OK with my front wheels aligned, once i get above 30-40mph the car starts to pull to the left but is fine at lower speeds, but doesnt always pull. Ive swapped wheels still no avai. and sometimes when changing lanes with a borderline full load the car will pull one way then the other. could old worn out springs cause this? also how likely is that it could be the inner tie rod ends. my outers are good.

 

I doubt is the inner or outer tie-rods. I would suspect spring seats and/or tires. Check also that the tires have a sufficient Load Index.

 

Tires are good, spring seats and strut mounts are new OEM. everything else in the front end has been replaced except for the springs and tie rod ends.

 

anyone else have and words of advise?

 

Your explanation of the problem: pulls to one side at some speed, noticable above 30-40, and can pull in either direction with a rear load. First I apologize for my ignorance. I believe that directional stability is not primarily based on the springs(coils around strut?) but on the tie rods. When the alignment was done were you told of any problem with them? Do you notice any play when one wheel is jacked up and you attempt to move that wheel, pushing in on the front while pulling out on the back and vice-versa, as though you were trying to move the wheel to steer the car from left to right and back (difficult to explain). As to the speed and load characteristics, I believe that as the car goes faster there may be some lift in the front or downward force on the rear (really don't know for sure without aerodynamic data) and when loaded with more weight in the rear, the car is lighter(then the rear) in the front also. The lightness in the front would create less load on the steering assembly and therefore make any looseness in same easier to create directional instability. Therefore I don't believe it's the springs. One man's opinion.

 

hmm i was told of no issues when the alignment was done

 

This sort of thing is usually a worn part somewhere, often a bushing. If you had alignment problems before all the work and they put the tyres back on the same corners, that can cause an issue too. A tyre will wear unevenly when the suspension is bad, so a tyre rotation front to rear always helps.
A problem with a rear load makes me think camber/caster issues in the front suspension, but it could also be a worn rear control arm bush. What do you call a borderline full load? It may not be a front end issue, it may be an overloading issue.
My next step if I was you, would be to find a good specialist alignment shop and get a FOUR WHEEL alignment done. Tell them of your issue as well.
These shops specialise in finding this sort of thing and don't charge much more for an alignment than a cheapo tyre chain alignment. They also know all the tricks when it comes to older cars and finding issues.

 

Also at speed there is less tire friction therefore making it easier for tires to change direction(remembering days of no power steering). Typhoon's points are valid, any loose part in the suspension that can effect direction will. You probably know that the slope of the road effects direction. Good luck.

 

how easy is it to replace the inner tie rod end?

 

The hardest part is preventing the rack shaft turning whilst undoing the inner tie rod end socket nut.
If you can grab the tie rod and it doesn't rattle when you push it back and forth, it's fine.
I still suspect you might be merely overloading the rear suspension, FWD doesn't like lots of camber or caster changes, the solution might be rear air bags in the coils or similar. We really need to know what sort of load you carry. Got a photo of the car loaded, side on?

 

The inner tie rod was very easy on 850. Actually the hardest part, was separating the inner from the outer tie-rod, especially the right-side.

To separate the inner tie-rod from the rack, just take a plumber's wrench and turn counter-clockwise to unscrew -- that's it. I had no issue with the rack moving..... ITR turned without a fight.

Regardless how good you are with the tape-measure, or counting the threads -- you still need an alignment afterwards...

 

Im pretty sure its my drivers side because with the car off the ground i can wiggle the wheel in an out (side to side) just a little and hear kind of a clicking noise coming from the inner tie rod

 

oh and it only really does it while accelerating or changing lanes while accelerating the car will try to go back and forth, even with just me in the car.