Knocking at rear when going at 70mph

Its very good that you quickly observe this, nd its gona save u some money, bcos such faults can fry the automatic clutch fibres,and the gear ratio likewise,,,its the speedometer sensor that's faulty , so if u can fix it now,.it will not affect the valve body,,nd it wilk save u from changing the whole gear box

Have you had a four wheel alignment done recently? Do you replace all the links in their entirety, or just the bushes? If just the bushes, try an aftermarket set of poly bushes?
what happened just before 70k? Did you have a crash? Did you damage the axle/housing (bent rear axle)?
please tell us how you solved this problem as it could help someone else in the future..thanks.

Hi, Sounds like the clutch plate or converter is starting to go.
At 250 K. It is time for a new one.(clutch and/or converter).
Another thing which I hope it isn't. Water in gas. If it is dump some alcohol in the tank, sold at many auto shops.
Good luck

You might have somebody press the pedal as you get down and check the clutch travel. Might have an adjustment on the clutch arm.
Could have wrong pressure plate, did you match them. I would check the travel first.

check the ball joint if u have independet rear suspention is the shock loose

you are probably thinking of a master or slave cylinder going bad making you unable to disengage your clutch.( very unlikly on an 09 ) even if this happened, you stiil have control of the gas pedal, and could pull the shifter into neutral as a last resort, im almost beting you heard this in traffic court

Have your mechanic ck for a possible issue with the pilot bearing. if the clutch linkage is indeed full travel, then the clutch should be "disengaged" and the only thing left is a pilot bearing (which should be replaced at every clutch replacement) or there is a problem with the disc. If clutches dont last 100k miles it either the driver or cheap parts.

There are two common known problems with the rear suspension. One problem is the rear spring colliding with the rear lower arm during rebound. This is caused by a lack of support in the rear lower arm and the upper spring seat. The solution is to fit a spring isolator sleeve to prevent the metal to metal knocking. Another common problem is knocking of the top coils of the springs. A revised rear lower arm spring seat has been fitted since 02/2002.



Source: http://www.bba-reman.com/content.aspx?content=ford_focus_common_problems_and_solutions

its probably your bump stops. the vw ones are very soft. i bought ford escort (the shape after the xr3) ones and cut them a little down to fit. i think the noise is either your shock touching or the sound of the tire scraping the body of the car. hope this helps.

first check the clutch hydrolic fluid. If it's low or leaking, it may not disengage the clutch completely causing the disk to drag (and smell) The knocking sounds like you're loosing the thowout bearing and/or possibly the disk (there are cushion springs that may have come out of place). Take it to a transmission shop that does free diagnosis. anything other than fluid-related is going to be pricey.

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