just got it and was wondering being this is an automatic transmission with no way to shift this when you get on the throttle and get the rpms up should this shift so the engine isnt screaming . i took it down the road and it was screaming it seemed to me that it should shift

 

I have the same one for my 5yo son, they are a single speed transmission no other gears so it will scream and rattle at higher speeds.

Chris

 

was wondering if you had any electrical problems ? this is brand new and it doesnt last 20 min. it stalls and wont start so i have had to take it back twice and they still havent got it right

 

No electrical problems but the problem I have is the fuel line gets pinched and soesnt allow enough fuel to flow from the tank to the carb with the same symptoms you have.
Chris

 

this is my understanding of the transmission, i have a sunl 90 mini. fully auto means that it is one gear only,and it will scream i only have it adjusted so it will only go 3/4 throttle. a fully auto cvt tranny has gears that change automaticaly. hope i could help and if im wrong please someone correct me.

 

and there is a semi auto that you have to change gears but with no clutch.