Non-Generation Specific Questions	8	01-18-2008 03:56 PM
Speedometer, High RPM/Speed whine, High HC's 88 N/A	ravenmaster	MKIII Supra	8	08-13-2006 12:02 AM