Spicer – 5-1310-1X Universal Joint

The 1310 series is the most common u-joint cross on the road. Half-ton trucks, older SUVs, rear driveshafts on countless domestic platforms — 1.062"/1.063" cap, 3.219" width. That's what the 5-1310-1X is built around.

What separates this from the sealed variant is the grease fitting placement. On the 5-1310-1X, the zerk sits in the bearing cap itself — a Spicer design choice that makes field lubrication easier without removing the driveshaft. For trucks that see regular maintenance schedules, it extends joint life when greased every 30-50k miles.

OSR retention fits the most common factory yoke configuration. External groove, no circlip inside the bore — direct swap. Pull the caps, knock in the new joint, snap in the rings. Standard 1310 swap.

Spicer parts are forged, not cast. The difference shows up in high-torque applications — trailer towing, payload hauling — where cast joints can crack under cyclic stress.

Key Features

• Grease fitting in bearing cap — accessible without driveshaft removal on most setups
• Spicer forged construction — handles sustained torque better than aftermarket cast alternatives
• 1310 series: 1.063" cap diameter, 3.219" width — fits the widest range of domestic truck yokes
• OSR snap ring retention — most common factory yoke style, no modification needed
• Recommended for vehicles with regular service intervals and higher duty cycles

Specifications

• SKU: 5-1310-1X | Brand: Spicer | Series: 1310 | Cap: 1.063" | Width: 3.219" | Snap Ring: OSR | Greasable: Yes — cap-mounted zerk

FAQ

5-1310-1X vs 5-1310X? Same dimensions. 5-1310-1X is greasable with cap zerk. 5-1310X is sealed. Greasable outlasts sealed only when actually serviced.

Where is the grease fitting? In the bearing cap — accessible on most applications without dropping the driveshaft.

Fits F-150 / Silverado / Ram? If your truck runs 1310-series (1.063" cap bore), yes. Most domestic half-ton trucks 1990s-2010s use 1310. Verify with calipers on your existing joint.