Signs of automatic transmission slipping on a Ford Focus:
* Delay when shifting gears
* Slippage when shifting from first to second gear
* High engine speed without accelerating the car
* Burnt smell when shifting gears
Possible reasons:
Problems with gearbox mechanics:
* Worn friction discs
* Clogged valve body
* Faulty solenoid
Transmission fluid problems:
*Low fluid level
*Old or contaminated fluid
* Wrong fluid type
Electronics problems:
* Faulty speed sensor
* Damaged electrical wiring
Possible solutions:
* Check the transmission fluid level and condition. Add fluid or replace it if it is old or dirty.
* Have your transmission diagnosed with an OBD-II scanner to identify any possible trouble codes.
* Have the transmission diagnosed and repaired by a qualified mechanic. Repairs may include replacing friction discs, valve body or solenoids.
*Consider rebuilding the transmission if it is severely worn.
Precautions:
* Do not continue to drive the vehicle with a slipping transmission as further damage may result.
* Be careful when driving the vehicle, the brakes may be less effective due to transmission slippage.
* Have your transmission repaired as soon as possible to prevent more serious damage and costly repairs.