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Spicer (Dana) · Brakes & Wheel End
6-68-74
In stock · ships from Knoxville
This is a slip yoke dust cap (also called a plug) for heavy‑duty truck 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.
Freightliner
International
Mack Trucks
Peterbilt
Volvo Trucks
Other applications
Freightliner
International
Mack Trucks
Peterbilt
Volvo Trucks
Other applications
Exact vehicle fitment depends on the specific slip yoke assembly. Cross‑reference the OE numbers below to verify compatibility with your driveshaft.
Part data verified against 1 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 40.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It presses into the open end of a Spicer SPL‑series slip yoke to keep grease in and prevent dirt, water, and debris from contaminating the splines. It is typically replaced when the original cap is lost or damaged, which can lead to premature spline wear and driveline vibration.
Part Number: 6-68-74
DUST CAPS
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
