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hi all. i really need some advice. i have had a vibration problem on my 200tdi disco for quite a while now. it sort of feels like its vibrating the whole truck ie you cant really feel it through the steering. i have changed the uj's on the front prop, and i have just changed the front bearing on the output shaft on the transfere box. but the vibration is still there oh and i have checked all levels.....and all wheels and tyres have been eliminatedany ideas what else i can check.?????im lost now
Ok so time to check the wheel bearings. The CV support bearing is inside the stub axle, oddly enough around the end of the CV joint. Depending on what type of axles you have there are a variety of bearing types, 2 main ones on Disco and RRC. The roller bearings used on ABS axles tend to be the ones that colapse but on high mileage non-abd units the bronze bush bearing can wear away especially if the swivel oil has leaked away.
If you've got the ABS axle and have the roller bearings on the CV it's easy, they will collapse. Some had a solid bronze bush-bearing but I think that was Defender.On the RRC without ABS you will find either a solid bronze bush or a laminted one on later models with dimples in the surface to hold oil It the cv is very loose in this it's toast but TBH it has to wear a lot, unless it's broken up. There is also a bronze bush inside the swivel to axle flange to support the half shaft on non-ABS axles, check this too.Wheel bearings, I know you swapped them but just check they havn't crept as you were driving. Did you fit branded ones? hong-kong fuey ones don't have such a good reputation for longevity.
May sound mad but check your pully. as mine is slighty warped and it shakes the whole car. but you can only see the pully wobble when the engine is running. havent a clue how it got warped and all bolts are tight on it.
Check the diff for backlash too whilst you're under there.
Hang on, it vibrates worse under power? have you got a missfire? perhaps an air leak that only shows up under load, that could do it. Try it in both 5th and 4th just to be sure it's not got anything to do with the engine. I have a vibration on Blue that comes on at 50 ish but only in 5th, when the engine and propshaft speeds are similar. Only came on when I swapped the axles and engine so it's not the 'box, I think it's a little imbalance in both axle and a misfire that I havn't cured yet (valve going I think).that's also why I asked about the backlash, if there is a lot of f4ree play in the diff input shaft or any sideways play at all.Just remind me, you are sure it's not a UJ going aren't you? and have you considered the vibrationmay actualy be at the back end? (comes up through the propshaft and ofetn hard to distinguish between front/rear).
Hang on, it vibrates worse under power? quote]The wierd thing with mine was the vibration starts at 60 (only in 5th), gets really bad to 80, but at 80 it calms (a window of about 3 MPH). If I drop the clutch and stick it in Neutral at 75 when the vibration is near its worst, the vibration stays there. If I get to 75mph and just take my foor off the accelerator, the vibration goes completely.I have noticed that if I drice the thing for more than a few hours, the clutch gets spongey and after a full days driving it will only grind into reverse, however the following day once cooled down, it is back to normal. I think this is a different fault so will put in another thread for this one!
As it turns out my front prop was shot and it was'nt safe to drive (got recovered OK).Just a thought, not sure if this has been mentioned or not, have you checked the bearing on the output shaft from the front dif?
