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Underbody braces, turbos and more!

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PostPosted: Wed Aug 15, 2012 2:02 pm 
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Joined: Sat Jul 14, 2012 1:59 pm
Posts: 14
Location: Austrailia
hey guys, i just replaced all of the springs in my car for 30mm lowered kingsprings and replaced the front struts. the car handles alot better in cornering and it quite alot harder than it was before.

when im out on the highway accelerating up through the gears, my car gets a nasty shake. the steering isnt shaking the entire car is. as soon as i let my foot off the accelerator it stops. i can cruise at 80kmp/h and its fine. hit the gas and the car starts shaking.

has anyone ever had this before? it only started after working on the suspension.


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PostPosted: Wed Aug 15, 2012 2:41 pm 
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Joined: Tue Oct 24, 2006 3:09 pm
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Location: Palm Springs: Too hot from June to Oct.!
Usually it is the last thing you worked on which screwed up the car.
So I'd go back and take a close look at what you did to the suspension.

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PostPosted: Wed Aug 15, 2012 3:06 pm 
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Location: Austrailia
most of it was done without a hitch, the only real problem we had was the drivers side axel. it come out of the gearbox when we dropped the strut out of the car. to get it back the strut back in we had to jack up the hub.

we were ready for the other side and held the hum the whole time so it didnt fall out. the new strut was in in about 5 mins. and the rear springs were done fairly quickly too.

what would make the whole car shake like that?


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PostPosted: Wed Aug 15, 2012 3:46 pm 
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Joined: Sun Jun 14, 2009 7:19 am
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Location: Plymouth, MI
An inner CV joint that has one of the barrel rollers out of place will cause the whole car to shake while under load. If the axle came out of the transmission due to a load on the outer spline, then the load was passed through the inner CV joint and could have caused the axle to extend far enough for a piece to get out of place.

I had an inner CV joint failure on my 98 1.3L sedan, and the symptoms were as follows.

No noise initially, noise developed over the next 100 miles, (I was 500 miles from home on a work trip so I could not stop driving it while I waited a week for a new axle, but I did fix it before driving home.) Even after extended time there was not much noise associated with this.
The car would shake under load starting at bout 20 MPH and reach a peak due to resonance at about 45 MPH. The resonance was the engine/trans shaking in the motor mounts. The shaking would taper off after this with minimal effects at highway speed. If your engine is mounted more rigidly, the resonate frequency will be at a higher speed.
Let off the throttle and no shake.
Very little shake transmitted through the wheel, with lots seen on the shifter.

Do not know if that is the problem, but give the center of the axle a good shake up by the inner CV joint and see if there is excess movement.

Thanks,
Andrew

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PostPosted: Wed Aug 15, 2012 4:23 pm 
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Joined: Sat Jul 14, 2012 1:59 pm
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Location: Austrailia
the symptoms you describe are exactly whats happening to my car atm.

if the inner CV moves does that mean it needs to be replaced? or can it be fixed?


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PostPosted: Wed Aug 15, 2012 4:54 pm 
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Location: Austrailia
one last question, if i remove the entire shaft will it drain gearbox oil?


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PostPosted: Wed Aug 15, 2012 5:40 pm 
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Location: Alberta, Canada
That is a textbook symptom of inner joint failure or issue. Yes it will drop a fair bit of gearbox oil when you pull the axle.

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PostPosted: Wed Aug 15, 2012 6:33 pm 
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Location: Austrailia
is the right hand side drive shaft actually in the gearbox or does it go through a mid shaft bearing?

if i can get away with pulling it out w/o droping oil i can do it at home.

im hopeing i didnt bugger anything up while driving it because i dont have the money to replace it.


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PostPosted: Wed Aug 15, 2012 6:38 pm 
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Location: Alberta, Canada
On 1.3 cars you can indeed do the axle without spilling any oil, as long as it will separate from the inner stub shaft, sometimes they get rusted together a bit.

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1995 Swift w/16V 4.39s, 3tech cam, Esteem t-body, Header, needs more.
1995 Gt Mustang "Boss Shinoda" package.
1999 F150 4x4 Supercharged
1967 Mustang 428 auto, never ending expensive project
1993 Civic si h22a, fell in my lap, couldn't resist!


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PostPosted: Wed Aug 22, 2012 11:50 pm 
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Joined: Sat Jul 14, 2012 1:59 pm
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Location: Austrailia
well i have had it apart and the CV shaft itself moved about an inch while it was in the car. definitly not good.

we pulled it all apart but didnt try too hard on getting the shaft off the half shaft. we managed to get it back into place but it still shakes the car. it looks like im up for a new CV shaft. my next question is whats the easiest way to get it off the half shaft? it was pritty stuck there.


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PostPosted: Thu Aug 23, 2012 1:04 am 
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Location: castlerock Wa,
penetrating lube first. hold the intermidiate up with one hand and use a BFH and strike the cv joint downward

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PostPosted: Thu Aug 23, 2012 1:14 am 
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Joined: Sat Jul 14, 2012 1:59 pm
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Location: Austrailia
ok cool, im not to worried about the shaft anymore as i dont think i can fix it. ill just have to replace it cheers :)


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