Guy's, I seem to have inherited a steering issue since my recent gearbox swap. Basically what is happening, is that when I turn say a 90 deg left, there is stiff spot in the steering & I get a slight vibration through the steering wheel, as I keep turing the wheel & the corner, it goes away, until I start to bring the front wheels straight again. Its like its hitting / rubbing / catching on something, but its not.

It only does it when the car is moving & turning left. It only happens say after 3/4 to 1 full rotation of the steering wheel & does not do it before or after that point.

It does not do it when the car is stationary. It does not do it when turning right.

I am wondering if it could be alignment issue, but I doubt it as I did not remove anything that would affect the alignment.

So im thinking it could be

Front diff in the new box binding up at a certain point?
CV related in the drive shaft?
Steering rack?

Has anyone else ever had an experience like this? I dont think I have touched anything that could have made this happen since the gearbox swap. Its just weird how it is only doing it turning in one direction & not the other

__________________
Cheers,

Simon.

Jack it up & see if its ok turning lock to lock with the weight off the wheels.
Check the front strut tops ( bearings )
Oil in the power steering pump, its is noisy ?

Oil in the pump & not noisy at all
Turns fine both standing still & with the front jacked up.

__________________
Cheers,

Simon.

did you use the 6MT mounts, support frame / cross members?

Problem solved. Ended up being the engine mounts.

__________________
Cheers,

Simon.

lifting the motor & touching the dump pipe on the steering knuckle ?

Sure was. As I do limited driving in the car, there were no real evidence marks on the dump pipe / steering knuckle bolt though.

__________________
Cheers,

Simon.

Iv got factory motor & box, and if i push v.hard into a sharp bend, the steering will hit a point and go stiff as fuck, (obviously not good when going hard fast down a windy road!)
I have kind of thought it as being maybe a lightly bend/twisted/warped component somewhere, but there is nothing obvious, or somehow the steering pump just starving a little due to the hard G's, maybe due to the wear (180+kms)
It started when I put semi's on last year, but maybe that was just because they gave me the confidence to go as hard.
My ku36's are 235/45/17 and the rear will rub a little with people in the back+hard corner. (have sti pinks)

Lol not trying to hijack, just my 2c.

__________________
my05 STi
my13 Rok

:)