I see you have the E brake cable anchors removed ,
I would suggest to also remove the cable housing clamp for the cable on the right side of the cross member this will let it drop out of the way,
Then be careful so you dont damage the tank.
PLEASE NOTE just behind the tank is another round barrel wire plugged into the trans,
pull this wire out to the rear of the car so it wont get crunched.

Then with the two trans mounting bolts removed carefully use a prybar to lever the bottom side of the differential on the rear side of the cross member, it should slide easily.

NOTE put a small piece of 2X4 under the front chassis stiffener to support the front of the TT this will hold in a good spot

 

Thanks Stan.