Every planet gear in a URAL differential needs something to spin on — and that something is the cross pin 375-2403060 (Russian: крестовая ось, the differential spider). It is a 1.8 kg piece of hardened steel that looks unremarkable, yet it carries the full drive load whenever torque passes through the differential. This guide covers its role, its remarkable 45-diagram footprint, and what to check when you have the axle open.
What the cross pin does
The 375-2403060 is the shaft on which the planet gears are mounted inside the differential case. The case bolts to the crown wheel and spins; the cross pin spins with it, and the planet gears ride on its journals. When the truck turns, the planet gears roll on the pin's journals — so the pin's surfaces are both a structural member (carrying drive torque) and a bearing surface (carrying the planet gears' rolling contact).
Worn cross-pin journals mean planet-gear play: backlash, driveline clunks, and accelerated wear of the entire gear set. On teardown, scoring or measurable wear on the journals means the pin is done.
Specifications
| Property | Value |
|---|---|
| Part number | 375-2403060 (also written 3752403060) |
| Name | Cross pin (differential spider) / крестовая ось |
| Brand | URAL |
| Group | Rear axle — differential assembly |
| Weight | 1.8 kg |
| Assembly diagrams | Appears on 45 drawings |
Which trucks does it fit?
The final-drive reducers of the middle and rear axles on:
- Ural-375 — differential and axle shaft drawing, position 14, quantity 1
- Ural-4320
- Ural-5557
The 45-diagram footprint is among the largest we have seen in this series — the same cross serves the URAL axle family across decades of catalogue revisions, which keeps it in steady production and easy to source.
The complete differential overhaul picture
This series has now covered the whole differential gear set. Here is how the parts fit together inside the case 375-2403022:
| Part | Number | Role |
|---|---|---|
| Differential case | 375-2403022 | Two-half housing, bolts to crown wheel |
| Cross pin (this part) | 375-2403060 | Journals the planet gears |
| Planet gears | 375-2403057 | Roll on the cross pin |
| Side gears | 375-2403050-20 | Drive the axle shafts |
The catalogue rule stands: gears are replaced as a set. When you open a diff and find journal wear on the cross pin, budget for pin + planet gears + side gears + washers together — the wear never stays on one part.
Before you order
- Match the catalogue number 375-2403060 against your parts book.
- If the old pin shows journal scoring, check the planet-gear bores too — they wear as a pair.
- For fleet orders, count axles: one cross pin per differential, and a 6x6 has three drive axles.
Where to look it up
Full specifications and all 45 assembly diagrams with position numbers are on the part page:
375-2403060 Cross pin — kamaz-parts.com
The catalogue covers 87,000+ KAMAZ, URAL, MAZ, MTZ and TATRA part numbers organized by the original OEM drawing structure (brand → model → assembly group → position table), so you can verify any number against the actual assembly drawing before ordering. Wholesale inquiries go straight from the part page — mixed pallets welcome, export paperwork included.
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