Help ... grinding chain only in small chain ring
I've had some work done on my 2013 Kona Honky Tonk: new rear wheel, chain, cassette, rear derailleur, front wheel cones and bottom bracket. The bike is riding like new in the big ring ... chain grind in 34 ring. The gears change sweetly and there is no chain rub. If I pedal really smoothly and slowly on a slight decline or flat the grind disappears ... the moment there's some pressure on the pedals the grind starts and immediately disappears if I change into the big ring. Advice appreciated.