[Christ]

Civic/CRX axles - The HF and STD versions share the same hub size and spline count outboard, while auto trans have a smaller inboard stub.

The axle is physically the same size/length, iirc. Just the cv ends that are different. I also believe one can swap ends, but could be mistaken there.

The EG 92-95 USDM axles will fit EF/ED 88-91 "basic" models, although the newer models are a different p/n, and physically look different.

We found from Wonderboy's experience that HF/STD hubs share a spline count with Geo Metro axles. The Geo axles are a bit long, and require washers. The inners are not the same count as any D-series trans.