Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Neapco · Drivetrain
4-1090
In stock · ships from Knoxville
This Neapco 4-1090 is a heavy-duty universal joint for Spicer SPL90/SPL100 series driveshafts.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 6 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Hino
Isuzu
Hino
Isuzu
Also fits many medium-duty trucks and equipment with Spicer SPL90/SPL100 driveshafts and outside snap rings. Verify lock-up dimension (4.953 inches) and bearing cap diameter (1.625 inches) before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 3 of 3.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It links driveshaft segments together, transmitting engine torque while allowing suspension movement and angular changes. Replacement is typical when the joint develops wear, excessive play, dry bearings from lack of grease, or driveline vibration. It uses outside snap rings (OSR) and includes a grease fitting in the cross for regular lubrication.
Part Number: 4-1090
SPL100 U-JOINT
Category: Driveline
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more