Dana Spicer 130522 Differential Side Gear
The Dana Spicer 130522 Differential Side Gear is a genuine differential component designed for use in Dana Spicer S110-series drive axles. Installed inside the wheel differential, the side gear transfers torque from the differential assembly to the axle shaft while allowing the left and right wheels to rotate at different speeds during turns. Dana specifies the 130522 with 18 gear teeth and a 34-spline internal connection for the mating axle shaft.
Built for medium- and heavy-duty commercial vehicle applications, the 130522 is used in several S110, S110F/FR and related S111 configurations. Dana service information identifies it as the earlier side gear used with pinion mate 133761 in certain S110-family differentials.
Key specifications:
- Manufacturer: Dana / Spicer
- Part Number: 130522
- Product Type: Differential Side Gear
- Axle Series: S110
- Spline Count: 34
- Number of Teeth: 18
- Hub Diameter: 2.752 in.
- Casting Number: 130521
- Gross Weight: approximately 4.1 lb
- Country of Origin: USA
- VMRS: 022-003-048
The 130522 side gear was used across multiple S110 carrier ratios; Dana carrier listings, for example, identify it in S110 assemblies with ratios including 3.73, 4.88, 5.13 and 5.38. This means the side gear itself is not restricted to a single differential ratio, although exact axle and differential configuration must still be verified before installation.
Important supersession note: Dana currently lists 130522 as obsolete/discontinued and directs customers to bulletin HAXL-PNI-117 before ordering. That bulletin identifies Dana 10021092 as the newer side gear for applicable S110F/FR and S111/R/FR configurations, paired with pinion mate 10014706; Dana also lists service kit 505226, containing two 10021092 side gears and four 10014706 pinion mates. Compatibility should therefore be checked against the axle model, build configuration and existing mating gears rather than assuming 10021092 is a one-for-one replacement in every older assembly.
The Dana 130522 is an important internal differential component for maintaining proper torque transfer, axle-shaft engagement and differential operation in compatible Spicer S110-family axles. For older units still using the original gear design, matching the side gears and pinion mate gears as a compatible set is particularly important when servicing or rebuilding the differential.
