My question now Is can I use orings as grip or do I have to order something special

Well have figured out what all is wrong with my loco's. The f9 needs new drive wheels it does have rubber grips that are worn out just don't have anyone in Ms I know of that works on them. The lifelike has a broken gear so it's out of commission. Guess I will be buying a new loco soon. If anyone has any suggestions on where to get it worked on please let me know. Thanks for everyone's help.

But to answer the question on the age. I called Bachmann this morning and they said they stopped making that loco 5 or 6 years ago

The Bachmann loco has smooth metal  but the other looks like it has a o ring around the wheel. I have been trouble shooting today and it looks like when it is working right and you put cars on it it just spins on the track. I'm taking the whole thing to my local hobby town tomorrow they are thinking that whit the losing power is due to the transformer 

Not sure what scale I have but the loco's are as followed. One is a emd f9 diesel made by Bachmann. The other one is Santa Fe made by life like. They both have light and when we run the loco alone it moves around the track which I have cleaned with steel wool then it start to slow down until it comes to a complete stop but you can still hear the motors running  kinda sounds like the trucks have stripped. Also if you put a car or two behind the loco it does the same we have the power supply at full throttle but its hardly moving and you can hear it loud. I'm thinking the drive wheels are stripping out.

My son received a Bachmann train set a few years ago from my parents. We have just moved the set to our house and now it will not operate correctly. We can get it to move a little but then it stops  but if you carefully lift the engine up a little of the track on one end the drive wheels will start but as soon as you set it back on the track it doesn't work. Any suggestions