GE DBL333EAOWW dryer (by 3 users)

I have a dryer that has begun making a LOUD screaling noise when it is turned on. It seems to get better - and even goes away - when it heats up. Also it is better if the dryer is tipped forward.
I took the top off of the dryer and ran it but it did not even squesk. I put it back together and the squeal returned.
All the above led me to believe that there were bad bearings at the rear of the drum. I squirted some non-flammable LIquid Wrench lubricant through the back of the dryer where it looked like the drum was attached. That stopped the squeal but unfortunately some of my clothes have some scent from the lubricant and I think this is only a temporary fix.
If it is indeed a bearing problem, is there a awy to take the old ones off the rear of the drum and replace them with new ones?