UDS Series 1000 ISR

Part No. 5-103XU Universal Joint 1000 Series, ISR 1-0103, 1-0170 PTO App 20 X 38, 0.938 X 1.500

$12.37

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Specifications 5-103XU · 1000 Series U-Joint

How to measurePoint at a letter to read its measurement

Part number: 5-103XU
Part type: U-Joint
Condition: New
Brand: UDS
Series: 1000
Style: ISR
Lube: Yes
Cap diameter: 938
Width: 1.500
Weight: 1 lb

Fitment

Lube fitting in body, Mostly used on a steering shaft

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About 5-103XU

Fitment accuracy and torque capacity define the 5-103XU UDS universal joint. Rated for Series 1000 service, it ships with 938"-diameter bearing cups, a grease fitting for field maintenance, and the ISR snap-ring retention geometry that correctly mates with Series 1000 yoke bores. Cross dimensions conform to UDS published standards for direct interchange.

Technical Specifications -- 5-103XU

Specification	Value
Part Number	5-103XU
Brand	UDS
Series	1000
Cap Diameter (End 1)	938"
Width / Span (End 1)	1.500"
Lubrication	Greaseable
Retention Style	ISR
Notes / Cross-Reference	Lube fitting in body

Series Identification & Cross-Reference

The 5-103XU is dimensionally compatible with all standard Series 1000 yokes featuring 938"-diameter bore and the ISR snap-ring groove pattern. Confirm that both the transmission-side and axle-side yokes specify Series 1000 to ensure correct bearing cup engagement depth and adequate retaining ring seating.

Lube Type & Service Interval

The 5-103XU includes a grease fitting (Zerk) at the center cross, allowing lubrication with standard NLGI #2 moly or lithium-complex grease. Purge old grease at each fitting until fresh grease appears at all four bearing caps. For on-highway applications, re-grease intervals of 5,000 miles or 3 months are typical; off-road and severe-duty applications warrant shorter intervals. Avoid over-pressurizing the fitting to prevent seal extrusion.

Installation Guidance

Factory application note for 5-103XU: Lube fitting in body. Verify this cross-reference against the vehicle or equipment build sheet when substituting for an OEM part number. When replacing a worn joint, inspect the yoke ears for wear, the snap-ring grooves for deformation, and the bearing bore for out-of-round condition before installing the new assembly.

Torque all u-bolt or strap bolts to specification after installation
Balance the driveshaft assembly if replacing the joint on a high-speed shaft
Use a press or dedicated cross-kit installation tool to prevent bearing cup misalignment
Do not strike the cross with a hammer once bearing cups are seated

Why Source 5-103XU from Universal Driveshafts?

Universal Driveshafts stocks a comprehensive range of Spicer and UDS cross kits to minimize downtime for fleet operators, OEM rebuilders, and off-road enthusiasts. The 5-103XU ships from inventory with no minimum-order requirements. Each joint is packaged to protect bearing cup surfaces and snap rings during transit. Our technical team can assist with cross-referencing legacy part numbers and identifying the correct series upgrade when upgrading to a heavier-duty joint family.

New to U-joints? See our universal joint guide for styles, snap-ring types, and measuring tips.