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Start with the rear. Most likely a brake problem. 2 things to look at. First the emergency brake cable. Make sure the cable is kind of loose. If not it is locked/rusted and applying the brake. Gets worse as you drive. Cut them close to the brake or replace them. Next is the rear brake hose/s. To check this, if the brakes are tight, release one of the brake bleeder valves. If it releases the brakes, replace the hose. Hard steering could be the power steering pump or gear box, or bad ball joints. This you'll have to look at the steering linkage. Ball joints, pitman arm, idler arm. Any of these look really rusty at the connection. Could be a problem. Look at the steering shaft also. There is a u joint that rusts up and will cause hard spots when turning. Gear boxs usually get sloppy. Power steering pumps start to whine when going bad.
If the steering wheel shakes while applying the brakes, you have warped brake rotors, and they need to be replaced. A shake all of the time may also be another issue, as in tires out of round, out of balance, or bad tie rod ends.
i've had a similar issue with a 99 M3. really stiff steering. i thought i was getting old and weak.
I was chasing another problem when i discovered a solution for my stiff steering issue.
Most of these vehicles have a valve that helps control steering pump fluid flow at various speeds.
i.e at higher speed you want stiffer steering. at low speeds easier steering. however, how does the pump known your going faster?
Note: all bmw steering hoses leak...
As your car ages, so do electrical contacts, especially in harser climates.
I used eletrical contact cleaner and di-electric grease to solve an intermittemt ASC problem.
This also cleared up the steering issue.
get some electrical contact cleaner and some di-electric grease. pop your hood and clean as many electrical connections as you can and apply a little di-electric grease after the contact cleaner drys.
even do the dme.
Note: I have replaced the power steering rack twice before i discovered this fix. You may also fix some other issues in the meantime.
electrical contacts may be the biggest problem source for most newer vehocles since they tie everything together.
Hi You don't actually have to bleed a power steering system as such, its not like a brake system. If the fluid bottle was empty and you refilled it, or you have replace the steering pump then it's only a simple operation.
Ensure that the power steering fluid is topped up.
Start the engine.
Turn the steering wheel to full lock in one direction until you hear a hissing type sound which is the relief valve.
Then do the same as #3 in the opposite direction.
Do this about 3 - 5 times per side.
The hissing sound should get quieter as the fluid gets around the system
Recheck fluid level.
The power steer system should operate as normal after doing the above.Hope this has helped, let me know how you get on.
I had the same problem, there is a cooling fan for the power steering pump that went out and caused some damage to the pump. The intermitent problem finally got worse and I had the pump replaced read: expensive about $1000. See if they have a rebuilt pump available.
2006 f350 crew 4x4. Replaced p/s pump,booster,put gauges to check pressure? Fluid clean, lifted in air to check steering linkage and turning without load. Still baffled ! I work at a Ford dealer and mechanics said its normal. Thats BS! I replaced the p/s pump so im guessing the screen was new with the pump. I will check for the hell of it. I have a feeling it is suspension under load. The symptom on this truck is not turning when brake applied. Also hard turning when vehicle is on and in park,wont turn.