Rear suspension TSB

This is probably a dumb question, but how can I tell if my truck has the rear suspension TSB done to it? I bought the truck used and have no idea if the PO had it done or not.
Looking at it, it only has two leave and a overload on each side. I'm not sure if the TSB has an extra leaf or something you can tell visually? Thanks.

 

Its not done. It would have a total of 4 if it did.

 

4 leaf packs = tsb 3 = non-tsb


... swilky beat me 2 it..lol

 

Great, thanks guys!
I'm assuming the dealers won't do the TSB on an out-of-warantee truck?

 

I'm bored waiting on them to finish mine up now.

 

I've only been a taco owner for a little over a year (love it, would only trade it for another) but today is the first I've heard of the TSB. Can anyone spare any more details. Is it a factory defect or something.

 

Here is a list of all the TSBs for our trucks --> http://www.tacomaworld.com/forum/2nd-gen-tacomas/7107-tsb-list-2005-2009-toyota-tacoma.html
Basically, the rear suspension TSB is to correct for rear springs that aren't stiff enough and may give a harsh ride when the bed of the truck is loaded. They replace the rear leaf springs.

 

My friend got his done out of warranty. Here's a thread about it.

http://www.tacomaworld.com/forum/2nd-gen-tacomas/84102-damn-toyota-brown-nosin.html