The 8653702 is the GM part number. The code is for a (D) 30 spline 700 converter. (E) is for a 1639 stall rating. (G) is not even shown in my literature. If it is a (C) then that is for 330 ft/lb with 28 degrees of travel. (F) is for converter lugs of 3 and they are of the 245mm style. Sounds like a later model converter with a woven carbon fiber clutch. Used in PWM transmissions. Maybe Chris or Bruce can give a little better read on the (G) code.