zerogrip

I am a new S2000 owner and have a few questions and hoped I could get some help from the locals. I have an 03 with 78K miles, s-tech springs stock everything else. I have noticed when accelerating in 3,4,5 gear with the RPM at 3-4K I feel a bit of a vibration at the rear of the car up untill about 6k. My question is do you think this could be the diff mounts or just the nature of the engine-drivetrain with that kind of load on it?

jerrypeterson

Do you experience the vibration only when accelerating?

mikegarrison

Jerry, I assume you are angling towards the CV joints?

Zerogrip, when the CV joints wear out, the main symptom is that the car shakes when accelerating. You can either get new CV joints by replacing the half-shafts, or you can pull them and swap the CV joints from one side to the other. That is sort of a band-aid fix, but it does extend the life of the CV joints. There is a writeup on this in the Under The Hood forum.

The problem tends to be seen quicker on cars that are lowered. I think Ray has gone through a bunch of CV joints.

RT

Band-Aid? what chu talkn' bout? Swapping the inner CV joint cups basically doubles the life of the part for free .... now that's a fuqing kick a$$ band-aid my friends

Here's a preview from the above hyperlinked thread:
[QUOTE=RT,Dec 29 2001, 11:18 PM]
Here what I got so far:

look at the Grand Canyon right @ 6 o'clock
here's a close-up:

all three sides that correspond to driving forward have the same deal going on!
I don't have a good way @ home to measure the depth of the divot, but it feels to be somewhere in the 30 thou range, pretty deep.

mikegarrison

I just meant that it doesn't actually fix the damage. It just moves it to the other direction. But yeah, unless you spend massive amounts of time in reverse, that's good enough.

RT

I just look at the date of my quote of myself and it's damn near 6.5 years ago! OG for sure at this point

jerrypeterson

All this air and the problem hasn't been root-caused yet... I thought you guys were engineers or something.

RT

root cause is under-designed part THE END

mikegarrison

Under-designed if you modify the car by lowering it, anyway. That definitely seems to be a contributing factor.

zerogrip

it only seems to happen under acceleration. It's not really bad and only seems to be when the car is in the higher gears. I do not feel this in first or second. Thanks for the tips.

I do have one more concern if you guys want to give it a shot too.

When driving on our ultra smooth roads I have noticed when running over a bump-uneven surface with the pass side rear tire it really upsets the rear of the car. Making the rear of the car twitch side to side. This is not the case with the drivers side rear though. My first thoughts would be a bad strut or diff mount.

any constructive thoughts are appreciated.