Originally Posted by
Yoyo2012
I am facing the same problem, and when the chain is on the larger Chainring, it feels stiffer (grinding feel) when back pedalling. BB, freewheel is in good working condition. I am guessing if this problem could be related to chain length, because as I slightly push the rear derailleur to ease the tension of the RD spring (at the same time, the tension of the chain is eased), then no stiff and difficult when back peddling.
The portion of your post that I put in bold above is an opinion that does not give us good information. What is needed is your observation of what happens when you follow FD's suggestion in post 4. The test you did does not isolate the problem (if there is one) as any reduction in tension on the chain will make it run easier.