Hi I have a rattling sound coming from my landrover freelander and the suspension feels no good at all the little humps in the road feel like they are a lot larger than they are but my question is is

Do you have a spare tire , jack and lug wrench in trunk or under the car? they loosen up sometimes & make banging & rattling noises if not secured properly.

There is not much to come loose there because the suspension bolts are typically torqued tightly. Does this rattling only occur when the car is rolling, or will it happen at idle. Assuming it is when rolling, I would recommend having someone drive the car on some bumpy road and run beside the car to get an idea where the sound is coming from. There is just too much insulation in the car to get a good feel for it. Also, do you hear it if the window is down, or just with the window rolled up. I would make sure that your coolant reservoir is held tightly with the 3 screws that hold it on. It is possible that the person who last did your oil change did not reattach those screws (the reservoir has to be removed to get access to the oil filter). Maybe post more information with information about when you hear the rattle, and where it sounds like it is coming from. I have often found issues running beside a car. If it is a constant clicking sound, then it may be a failing CV joint.

check in trunk first for loose objects ie. tools spare tyre other,check under rear of car for same ie,lose exaust mounting brackets ect.

it sounds to me like you have a faulty injector from the symptoms you suggest would get injectors tested
one thing you can try when car is running if you slacken injetor pipes one at a time .you should find the faulty one if thats your problem

Check the exhaust mounts on the rear silencer box 1st. Give the rear box a gentle shake. if this seems ok, the check the bushes on the rear suspension bars and mounts these look like long rods coming from the axle to the chasis. then take the rear wheels off look at the rear springs and mounts.

sounds like something in the drive train. like a universal joint. or back lash in the differential.I would check your wheel bearing too.one thing the faster you go the faster the drum roll? would be in the drive train.

usually its the sway bar links that rattle horribly,it sounds like the suspension is falling out...but its not, the sway bar links are usually pretty cheap and not bad too replace,if you can get under the car grab them and give em a good pull ans u will usually feel a little play in the ball and sockets on the ends of them,hope this helps,or have your hand on one and have a friend rock the car side to side and u might feel it then

Check your shocks or struts. Also, the tires could be out of balance, or worn very thin.

Matt, sounds like a suspension or exhaust noise. Grab onto exhaust (engine cold) at several locations (car supported securely so u don't get crushed) and wiggle, tug pull, kick, etc to see if u can get it to make any noise from hitting anything. Look for evidence of the exhaust rubbing against something, by looking for shiny metal due to contact w/ something. Also push up and down on the body of the car as violently as possible to simulate going over bumps. Pay close attention to heat shields around or on the exhaust system, if they are loose, they will make a racket.
And, as I said, possibly the suspension is making the noise, but not as likely, pushing up and down on the car body as described above might reproduce the noise. If it isn't the exhaust (my 1st choice), give me more clues if u can. good luck countrycurt0

half shafts can cause a lot of problems with shifting and driving. but you could be loosing the third gear syncronizer.