BMW E32 automatic slipping or not shifting

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Why is my E32 automatic slipping and not shifting?

The most common cause is worn clutch packs (friction plates), which means the gearbox needs a rebuild. The packs can also be destroyed because the oil pump tube has broken. Loss of drive can also come from a turbine fault.

Why does the automatic only shift at around 6000 rpm?

The cause can be a faulty speed sensor, which is in the differential and not in the gearbox. Another possible cause is a stuck kickdown switch or a loose wire, which makes the control unit think the throttle is fully open.

Is it normal for a cold automatic not to shift above second gear?

When cold, the gearbox deliberately shifts later so the engine warms up faster. If it does not shift up at all even when warm, the fault is most likely in the electronics.

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