Th400 Th700r4 And 4l60e /4l8e Transmissions Can Be Identified By The Location Or Absence Of The Modulator And By The Shape Of The Transmission Pan The Th400 Has A Modulator Location Is On The Side The Th700r4 & 4l60e Have A Square Pan With 16 Bolts No Modulator 4l80e Pan With 17 Bolts No Modulator Hope That Works For U
