I don't remember any problems with the 4006 when they were intoduced. The California Highway Patrol was S&W's first big customer to order them in 1990. They have just recently started replacing them with new manufactured ones, the original CHP guns now being more than 20 years old. I believe that the CHP shoots MONTHLY, so these guns have shot a lot, with very few problems and as they worked so well, CHP is replacing old 4006's with new 4006s.
S&W made several variants of the 4006 / 4013 / etc. series called the ".40 Tactical Smith & Wesson." They have the suffix of "TSW" added to the basic model number, such as "Model 4013TSW" for an example. Most TSW guns had an accessory rail with rivets or some other hardware attached to the frame under the front dust cover. as well as a prominent logo on the slide.
In addition, they also had models made in the Performance Center, several series of guns called the "Shorty Forty" that was a deluxe gun, many having Bar-Sto barrels and spherical bushings, Noval sights, aluminum frames, lightening cuts for style and unique markings and logos.
The Standard Catalog of Smith & Wesson Third Edition is your current bible, with an excellent rundown of what was made. They have an entire section devoted to Performance Center guns, some of which are part of what you are asking about.
The plain Model 4006 is a very solid and reliable gun, I can't offhand recall any recall issues. My department bought and began issuing them in 1991. Both the gun and the cartridge have proven themselves. Deputies and offficers that were issued the M-4006 in my department are carrying them still, 21 years later. I bought one, because I figured it might be the next new big thing. I have never carried it to work, but two fellow officers borrowed it to use in their revolver-to-semiauto transition courses, 3 day affairs in which a deputy or offier would fire 750-1,000 rounds. My gun has about 2,500 problem free rounds shot through it.
I also own a 1983-made Shorty Forty, a Model 4013TSW and a Chiefs Special Model CS .40, all bought new by me but none of which have been fired. My first 4006 is an adjustable sight gun. I bought it in August, 1990. It has a few thousand rounds trough it without bobble. I like it a lot.
My department, the Salt Lake County Sheriffs Office, bought quite a few in 1992 for an issue piece for deputies, court bailiffs, corrections officers and a few others. We have seen no chronic problems of any sort.
By the way, the TSW guns were not made by the Performance Center. The Shorty Forties were.