Smash
New Member
I've looked all over the place for info on this, but no luck finding a clear answer so far.
My transmission seems to have developed a bit of a clunk when setting off and when getting back on throttle after coasting. If I'm in D and I let the car creep first, there is no clunk when I apply throttle. However, if I take my foot off the brake at a standstill and go right to the throttle, even light application results in a big clunk which you can hear and feel through the floor.
The same thing happens when I get back on the throttle after braking and coasting. I've had to start very gently tapping the throttle to allow everything to re-engage before getting back on the throttle properly to prevent the clunk from happening.
The clunk sounds a lot like a metallic 'thunk' and it sort of feels like the clutch is taking too long to engage and is then suddenly kicking in which causes the whole car to jerk or as if there's a lot of slack suddenly being taken up by the driveline.
Once in motion, the car and gearbox are absolutely perfect. No slow shifts or weird behaviour at all. Nice and smooth.
The car is on 36k miles and has been well looked after (though its relatively new to me). The gearbox and haldex were last serviced in 2019 (about 3000 miles ago). The clunking issue was not there when I got the car and seems to be getting a bit worse over time. I have launched the car twice since I got it and I think that may be where it started. The car has a forge intercooler and milltek exhaust so its a little up on stock HP.
It's worth mentioning as well that I had an inner CV joint fail a while back and I replaced the whole FL driveshaft which fixed the issue (car was juddering really bad on throttle). The FR driveshaft has not been replaced yet, doesn't seem to have any issues, but I have one ready to go in. I figure I may as well do both, to keep everything 'even' and on the same maintenance schedule. The new ones are much beefier looking too.
So, my initial thoughts are that either an engine or trans mount has failed/is failing. I know its a common issue and I know this car has been sat in dry storage for a long time which may have caused the mounts to get brittle. I've also read that low or bad oil in the gearbox can generate similar symptoms, but it was serviced not long ago, there's no visible oil leaks and the gearbox is otherwise perfect once the car is in motion.
Is there anything else that I should look? What's the best way to check the gearbox/engine mounts?
Thanks all.
My transmission seems to have developed a bit of a clunk when setting off and when getting back on throttle after coasting. If I'm in D and I let the car creep first, there is no clunk when I apply throttle. However, if I take my foot off the brake at a standstill and go right to the throttle, even light application results in a big clunk which you can hear and feel through the floor.
The same thing happens when I get back on the throttle after braking and coasting. I've had to start very gently tapping the throttle to allow everything to re-engage before getting back on the throttle properly to prevent the clunk from happening.
The clunk sounds a lot like a metallic 'thunk' and it sort of feels like the clutch is taking too long to engage and is then suddenly kicking in which causes the whole car to jerk or as if there's a lot of slack suddenly being taken up by the driveline.
Once in motion, the car and gearbox are absolutely perfect. No slow shifts or weird behaviour at all. Nice and smooth.
The car is on 36k miles and has been well looked after (though its relatively new to me). The gearbox and haldex were last serviced in 2019 (about 3000 miles ago). The clunking issue was not there when I got the car and seems to be getting a bit worse over time. I have launched the car twice since I got it and I think that may be where it started. The car has a forge intercooler and milltek exhaust so its a little up on stock HP.
It's worth mentioning as well that I had an inner CV joint fail a while back and I replaced the whole FL driveshaft which fixed the issue (car was juddering really bad on throttle). The FR driveshaft has not been replaced yet, doesn't seem to have any issues, but I have one ready to go in. I figure I may as well do both, to keep everything 'even' and on the same maintenance schedule. The new ones are much beefier looking too.
So, my initial thoughts are that either an engine or trans mount has failed/is failing. I know its a common issue and I know this car has been sat in dry storage for a long time which may have caused the mounts to get brittle. I've also read that low or bad oil in the gearbox can generate similar symptoms, but it was serviced not long ago, there's no visible oil leaks and the gearbox is otherwise perfect once the car is in motion.
Is there anything else that I should look? What's the best way to check the gearbox/engine mounts?
Thanks all.