1st of all, the transmission I have on my car is not a single speed, it's a three speed from an Overdrive ST.
Well you said so in the first place
Check this list then-
http://www2.towerhobbies.com/cgi-bin...I=DTXD92**&P=X
EDIT----
Looks like they only have the 1's/2nd gears. Try this list-
http://www2.towerhobbies.com/cgi-bin...p?&C=CLB&V=DTX
Dont pay any mind to the items description, just compare part numbers