trans on 2006 Kia Amanti

this is my wifes she drive 50miles one to work every day . so the car has 112.000 on it i put an engine in it at 92,000 and now i think the trans is starting to go . you the gas and its like jumps realy hard like it sliping i changed the fluid and put back kia fluid does this in gears .so it may not be trans . could it be something eles

1 answer 1 comment
Is the Check Engine Light on if so retrieve codes stored in the computer of your car that would then indicate where the problem is. It does sound like it is a transmission problem. Kia as a car manufacturer put a lot of great technical information and work shop manuals on line for free for Kia owners. www.kiatechinfo.com
there is no engine