what is this thing

You're talking about your steering box. I have a '91 4Runner with the same problem. It is a very expensive part to replace (over $500 for the part alone, not to mention labor). You're seeing power steering fluid (which for this vehicle is Automatic Transmission Fluid) leaking through the old seals. My advise (as received from my trusty Toyota mechanic) is to keep an eye on the power steering fluid level (check your owner's manual on how to do this - you don't want to overfill!!!). As long a fluid loss is within reason, learn to live with it. No biggie.

Steering box?

Not too tough to seal this, there is a seal kit, BUT if its the steerign shaft seal leaking, forget it! I've done one and wont do it ever again. All other seals are easy to replace.

I'm beginning to think so. I need to take another look at this thing and compare to a link another poster supplied from ebay in this thread. I guess it's not too serious yet as long as I don't see a lot of seepage and watch my fluids? I also guess this is maybe a $750 repair cost if I have dealer do it?? Do you think a reputable outside shop can do this or is this best for toyota to deal with?

Also thanks to EVERYONE for the input so far.

Just in case to those still helping here, yes I have a V6 auto transmission (91 4Runner).

I'm beginning to think its my steering box based on the replies here but I need to look at it again and compare to one poster's ebay link for a steering box for sale.

Thanks ALL for your input here. Really appreciate the help/advice.

Sounds like the steering box. I've alos got a '91 and had mine start puking PS fluid all over the place. I gave a little thought to resealing it myself, but then looked at the job that would entail. In the end, I bought a refurb unit and hauled it to my dealer for replacement. It ran me about $750 for the whole thing including a front wheel alignment.

Bingo!