Bigger tires,now steering feels funny....
 

Let me start by saying i read the whole thing about caster and what not,but what i cannot understand is that all i did was swap my stock 17"moabs with 255/75/17....with 17x9 black addicts/295/70/17 nittos trailers.
I understand i went up on diameter and they are 2 inches wider.....does the toe need to be adjusted any thoughts would be appreciated.
:dontknow2:

You need to tell us more, what's funny? With a wider or taller tire handling characteristics will change for sure.

shifting lanes at highway speeds feels touchy (squirrelly),like i have to hold on to the wheel afraid im going to oversteer..

Wider tires can have a floaty feeling at highway speeds. If you didnt lift, i would start with tire pressure check and a balance check

Grab a tape measure and search project JK for the do it yourself alignment. I had a toe out condition and fixed the flighty feeling with an alignment

I would check your toe, and tire psi. I run my 35's at 25 psi, and have played with it a lot and this is best for me.

I didnt lift yet,but i have a TF 2.5 coil kit coming and i also bought the adjustable front lowers to dial the caster back to normal...

wow 25....mine have 32 psi...could that be it...

Probably air pressure if all you did was change tire size. I have had cars go like this and started changing idler arms, drag links, center links...ETC and all the while it was tire pressure. Just go down a couple lbs at a time. You would be surprised what a difference it makes sometimes.
Let us know how you make out?

I will do it tomorow and keep you posted...Thank you