BMW E34 automatic transmission slipping and most common faults
E34 automatic transmission slips or jerks - what causes it?
Often the oil level is too low or the filter is clogged. Slipping wears the clutch packs, so avoid driving. Simply topping up the oil is not enough: the oil and filter are changed, because old dirt stays in the filter.
What is the typical fault of the BMW E34 540i's 5HP30 automatic?
The plastic balls in the valve body wear, typically at 150,000-250,000 km. Symptoms include a stuck pull-away, creeping in N and reverse not engaging. For the repair there is ZF's repair kit 5HP30VBK, or the balls can be replaced separately.
What oil goes into the E34 automatic transmission?
The correct oil depends on the gearbox: a black type plate means Dexron and a green one Esso. Wrong oils can ruin the gearbox. The V8 model's gearbox has no dipstick, so the level does not need to be checked separately if the gearbox does not leak and works.
What does the E34 automatic's limp mode mean and how do I clear it?
The gearbox goes into limp mode and the car moves sluggishly. The mode usually clears when the ignition key is turned to position 0, if there is no other fault. The cause can be cracked engine or gearbox mounts. Also check the main fuse.