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Weller Truck Parts · Drivetrain
100557-WEL
In stock · ships from Knoxville
This is a rear differential input pinion seal, commonly used on heavy-duty truck axles.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It seals the pinion shaft where it enters the differential housing, preventing gear oil from leaking out and contaminants from getting in. Over time, the seal can wear, harden, or become damaged, leading to leaks that can cause gear failure, so replacement is recommended when leakage is spotted.
Part Number: 100557-WEL
REAR INPUT SEAL
Vendor: Weller Truck Parts
Dealer: KP Services Crossville
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