644 ID

[mccarlk]

hi from what i am gathering the trans i have is the 644, for my 5a the tag is missing, is there any id inside or anything else i can go by, i dont want to order the wrong ring gear, thanks again guys

[luvrbus]

Mc look on the torque converter housing  (the flange part) there should be numbers or on the back close to were the modulator goes but if you have the stepdown adapter 99% sure it is a 600 series and 643 and 644 are the same flexplate  good luck