worlely Posted October 5, 2013 Share Posted October 5, 2013 Hi guys, im having a problem with my mondeo 2.0 tdci. iseem to have a knock coming from around the n/s of the car whenever iaccelerate and deaccelerate, but its not a very harsh knock as it doesntvibrate the car or go through the steering, its just more of a noisethan anything... i have managed to drive the car with verysmooth accelerating and gear changing to avoid the problem, but you canalways make it happen if you quickly press the accelerater or quicklylift your foot off the pedal. i jacked the car uptoday and took the wheel off and i can make it happen by rotating thewheel hub clockwise and counter clockwise - back and forth..the sound seems to be coming from the inner side of the drive shaft or the gearbox?iveread a few forums who suggest it may be the inner driveshaft bearing(UV i think?) or the diffrencial has gone and i'll need it rebuilt or anew box put in... any advise on what this is? and if its going to get worse?many thanks :) Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 6, 2013 Share Posted October 6, 2013 impossible to guess on something like this. are you doing the work yourself? Quote Link to comment Share on other sites More sharing options...
worlely Posted October 6, 2013 Author Share Posted October 6, 2013 hi thanks for the reply. well, if its the driveshaft, i guess its something i can do as its not necessarily complicated, but didnt want to go down the road of changing the part to find its made no difference and its gearbox related.. Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 6, 2013 Share Posted October 6, 2013 afraid its going to be process of elimination.when you're driving normally say,at 35mph in 4th gear,does it knock? does it do it,going round corners? Quote Link to comment Share on other sites More sharing options...
worlely Posted October 6, 2013 Author Share Posted October 6, 2013 ah, had a feeling you might say that.. to be honest, it does it in all gears, just depends if you can hear it due to wind/road noise.. i havent noticed any knocking at all when cornering like you would with a CV joint gone, although i did notice a slight vibration through the steering wheel when pulling off a few times today,nothing too bad, just the few knocks.. Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 6, 2013 Share Posted October 6, 2013 Mnmnn.im curious to know what it is also now. Does it do it,if you're coasting in neutral ? Quote Link to comment Share on other sites More sharing options...
worlely Posted October 6, 2013 Author Share Posted October 6, 2013 its weird isnt it??nope, no knocks at all when in neutral.. it only seems to do it when in gear and when accelerating/deaccelerating - as though there is play in the gearbox or driveshaft.. Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 6, 2013 Share Posted October 6, 2013 Are you meaning the single clunk ya get when changing gear or a clunk clunk clunk with each rotation of wheels? Quote Link to comment Share on other sites More sharing options...
worlely Posted October 6, 2013 Author Share Posted October 6, 2013 just a single clunk..but rather loud.. only seems to happen when you accellerate or cna easily make it happen by pumping the accelerator pedal... Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 6, 2013 Share Posted October 6, 2013 Thats normal on mondeo's. Play in the diff. DMF also doesnt help if it has play.My gearbox is brand new & has it. You tend to get this clunk on mondeo's if your revs arent right at time of clutch release. Dont worry Youll actually learn to drive using smoother gear-changes after a while. Ive heard it on a couple other mk3's. I can drive so i dont do it but every now & then i slip up & 'clonk'.lol Quote Link to comment Share on other sites More sharing options...
FOCA Posted October 6, 2013 Share Posted October 6, 2013 On the mk3 diesels there is an engine mount that is prone to fail over time as it has to withstand the torque reaction of the engine it is in the middle at the back of the engine/ gearbox - you can see it easily when the car is up high on ramps The Jaguar X-type is basically the same car as the mk3 Mondeo and the same x-type mount fits - i used a 3-litre petrol one on my car - its stiffer Quote Link to comment Share on other sites More sharing options...
stooge75 Posted October 7, 2013 Share Posted October 7, 2013 He can make it happen as he rotates the wheel/tyre by hand(you know,rotating tyre/wheel back n forth as if car was going forwards/backwards a foot). Its the final drive/diff play im sure hes on about. Could be mistaken though Quote Link to comment Share on other sites More sharing options...
Jinks Posted August 13, 2019 Share Posted August 13, 2019 Hi did you sort this out I have the same problem on a 06 st mk2 225 I have replaced driveshafts and mounts and running gear not the gearbox yet Quote Link to comment Share on other sites More sharing options...
Megh Posted June 4, 2021 Share Posted June 4, 2021 Hey anyone solved this ? I am also having same issue as mentioned above single clunlk When acceleration or de-acceleratiom. Quote Link to comment Share on other sites More sharing options...
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