Transmission Repair or Overhaul? When Is a Rebuild Needed?

Many drivers with a gearbox problem come with the same question: "Can my gearbox be repaired, or does it need a complete overhaul?" The answer depends on where the fault is.

Repair: faults solved without opening the casing

Replacing or repairing a sensor, a wiring connection, a solenoid or the mechatronic unit is often done without opening the gearbox casing. Replacing a leaking seal can also fall into this group. In such jobs the gearbox can remain in the car or be only partly removed.

Overhaul and rebuild: internal damage

For a worn clutch pack, bearings, gear set or damage inside the casing, the gearbox must be removed from the car and opened. In such a job the internal parts are checked one by one; worn parts are renewed, the gearbox is cleaned and reassembled.

Symptoms pointing to internal damage

• Metal particles in the oil, or dark oil with a burnt smell
• A gearbox that will not engage or keeps dropping into limp mode
• Persistent slipping and rising revs caused by clutch slip
• Whining and noise from inside the gearbox

How is the decision made?

The decision is made from the read-out, oil check and measurements carried out before dismantling. Sometimes the measurements show that a simple fix will be enough; sometimes that a superficial fix will not work. We explain either case clearly in advance and proceed with your approval. This approach avoids both unnecessary cost and a second job when the first did not work.