IF you can here your electric engine but you seater is not mowing that means that you have to change your gear becouse original is plastic and is broken (thats is common problem with this cars) new kit in FORD servisce will cost you about 200 pounds all you have to do is remove your car seater thats only takes you few minutes and few screws and remove small engine open it and old broken gear have to be remove which takes you about 30 min to 2 hours toremove it, clean it (Use grinder, pliers) and fit new golden gear much stronger than plastic. Easy job even kid can do it you do not have to be engeneer or mechanic or specialist to do this job :)
Remember gear and 2x sleeves is better than one big part because they all working separately that why we decide to cat them in 3 peaces because they not destroy your frame