1. Describe the behaviour precisely

Explain whether the problem affects forward gears, reverse or both, and whether it occurs when the car is cold, warm or at all times. Jerking, slipping, delayed engagement and grinding are observations—not diagnoses by themselves.

If you know whether the car has a manual, conventional automatic, dual-clutch or CVT transmission, include it. Otherwise, the model, year and VIN can help identify the specification.

2. A useful gearbox-fault checklist

Only record what you already know or can verify safely while stationary. There is no need to repeat the fault for the camera.

If a garage has provided fault codes or a repair estimate, include the full document rather than one figure without context.

  • Can the selector be moved and can neutral be selected?
  • Does the car move forwards or in reverse?
  • Are warning messages or transmission lights displayed?
  • Is there slipping, jerking, grinding or delayed engagement?
  • Is fluid visible beneath the car?
  • Has a garage provided a diagnosis or repair estimate?

3. Do not force an unsafe test drive

Stop attempting to move the car if it does not engage, lurches unexpectedly, makes a severe grinding noise or has a substantial leak. Repeated testing may worsen the fault and make the vehicle harder to collect safely.

A car that cannot select neutral or has locked wheels needs a different loading plan. Mention this before collection instead of trying to drag or tow it with unsuitable equipment.

4. Repair or sell in its current condition

A repair estimate should include diagnosis, oil or fluid, mechatronics or clutch work where relevant, removal and refitting, parts and possible hidden damage. A quoted component price alone rarely represents the full cost.

Compare the total cost and expected post-repair value with an as-is offer. The better option depends on the model, condition, demand and certainty of the diagnosis.

5. Photos, documents and handover

Provide exterior views, dashboard warnings, the selector area and any safe-to-photograph leak or damage. Also show the car’s position and access if it cannot move under its own power.

Record the known behaviour or garage diagnosis in the written contract. Confirm whether the car rolls, brakes, steers and has keys before agreeing the collection method.