DUST CAP KIT D3G

DUST CAP KIT D3G 1350/1410 Series Splined Dust Cap Kit

The DUST CAP KIT D3G is a splined dust cap kit rated for both 1350 and 1410 series driveshaft slip assemblies. It seals the spline bore entry on slip yokes and stub shafts against road contamination and moisture intrusion. The inside diameter is 1.779" (R-profile) and the dual-lip seal OD measures 1.766" outer / 1.375" inner. The 16-spline engagement count applies to both series fitments covered by this kit.

The D3G differs from the D3K by its seal OD specification: where the D3K uses a 1.750/1.500 stepped seal face, the D3G uses a 1.766/1.375 profile. This wider spread between the two seal diameters provides a longer lip contact path on the housing register, which is why the D3G covers two series — the 1350 and 1410 assemblies share a common housing register in certain application families. The 1.779-R inside diameter designates a ribbed bore contoured to fit over the spline crests; attempting to fit this cap over a smooth-bore journal or a spline with a different count will result in an incomplete seal or a cap that will not seat at full depth. Confirm the housing bore can accommodate the 1.766" outer seal lip before installation.

Specifications

• Part Number: DUST CAP KIT D3G
• Series: 1350 / 1410
• Type: Splined
• Inside Diameter: 1.779-R
• Seal OD: 1.766 / 1.375
• Spline Count: 16

Fitment & Installation Notes

Before ordering the DUST CAP KIT D3G, confirm the spline count on your slip yoke or stub shaft is 16. Cross-check the housing bore register against the 1.766" outer lip diameter — this is a tighter outer diameter than some generic caps and the housing bore must be clean and within specification to achieve a proper seal. The dual-series compatibility (1350 and 1410) means verify which series your driveshaft runs before assuming interchangeability in all dimensions.

Both 1350 and 1410 series applications are found in 3/4-ton to 1-ton truck and SUV platforms. The 1350 series handles light-to-medium duty cycles; the 1410 series steps up torque capacity for full-size HD applications. A properly seated dust cap on either series is the primary barrier preventing spline corrosion — corroded splines lock the slip joint and transfer shock loads directly to the U-joint and yoke rather than allowing the shaft to telescope under suspension cycling. Repack the spline bore with chassis grease before fitting the DUST CAP KIT D3G to ensure long service life.

Check the existing cap for cracking or lip separation at each driveshaft service interval. UV degradation and heat cycling cause rubber seal lips to harden and lose contact pressure over time. Explore related Slip Yoke components including 1350 and 1410 series slip yokes that use this dust cap configuration.