Hi Hamish,
Check over all tyres, one may have a wear flat spot or else a bulge due to tread delaminating. Can happen to heated tyres on higher speed trips during hotter weather. Or a tyres out of balance, lost the lead balance weight.
Cheers.
Ken.
-----Original Message-----
From: MIKA <dobson_hamish@yahoo.com.au>
Sent: Tuesday, 22 January 2013 10:52 PM
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Vibration:( 85-110 km/h) in and out of 4th gear
Hi all I just drove to Bribie island from Mackay ~1000km
During the journey I heard a anoying rattle. I thought it was a empty soft drink can in the passenger wheel well.... About 2 hrs later I realized it was the gear stick ..... I touched it and it felt like a concrete vibrator at 110km/h.
I backed off in 4th gear and at 80 km it was kind of unnoticable. Then as I squeezed on the throttle it started to strongly vibrate ( the whole car) at about 85 km/h through to 110 very badly (like a harmonic balancer fell off) I pushed it further to 120 and even 130 but I sence the frequency of the vibration just increased it to a point where there was no harmonic and therefore less intensive a feeling.
I am running a decoupled now for ten plus years.
Previously I had a bad high speed/ high load resonating noise vibration which turned out to be a rear wheel brn failure.
My viscous coupling was emptied and filled with fiberglass 10 years ago. Never been a prob.
About 1 year ago rudi on Bribie swapped out my tailshaft as my uni's were on the way out. That was when he found the faulty rear wheel bearing causing the frustrating high speed resonating vibration.
I'm up set as I don't know the cause and I had a stressfull 14 hr trip.
All I did was rotate my tyres.
I have noticed the rear gear box front nose cone has developed a leak / weap.
What is strange is at 120 km/h in 4th the vibration is awful and if I pop it out of gear into neutral the vibration remains unchanged.
I'm thinking it has to be related to wheel speed.
Therefore brearings, cv's, diff gears dif bearings....tyres and tailshaft abd decoupled.
Any help would ge appreicated
Hamish dobson
0400792026
Sent from my iPhone
Check over all tyres, one may have a wear flat spot or else a bulge due to tread delaminating. Can happen to heated tyres on higher speed trips during hotter weather. Or a tyres out of balance, lost the lead balance weight.
Cheers.
Ken.
-----Original Message-----
From: MIKA <dobson_hamish@yahoo.com.au>
Sent: Tuesday, 22 January 2013 10:52 PM
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Vibration:( 85-110 km/h) in and out of 4th gear
Hi all I just drove to Bribie island from Mackay ~1000km
During the journey I heard a anoying rattle. I thought it was a empty soft drink can in the passenger wheel well.... About 2 hrs later I realized it was the gear stick ..... I touched it and it felt like a concrete vibrator at 110km/h.
I backed off in 4th gear and at 80 km it was kind of unnoticable. Then as I squeezed on the throttle it started to strongly vibrate ( the whole car) at about 85 km/h through to 110 very badly (like a harmonic balancer fell off) I pushed it further to 120 and even 130 but I sence the frequency of the vibration just increased it to a point where there was no harmonic and therefore less intensive a feeling.
I am running a decoupled now for ten plus years.
Previously I had a bad high speed/ high load resonating noise vibration which turned out to be a rear wheel brn failure.
My viscous coupling was emptied and filled with fiberglass 10 years ago. Never been a prob.
About 1 year ago rudi on Bribie swapped out my tailshaft as my uni's were on the way out. That was when he found the faulty rear wheel bearing causing the frustrating high speed resonating vibration.
I'm up set as I don't know the cause and I had a stressfull 14 hr trip.
All I did was rotate my tyres.
I have noticed the rear gear box front nose cone has developed a leak / weap.
What is strange is at 120 km/h in 4th the vibration is awful and if I pop it out of gear into neutral the vibration remains unchanged.
I'm thinking it has to be related to wheel speed.
Therefore brearings, cv's, diff gears dif bearings....tyres and tailshaft abd decoupled.
Any help would ge appreicated
Hamish dobson
0400792026
Sent from my iPhone