Abstract: A splined joint between a shaft and a muff, for the purpose of preventing "dog legging", has a chamber provided at the end of the muff from which the shaft projects and a guide ring received in such chamber, the guide ring exerting constraint upon relative radial movement between the shaft and muff. The required clearance between shaft and guide ring may be obtained by providing projections within the chamber and shearing material from projections on the guide ring by rotating the guide ring relative to the muff.