Ive been doing some research on here for a few weeks trying to figure this out. I found a few different threads similar to it but no definitive answer on the fix...
When Im driving usually accelerating around 60 mph the back passenger side feels like it wants to fishtail. Sometimes when im cruising at this speed i get the same reaction. Ive seen some other threads saying it could be suspension.
Help please

 

Check your rear tradition control arms.

 

Thanks for the reply.. thought i was talking to myself. lol
I'll get under there and check that...

 

Look for worn bushings on your control arms /upper & lower. also check toe arm & traction arms. If nothing loose get it aligned. They get touchy feely to the road when out of alignment. Do you have stock or aftermarket suspension?

 

Touchy feely when out of alignment is an understatement haha. I've never driven a car so sensitive to alignment.
Also check the rear subframe bushings. It's a floating subframe so if they are worn it'll cause the rear to kind of steer itself.
Bad tires are very often overlooked as well.

 

get it on an alignment rack. A good alignment guy should be able to point out the issue right away

 

Alignment. Mine was horrid at speed before it.

 

Mine was also, right rear wheel had been curbed in a slide & any time she hit a slippery surface the rear end would kick out to the right & try passing me up. First indication that something might be amiss was the fact that the right tire was worn much more than the rest. Went to get it aligned & found out all adjustment bolts were stuck in the sleeves. So all new protane bushings in the rear, new Supra MKiv bolts, & an alignment check once a year, (Pa roads suck!) keeps her on the road where I put it, rather than where it chooses to be.