I've replaced my shocks and springs. Track rod has been replaced 5 years ago. And I still drift in the lane, especially when driving at higher speeds, Checked all wheels for side to side movement. Nothing. Tight as a frogs ***. What would be the cause of such erratic behavior? Its sometimes a struggle to stay in one lane, but not enough to be considered dangerous. What should I look for?? 2002 Discovery 2.

 

caster rod bushings(especially rears at frame). Loose steering. Watts linkage/bushings (5 of them). anything that holds the frame to the axles.....

then ball joints, wheels bearings....tie rod ends...etc...

your disco in any accidents?

wheel alignment recently?

 

Tie rods replaced 5 years ago. Shocks and springs last month. Front wheels are solid on axle. No side to side play. Or up and down. Watts linkage was on my mind. But where in steering would I find loose connection?

 

Lift? If so, you might need castor correction arms. Night and day difference. Doesn't effect all trucks, but when it does it's very noticeable.

 

Before all the modern jigs came in they use to do a thing called a "Drop test" this is simply putting your car on a flat surface the using a pointed plumb bob, mark out the chassis points and axle point marking the points on the floor, move the car then measure the reference points to see if there is an significant deformation, then pin your steering on the drop bar, by inserting a drill to centre the steering












the simply tie a long length of string on the rear I use my tow bar, pull it tight across the rear wheel at the centre of the hub forward to the front wheel centre of the hub, this will tell you if your front wheels are not in line, toed in , toed out, but they should be the same,



It should be

Toe out – Front – 0° 10' ± 0° 10' (total)

! Toe in – Rear + 0° 5' ± 0° 15' (total)


Basically the front are parallel, so if you need to adjust the steering you start with the drag link side , centre the steering with the drill, adjust the drag link side wheel, when you happy with that the do the other wheel on the tie bar if you done have grease plates under the wheels

 

check your tire pressure.

on my P38 i had to raise the pressure a little higher than what the door card indicated. this eliminated the the lane wander issue.