I have a 2005 Dodge Magnum 2.7L, noticed it started getting a shutter and pink milkshake fluid so got a new transmission and air condenser. Drove it; shutter still there but not as bad. Returned the transmission and put in another one. I have the same issue with a shutter while driving. I can't believe my luck would be that bad I get two messed up trannsmissions. Since the transmission is electric, could there be a problem in the electrical/wiring going to the transmission?

Yes, didn't want to take any chances.