One day these questions will stop, but this problem is really frustrating.
Whilst the Stag runs nicely and makes a lovely noise it does have one issue. Taking the car above 50MPH is near impossible with its vibrations.
I would say they probably start at around 30-35MPH from the rear when accelerating (slightly vibrating) before sounding and getting more intense at 50MPH. Pushing beyond 50MPH will result with the vibration taking over the car, with it making no difference as to whether the car is under load or not. To play it safe I stick below 50MPH (but of course this puts the car out of action for any long trip or motorways (lorries overtake me...)). Just before 50MPH arrives the diff will also whine. Once the car is warmed up it will also clonk quite a bit when going from drive into reverse or vice versa but it is fine if you go from drive to neutral to drive as well as if you perform the same procedure in reverse. A friend of mine called it the Intercity Stag LOL.
Compared a knackered inner CV on a driveshaft (I have experienced this twice on a MkIV Escort and a Mk3 Mondeo) I would say the frequency of the vibrations is quite a bit higher. I am sure the vibrations can also be heard (a bit like a train or ferry).
I have had the wheels checked and rebalanced, the propshaft looks to be brand new and I am told was made by a well renowned prop company near me (www.davemacprops.com). The UJs are in great conditon on the prop. It does have an aluminium toothed disc at the front (for a speedo) which is part of the front of the prop that is spigoted (however it does not come off the front of the prop).
One thing I will say is that the diff does leak oil via the front diff seal (in between the front nosecone and the front face of the diff), with the diff last time taking around 0.2 litres to bring it to the correct level (with it dripping slightly from the front shortly after I topped it up). The car has also been converted to a ZF 4HP22 auto 'box which has been reconditioned along with the torque converter by www.drivertransmissions.co.uk .
I was going to take it to Vibration Free (anyone here used them?) before I start testing props and buying other drivetrain components in an effort to locate the problem but what do you think is the issue?
Whilst the Stag runs nicely and makes a lovely noise it does have one issue. Taking the car above 50MPH is near impossible with its vibrations.
I would say they probably start at around 30-35MPH from the rear when accelerating (slightly vibrating) before sounding and getting more intense at 50MPH. Pushing beyond 50MPH will result with the vibration taking over the car, with it making no difference as to whether the car is under load or not. To play it safe I stick below 50MPH (but of course this puts the car out of action for any long trip or motorways (lorries overtake me...)). Just before 50MPH arrives the diff will also whine. Once the car is warmed up it will also clonk quite a bit when going from drive into reverse or vice versa but it is fine if you go from drive to neutral to drive as well as if you perform the same procedure in reverse. A friend of mine called it the Intercity Stag LOL.
Compared a knackered inner CV on a driveshaft (I have experienced this twice on a MkIV Escort and a Mk3 Mondeo) I would say the frequency of the vibrations is quite a bit higher. I am sure the vibrations can also be heard (a bit like a train or ferry).
I have had the wheels checked and rebalanced, the propshaft looks to be brand new and I am told was made by a well renowned prop company near me (www.davemacprops.com). The UJs are in great conditon on the prop. It does have an aluminium toothed disc at the front (for a speedo) which is part of the front of the prop that is spigoted (however it does not come off the front of the prop).
One thing I will say is that the diff does leak oil via the front diff seal (in between the front nosecone and the front face of the diff), with the diff last time taking around 0.2 litres to bring it to the correct level (with it dripping slightly from the front shortly after I topped it up). The car has also been converted to a ZF 4HP22 auto 'box which has been reconditioned along with the torque converter by www.drivertransmissions.co.uk .
I was going to take it to Vibration Free (anyone here used them?) before I start testing props and buying other drivetrain components in an effort to locate the problem but what do you think is the issue?
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