Mini Clubman Diesel Automatic Gearbox Issues

The symptoms you describe for your Mini Clubman are highly indicative of a faulty transmission control unit. The inability to shift with the paddle shifters, coupled with slippage, unclean shifts, grinding noises, slow response, and emergency mode activation, all strongly suggest electronic malfunction within the transmission's control system. The error code stored in the memory would be crucial for a definitive diagnosis. Could you provide the specific code, if available? Furthermore, has the transmission fluid level been checked recently, and was its condition assessed? A low fluid level or contaminated fluid can, in certain circumstances, mimic control unit issues. However, given the totality of the symptoms and the mileage, electronic failure appears to be the more probable cause.

Thank you for the prompt reply. I do not have the specific error code at hand, regrettably. The transmission fluid level was checked and deemed adequate. Regarding the electronic failure, is there any possibility of a repair to the transmission control unit, or is replacement the only viable solution, in your assessment?

Given that the fluid level is confirmed to be adequate, and in light of the symptoms you detailed, the failure is likely internal to the transmission control unit itself. While component-level repair of automotive ECUs is sometimes possible, it is often impractical due to the complexity of the units, the specialized equipment required, and the difficulty in sourcing replacement components. Furthermore, even if a repair is attempted, there is no guarantee of long-term reliability. In this scenario, replacement of the transmission control unit is generally the recommended and more reliable course of action. Recoding or reprogramming of the new unit may also be necessary to ensure proper communication with the vehicle's other systems. I recommend consulting with a workshop that specializes in automatic transmissions to confirm the diagnosis and proceed with the appropriate repair.

I appreciate the comprehensive diagnosis. After consulting with a qualified technician, the transmission control unit was indeed identified as the source of the problem. Replacement was performed, and the issues have been resolved. The cost aligned with your estimation. Thank you for your assistance.