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Discussion Starter #1
hey guys hope someone can shed some light i have a early 2000 x plate 330d auto m sport only 75k

what is does is if i accelerate quick then release throttle as it changes gear i get a thud from the rear like the diff is jumping if you drive the car on power or normally this doesnt happen only for e.g its in first i accelerate to 4000rpm then release throttle compleatly i get a thud from the rear as it changes to second it does it in other gears but more noticable in lower gears
i took it to the garage thinking the bushes or donught was knackered but the said they all look fine and it looks like its coming from inside the diff and was diff slap and recommended i take it to a diff/gearbox specialist which i did

after a couple of miles drive the specialist says its not the diff its the gearbox:jaw-dropping and told me he thinks its holding onto the pressure to long before it changes or something causing the diff to act irratic he did recommend i get the engine and gearbox software upgraded by bmw but this feels like a mechanical issue not software as the gears change fine and its more noticable when car warms up

has anyone ever heard of this? or know somewhere in london i could take the car who aint gonna rip me for a gearbox for the sake of it?
any help would be great

oh and gears work fine picks up smooth ive done over 3000 miles in the bmw in the last month with no hiccups apart from if i release throttle quick to slow down or something.
 

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will be summat worn on the drivetrain on a car that age as mentioned the diff bushes the most likely but could be other things its a consequence of the high torque of the engine..
 

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Hi i dont know whether this will be helpful to you....i had the same problem and dealers said its the habit of the car for the diff to clunk...i got irritated took it to a indy, and they said one of the diff bushes had slight play...i got them change the diff bushes, subframe bushes and the propshaft coupler with the centre support bearing. the problem was not only the diff bushes, the propshaft coupler thought it looked fine, it was knackered...it was identified only when it came off...
 

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Discussion Starter #6
Anyone know anyone repatable i could take the car to in london im in north west london as both gagrages i took the car to say its not bushes maybe i need a bmw specialist
 

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Have the codes read mate. Had a similar problem with my 323i coupe. Turned out to be the TC and ABS sensor.
 
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