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View Full Version : Harmonic Shudder - Help please..



BiG 4 CyL
23-02-2011, 02:22 PM
Hey guys,

As well as needing new rear brakes, the car has been shuddering between 40-55kph under acceleration.

Outside of those speeds its clean as a whistle.

Now I've had different suggestions as to what the problem could be and am chasing some other opinions.

The suggestions so far have been:

-Drive shafts (specifically inner joints)

-Control arm / sway bar bushes

-Wheel alignement & balancing

What are your thoughts and advice?

Got a big trip coming up so need to troubleshoot asap ...

Thanks in advance!

Tim

magna buff
23-02-2011, 06:30 PM
I wondered if you think it may be the clutch pressure plate

I am driving a manual these days and
it still shudders at that speed
if I dont get the revs right

you have done more than 200000 huh

could be wheel balance and alignment prob

or how old are the cvs/driveshafts

your running newish shocks and good engine mounts
cleaned the injectors ..no balance shafts in the motor
new harmonic balancer
so not sure .......still thinking

magna buff
26-02-2011, 04:37 PM
other thought was that dissy plug in giving trouble again

lower ball joints /lower control arm bushes been done ?

BiG 4 CyL
01-03-2011, 10:35 AM
Update:
ok had the car checked over and these are the findings...

Subframe Bushes - oil soaked and perished, appx 1cm of movement
Subframe Bolts - Missing, the bolts that are present arent even home.
Control arm Bushes - oil soaked and perished
Control Arm - Passenger side; resting on the subframe itself, zero clearance
Drivers Side; less than an inch clearance, approx 1cm of freeplay
:tired:

BiG 4 CyL
01-03-2011, 10:35 AM
oh...

Front Engine Mount needs replacing and rear trailing arm bushes....

hurrah

BiG 4 CyL
02-03-2011, 11:14 AM
New update...

After further inspection the subframe and crossmembers are warped/twisted and unfixabled, in need of replacement....
Threads are stripped to buggary, bushes are gone and bolts have literally fallen out.

is this possible without tamper/sabotage? it seems like someones fully messed up my subframe and cost me the car... its completely unroadworthy!!!

magna buff
02-03-2011, 05:05 PM
with good paint

refit everything you have
thats good from your car

we could do that on a long weekend
put in a new clutch while engine is swapped

so you dont loose your investment