drop links

hi
 
had to change the front coil springs as one had broke every thing went back on nicely but there was  a thud when i drove is this down to the spring,im getting a bit of a nock from the front on a uneven road its not the shocks or the springs thay been checked,im thinking the lower ball joints or drop links or antiroll bar bushes the bushes on the lower arms or good,,,,,any idea on this cheers
the car is a saab ng900 s 2.0 non turbo 1995

Is the car pulling to the side?

befor i did the coil springs i had the tracking done as i getting a bad wobble on the steering wheel and was pulling to the left
then  i did the coil springs the cars not pulling to the sideand theres no steering shake,,,,,,,,

ng 900 2.0 non turbo 1995
first changed front broken spring heard a thud then i was getting a nocking sound from the same side,so changed the drop link still got the nocking sound,,,,,,,,track rod end looks ok,lower ball joint is ok,,,,,,,,,,

any ideas what could be wrong here,,,,,,,
after changing the coil spring would there be a nocking sound if the bottom washer was put on the wrong way ?????

if the spring hasn't seated correctly you'd most likely be getting a noise...

so il have to strip down again and check to see if the spring seated ok,,,,,,,,cheers for that

just a update on this nocking sound well i have sorted it now it was the shock sleeve nut it was undone,