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Chrissy

BMW 535d possible auto box fault?

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hi everyone,

im now to this forum and this is my first post! I have a bmw 535d on a 2006 reg. car as 94k on the clock. when car is driving below 30mph and i press the brake, the gearbox drops into neutral? surely not normal? its very snatchy and over revs when changing gear? sometimes also holds the gears too. Ive service the auto box and replaced the mecatronic seals. i set the oil level at 40 degrees. then reset the learned parameters using inpa. Ive had the gearbox updated to the latest software also.

If anyone could shed some light, any suggestions would be appreciated!!

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It will hold lower gears for longer when cold to help warm things up.

 

Its either low on fluid or has an internal fault.

 

If a clutch is cooked, a service won't help, it's a recon box at £2-£3k. But worn clutch sould store a fault code, but perhaps only after it's faulted and you have ad the red cog of death on your dash.

 

Read codes and double check fluid level.

 

If that draws a blank it wants to go to a transmission specialist.

 

But bare in mind engine faults can upset the transmission too, as can anything that provides an input to the wheel sensors. Check for fault codes in all modules.

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Hi thanks for the replies! Il double check the trouble codes in all modules but pretty sure there was none stored. The car has had a remap just before i bought it, also dpf has been removed. Could a poor remap cause these faults?

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16 hours ago, Chrissy said:

The car has had a remap just before i bought it, also dpf has been removed. 

 

Did you buy it knowing that?

 

It sounds a world of pain. 

 

It's illegal to drive on the road without a DPF and you'll get stung for it at MOT time.

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