There is a rising concern about squeaking in ceramic-on-ceramic total hip arthroplasty (THA). In pin-on-disc testing of a delta–delta coupling, we reproduced squeaking and observed microcracks on worn surfaces. We used a pin-on-disc machine and made discs and pins by cutting delta ceramic to a diameter of 40 mm (D–D). Cross-linked polyethylene was used for a comparison disc (D–P). We performed the same test using another D–D coupling specimen to confirm reproducibility. Squeaking in the D–D specimen was reproduced in wet conditions, though it was not found in the D–P specimen. Fast Fourier transform analysis showed a peak frequency for squeaking of 2794 Hz. The noise occurred at about 6.6 km of sliding distance. Scanning electron microscopy revealed that the worn surface of the pin in D–D at 10.8 km of sliding distance had some microcracks. However, there was no obvious damage to the worn surface of the pin in D–P at the same sliding distance. We confirmed the reproducibility of these findings, obtaining similar results, including squeaking, from another D–D coupling specimen. Our findings show that squeaking may occur in THA using delta ceramic bearings even if implants are placed to avoid extra-articular impingement of the femoral neck. Although the clinical relevance of microcracks is unknown, they may affect long-term outcomes in THA using delta ceramic bearings.