Replaced ball joints and fitted superflex bushes on front end at weekend to cure vibrations as was getting this at approximately 50 mph but would drive through it.
Now getting no vibration up to 60 mph ,then whole car shakes but will not drive through it!! replaced subframe bushes last year. checked prop shaft !! any ideas???
cheers john.
Big vibrations
Re: Big vibrations
Can the vibration be felt through the steering wheel, the seat of your pants, or the rear transmission tunnel? Does the rear view mirror vibrate when it occurs?
Assuming the wheels are balanced correctly and that none of the wheels are out of true, the tyres are good with no bulges or deformed tread (classic car tyres can quickly become deformed with lack of use), then I can only suggest the front uj on the propshaft, the gearbox mounting having collapsed or gone spongy due to oil contamination. This is assuming that you have checked the engine mountings, and bottom ball joints and there is no excess play in the front wheel bearings (although if this was the case, it may disappear under firm braking?).
If a manual, I'd also try rotating the propshaft 180° at the gearbox end, and then the same at the diff end.
Failing that, are there any Triumph boffins in your area that may be able to sit in with you and give their opinion?
It's difficult without actually being in the car when it occurs!
Assuming the wheels are balanced correctly and that none of the wheels are out of true, the tyres are good with no bulges or deformed tread (classic car tyres can quickly become deformed with lack of use), then I can only suggest the front uj on the propshaft, the gearbox mounting having collapsed or gone spongy due to oil contamination. This is assuming that you have checked the engine mountings, and bottom ball joints and there is no excess play in the front wheel bearings (although if this was the case, it may disappear under firm braking?).
If a manual, I'd also try rotating the propshaft 180° at the gearbox end, and then the same at the diff end.
Failing that, are there any Triumph boffins in your area that may be able to sit in with you and give their opinion?
It's difficult without actually being in the car when it occurs!
Register Member no. 1596
1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red
1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red
Re: Big vibrations
Hi Johnny,
new gearbox mount, ball joints, poly bushes on front stays and track control arms, strut top mounts , track rod ends, wheel alignment, rear subframe mounts, wheels all balanced, engine mounts good, will take prop shaft off again and check it on the bench. Might try disconnecting the rear drive shafts and checking the joints too but they appear good not dry or rusty marks . The vibration is coming through the seat now I would say over 60 mph. Before it was below 50 mph with a steering shudder but you could drive through it.
cheers john.
new gearbox mount, ball joints, poly bushes on front stays and track control arms, strut top mounts , track rod ends, wheel alignment, rear subframe mounts, wheels all balanced, engine mounts good, will take prop shaft off again and check it on the bench. Might try disconnecting the rear drive shafts and checking the joints too but they appear good not dry or rusty marks . The vibration is coming through the seat now I would say over 60 mph. Before it was below 50 mph with a steering shudder but you could drive through it.
cheers john.
Re: Big vibrations
If you do remove each drive shaft to check them over, whilst the uj may feel OK with no play, they are prone to being 'notchy' in one direction - moving the shaft up and side to side will highlight any issue in any one plane. Also make sure they are lubricated - I use CV joint grease on mine.
I'd also check the sliding joint on the propshaft is properly lubricated and slides freely - they can seize. Is the sliding joint fitted at the front or the back (i.e. the propshaft installed the wrong way round)? There is actually no hard and fast rule about this, but generally it is recommended to be at the rear - if only to allow more clearance for the handbrake fork (just throw doubt into this, my manual cars are all at the rear except for one - my 1970 2000 which is fitted at the front (?!?), but there is no suggestion it has been off at all in it's life as it is a low mileage very original car..)
I would say that it probably is a driveline issue towards the rear rather than at the front, although that doesn't really help you that much...
I'd also check the sliding joint on the propshaft is properly lubricated and slides freely - they can seize. Is the sliding joint fitted at the front or the back (i.e. the propshaft installed the wrong way round)? There is actually no hard and fast rule about this, but generally it is recommended to be at the rear - if only to allow more clearance for the handbrake fork (just throw doubt into this, my manual cars are all at the rear except for one - my 1970 2000 which is fitted at the front (?!?), but there is no suggestion it has been off at all in it's life as it is a low mileage very original car..)
I would say that it probably is a driveline issue towards the rear rather than at the front, although that doesn't really help you that much...
Register Member no. 1596
1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red
1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red
Re: Big vibrations
Just to mention the prop is sliding at rear. UJs are greased with usual LM grease. The UJs on the rear drive shafts don't have grease nipples and are not on with circlips. 1977 model. cheers.
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