Harley updated the axle profile and material in 2020, requiring higher torque for a tighter tolerance.
: A 36mm socket is standard for most modern Harley-Davidson rear axle nuts. harley-softail-rear-axle-torque-specs
For most Harley-Davidson Softail models, the rear axle torque specification generally falls between . However, newer Softail models (2020 and later) often utilize an updated specification of 135–145 ft-lbs (183–197 Nm) due to changes in axle material and design. Harley-Davidson Softail Rear Axle Torque Report Harley updated the axle profile and material in