1997 Jeep Grand Cherokee Laredo is shaking and the wheel jerks?

That would do it since there should be NO water in the transmission...the reason you have transmission fluid...Also, I would say the the mechanic you originally took it to is Highly suspect...Shady Mechanics will screw up your car to bring more business...Take it to a dealership ??? Real mechanic will perform only the work you ask them for...When they solicite other work..they are normally trying to rip you off. Good Luck