In this brief article we are going to discuss the Rear suspension issues that occur in the Ford Fiesta, what causes these failures and some troubleshooting tips.
The Top 3 Most Common problems with the Ford Fiesta Rear Suspension are:
- Rear Shock Absorber Leaking/Worn out
- Trailing Arm Bush Failure
- Rear Wheel Bearing Failure
Ford Fiesta Suspension
The basic front suspension of the Ford Fiesta has remained unchanged over the past 2 decades. It is a MacPherson Strut with A-arm and Anti-roll bars.
The Rear suspension is a Trailing Twist-axle beam with two rear shock absorbers and Springs. The Twist-axle (yellow arrow in the image below) is designed such that it performs the dual function of carrying the Wheel hubs as well as acting as an Anti-Roll bar. The axle itself twists every time the suspension undergoes roll motion.
Rear Shock Absorber Leaking/ Worn out
- Rear feels a lot bouncier than usual
- In some cases you get knocking/popping noises coming from the rear
- While going around a corner fast, you will find the rear end loses grip
Troubleshooting Rear Shock Absorber Leaking/ Worn out
- Ride and handling problems are generally due to the condition of the shock absorbers or struts
- The shock absorber might have either damaged a seal and started leaking or may have simply outlived its service life
- When tightening the shock mounting bolt, make sure the rear suspension is at normal ride height. If it is tightened with the wheels hanging free, then the bushings undergo extra twist and tend to fail faster.
- For any Shocks that do not come as a Strut, the manufacturers recommend you to “Start” then before fitment. What “Start” means is that you need to fully compress and decompress them atleast 3-5 times.
Most shock absorbers are stored lying on their side. So the damper oils may not be completely on either one side of the piston, before starting the operating cycle. Hence, priming is done to make sure that you have all the oil on one side of the piston and ensure correct damping forces when working within the suspension.
Trailing Arm Bush Failure
Symptoms of Trailing Arm Bush Failure
- Excessive Noise in the rear suspension
- Knocking Noises going over small bumps as well
Troubleshooting Front Strut Weak
- For the 2012 Model Bushing (6th Gen Fiesta), the Bush outer race is made of plastic, so it can be removed from the axle without needing to dismantle the shock absorbers or the springs.
- Dismantle only the trailing arm chassis bracket. Doing this will detach the axle from the chassis.
- Now drop the axle gradually by a screw jack already placed below in such a way that the brake connections are not stretched
- Remove the Bush center bolt and remove the chassis bracket, so that the bush is now fully accessible.
- Use a power drill to cut through the Rubber portion and separate the Metal boss from the outer race
- Now use a hacksaw to cut out the bush outer casing and push it out
Rear Wheel Bearing Failure
- Loud Droning Noise when going at speeds above 40 mph
- Sound seems to be low at low speeds. Sound increases with increased speed
Troubleshooting Damaged Rear Wheel Bearing
- Bearing failure generally happens as a result of end-of-life of the part. Normally a bearing would last upto 50K kms depending on usage and road conditions
- In order to remove the wheel bearing you would need to remove the Axle-Bolt and Brake Drum
- The wheel bearing is Press-fit into the Brake Drum. First the Retainer Circlip Ring has to be removed
- Next, you will have to push out the bearing.You will need a special collar and a hydraulic or Screw-operated Pressing Mechanism
- Press-fit the new bearing into the Wheel-hub cavity using the same mechanism but keeping the brake drum in inverted condition
In this brief article we have discussed the Rear suspension issues that occur in the Ford Fiesta, what causes these failures and some troubleshooting tips.