Hi all hoping for some diagnostic help I've had a search but can't find anything that quite fits. Basically I have a sort of juddering/helicopter type noise that I think is coming from gearbox area possibly just behind but it's hard to tell!
Probably not uncommon but what's confusing:
1. Only happens in 4th gear between 25-35mph. Intermittency increases with speed until it just goes at about 35.
2. Doesn't always do it! Occasionally seems fine, sometimes louder than others.
3. Only does it under load, back off and it goes, so worse going up hills etc.
4. Seems worse from cold.
Initially I thought prop but can't see any play and I've greased em up made no difference. Gearbox seems spot on. No crunching, vibration, selection issues etc
Other thing I've noticed when it's had a long run it develops a bit of a clunk if on/off the throttle quickly but maybe not related? Always assumed that was just cos the oil in the box had got hotter.
Any suggestions would be appreciated!
Probably not uncommon but what's confusing:
1. Only happens in 4th gear between 25-35mph. Intermittency increases with speed until it just goes at about 35.
2. Doesn't always do it! Occasionally seems fine, sometimes louder than others.
3. Only does it under load, back off and it goes, so worse going up hills etc.
4. Seems worse from cold.
Initially I thought prop but can't see any play and I've greased em up made no difference. Gearbox seems spot on. No crunching, vibration, selection issues etc
Other thing I've noticed when it's had a long run it develops a bit of a clunk if on/off the throttle quickly but maybe not related? Always assumed that was just cos the oil in the box had got hotter.
Any suggestions would be appreciated!
hope it's as simple as that!
