I hear the TRD package only started with the 2000 models. What was it called before? SR5s? Also, what does the package include? I thought they had like a racing suspension but my toyota dealer tells me it's only 4 special shocks and a automatic locking rear differential. So If I buy a used one and the guy replaced the shocks with regular shocks, it's a stock truck asides of the diff? I thought there was more to it for the price tag.