unknown 2:
I just went to the Radioshack website. If you have never seen it----->
LINK-HERE
All the SE's listed there are 3rd Gen. But since you seem a little confused I will list all 9 of them for you-this should provide you some clarity:
-White 2005 Ford GT
Catalog #: 60-7050
-Navy 2005 Ford GT
Catalog #: 60-7051
-2003 Red Chevrolet Corvette C5
Catalog #: 60-7048
-Orange Ford Mustang Mach I
Catalog #: 60-7054
-2003 Yellow Chevrolet Corvette C5
Catalog #: 60-7049
-Green 1967 Ford Shelby GT-500
Catalog #: 60-7070
-Red 1967 Ford Shelby GT-500
Catalog #: 60-7071
-Red Dodge Viper
Catalog #: 60-7052
-Black Dodge Viper
Catalog #: 60-7053
Of these 9 listed--I have the Ford Mustang Mach1 and the green Mustang Shelby. Both of these cars work really well-a huge improvement of their predecessors. No steering glitches or shortage of speed.
My buddy has the black Viper and it works well too.
I hope this helps and FYI: if you look around in these forums a little there's answers to most of your questions.
You should(if you haven't already)post your MT question in the MT forums.