ez go dcs shutters and wont move

so I have a 1998 DCS EZGO that has new batteries and a new solenoid. I know its a DCS because it has the F&r lever by your legs and has the tow/maintenance switch on the controller.

I put new batteries in the rig and wired everything up adn the cart worked for about 10 minutes i went up a hill and it barely made it up the hill. Then it just quit working and i had to tow it home. I have a feeling its the controller.

Now it when i put it in gear and press the gas pedal it just shakes and the wills barely moved. I have the rear end jacked up and in both F&R it just shutters and will barely turn the wheels. What is wrong with my cart.


side note........

I also recently purchased a series model ezgo with a rusted out battery box. what parts will i be able to swap to the DCS cart to make it run if any. I know the controllers wont interchange but would the rear end and motor? Tomorrow I am going to put all of the good batteries in the series cart and

i am pretty hand with mechanics but i have never messed with golf carts before. I have the full service manual for both carts also. I prefer to fix it myself vs bringing it to a "CART MECHANIC"

see if it runs.

Thanks in advance