The 2008 BMW 530d E60 is experiencing a malfunction in its automatic transmission.

[DMGRS]

Greetings, gentlemen.

The automobile is a BMW e60 530d 2008 with a power output of 173kw and lci.
Occasionally, the zf6hp26 automatic gearbox is experiencing malfunctions. I have had this issue, namely a gearbox malfunction, several times while travelling on a highway. The scenario is as follows: I am driving at a speed of 70mph in the 6th gear. However, when I attempt to accelerate further, the gear cannot be downshifted, resulting in the activation of the LIMP mode. This mode causes a loss of power and restricts me to using only the 1st, 2nd, and 3rd (or 4th, depending on the speed at which the issue occurred) gears. Subsequently, I halt, deactivate, and reactivate the engine, resulting in its flawless operation once again, encompassing all six gears. However, if I attempt to accelerate and transfer gears after driving at a speed of 60mph for a few minutes, the vehicle reverts back to LIMP mode.

If I am experiencing a cycle of acceleration, deceleration, and then acceleration again, it indicates that the gears are functioning properly. When I drive at a consistent pace for a short period of time, I notice that the RPM arrow on the dashboard moves erratically instead of indicating a gear change when I push the accelerator. If I continue to accelerate, the vehicle ultimately attempts to shift gears but fails, resulting in a fault.

Furthermore, I have observed that while I am driving uphill with the cruise control engaged, it ceases to function and displays a deactivation message on the dashboard. However, I am able to maintain the same speed by applying pressure to the gas pedal, but if I push too forcefully, it results in a loss of power and triggers a transmission fault.

The oil, pans, and all the seals were replaced, but it did not provide any improvement. The clutch is in good condition. I suspect that the mechatronic component is the root cause of the problem. However, is there a method to precisely identify the specific malfunction?

Hopefully it is comprehensible, I used my utmost effort to explain the problem.

Expressing gratitude

[xsports]

Visit an independent technician who will do a diagnostic scan to identify any error codes.

[Black_raven]

Did you neglect to install a mechanical sleeve while doing the oil and pan procedure?

[DMGRS]

As previously stated, all seals, including the mechatronic sleeve, were replaced.

[Black_raven]

However, you suggest that the mechanical sleeve might be the cause.

[KWILB]

I infer that the individual is referring to the mechatronic unit, since they simply state their belief that the mechatronic device is the cause of the issue.

[KWILB]

Bring the vehicle to an automotive gearbox professional who will be able to accurately identify and analyse the issue for you.

[MDMH757]

Providing us with the specific geographical location of the automobile would enable us to suggest local experts that specialise in gearboxes.

[DMGRS]

Aberdeenshire, Scotland

[MDMH757]

Mackie's in Glasgow, which I vaguely remember being positively mentioned on this list before, is worth considering.

[Ken_Lion]

OP - this indicates that the clutch packs are deteriorating, most likely clutch E. By doing a vehicle scan, it is possible to detect an issue related to the Ratio Monitoring Clutch, namely either an E or C mistake. The one enduring solution to address these problems is to rebuild the gearbox. I have encountered the same issue and used all of the temporary purported remedies, however none of them prove effective in the long term.

The issue often arises from the failure of the internal bushes in the gearbox, necessitating their replacement. The most viable course of action available to you is to reconstruct the box. Consider installing a pre-owned gearbox, but be aware that if it has had comparable use, you may have the same problem after a few hundred miles.

[Ken_Lion]

Contact the aforementioned company by dialling the provided phone number: https://reengineeredtransmissions.co.uk. Their pricing for a warranted and completely guaranteed complete rebuild, including fitting, are far lower than those offered by other providers.