Hi y'all,
I'm not sure how to get pics on here yet but here's the link:
http://portland4x4.tripod.com/bedrust.html

I realize that this may be pretty deep being that it seems to be surfacing from underneath on the bed supports. I need to start grinding and it'll probably call for more than just simply painting over the exposed metal, so I've got to reinforce this since it carries the load. I was wondering, ya think this could have anything to do with not using those bed supports that PA gives with the 2" bodylift? The bed doesn't have any flex or warp to it, but I can see how this would put more stress on those points. I don't regularly haul heavy loads, just the normal stuff here and there. I think after I fix this perhaps I'll weld those supports in. BTW, there is absolutely no signs of excess stress or rust anywhere else on the bed, just those two sides.

Also, just for grins, anyone heard anything about those new cool looking TRXUS STS All Terrains? I'm curious what interco calls "great street performance and durability" Take care~ Dennis

Those pics look just like my bed mounts, only it's the two in front of the wheel wells that are rusting through on my T. I didn't even notice it until sometime last year, which leads me to believe they are rusting from the inside out. When I noticed the paint cracking I called Toyota to see if thier corrosion coverage would take care of it, but my truck was more than six years old at the time, so no dice (big suprise!!). I tried to tell the woman that the rust had to have started long before the paint cracked, but she wouldn't budge.
Anywoo, not sure how I'm going to deal with it. I've been meaning to grind the rust away and see how bad it's gotten, but it seems like it's been raining forever here.
Anyone else have this???

This has happened to me also <img border="0" title="" alt="[Mad]" src="images/icons/mad.gif" /> Passenger side in front of and behind the wheel well. The mount after the wheel well was by far the worst. I tired to grind it out, but the cancer was to deep. I brought it to a local body shop and they cut out the cancer and glued in a new piece of steel. The rust definately started from underneath, getting between the bed itself and the triangle shaped mount that attched to the sross member. Bad design. I have no rust like that anywhere else, just on the bed mounts. I'll post some pictures if I get a chance.

I have a solution to your problem, although most people think I'm crazy for doing it. Having lived in rust free Colorado I brought back two MINT condition 87 4X4's to NH, the rust capitol of th world. I wanted to keep them from rotting out, so I did a little poking around here and sure enough I found a guy who makes a living doing this here. The answer, oil, and lots of it. It works awsome too.

I spray the undercarrage of my vehicles with oil, also treat the inside of my fenders, doors and tailgate. I have tried several different methods and oil mixtures, and have settled on this for a solution. Here is what I find works best. I go to Walmart and buy in bulk straight weight gear oil, ~25 bucks per 5 gallons. I then super heat the oil up on a camping stove to get it nice and watery. I then dump this into a stainless steel hand pump sprayer for bug poision. Pump it up and spray away. After application I drive the truck down a nice dusty road. I do this about twice a year, applying it when I feel it is needed. I'm telling you this works like a champ. I kept both my 87's rust free for 5 years here and one was a regular driver in the winter salt. I have applied this same thing to my 98 T100 and the thing does not have a spec of rust on the undercarrage, doors or tailgate. Now it is messy and smelly and will drip for about 3 to 4 weeks after application, but it beats dealing with rust. Some may find this to be unfriendly to the great outdoors, but the way I look at it, there are those who do far more damage than my truck dripping a little bit of oil on the roads. Typically it takes about 9 quarts to do a complete job, I used about 15 quarts for the first application. For those that live in a part of the country where rust is a problem this is a sure fire way to beat it.

</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by T0Y0TA 4WD:
<strong>...people think I'm crazy for ... Having lived in rust free Colorado ..., the rust capitol of the world. I wanted to keep ...rotting out, so I did a little poking and sure enough I found a guy who makes a living doing this... The answer, oil, and lots of it. It works awsome too..</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans"><img border="0" title="" alt="[Big Grin]" src="images/icons/grin.gif" />

I think I know why I left Colorado!

Anyway, this is like the old "keep yer gun well oil'd" rule. However, you got to start BEFORE the rust gets to perforation stage.

Will POR15 help stop this. I think I got the same problem underneath, at the body/frame mounting points.

Well, a least a frame can be easy replaced/welded.
NOT. <img border="0" title="" alt="[Razz]" src="images/icons/tongue.gif" />

My 93 has the same problem but much worse. It's the only rust on the truck. The holes are about 1-1/2" round and started from the inside not the surface. Seems to me Toyota screwed up on this one. Bob

Well a couple months ago I put phosporic acid (Ospho) in a bottle sprayer and sprayed in and around those mounts underneath. I also gently poured it into the cracks made by the rust that those pics showed. Careful though, this stuff doesn't always get along with paint.
This kinda takes it one step further than the oil idea. It converts the rust back to metal and also creates a tough primed surface, but it can only do so much if the rust has eaten away at the metal.
It helped a bit, especially inside the mounts and the channel they are welded to, that I obviously cannot get a wire brush at. I sprayed it like crazy all in there. It seems to have stalled the process, which is about all I can do when it's inside those inaccessible areas. It's also pretty good at killing those roaches here in south texas, hehe.
It's also useful for cleaning rust and rust stains off of stuff, you just wipe it off before letting it dry. Like RWD mentioned this is the only speck of rust anywhere on the whole truck body.
Just another idea I remembered, but obviously you couldn't go spraying all over underneath with this stuff.~Dennis