Easiest Way To Tell If Its An Overdrive Is To Look For The Upside
Down 3-4 Lever On The Side Case.THE WAY THE OVERDRIVE WORKS,IS,
WHEN YOU SHIFT FROM 2ND TO 3RD,IT ACTUALLY GOES 1 TO 1,OR
WHERE 4TH USED TO BE.THEN WHEN YOU PULL 4TH GEAR INSIDE THE
CAR,THE TRANS SHIFTS TO WHAT USED TO BE 3RD GEAR...