MAHLE Rear Main Engine Crankshaft Seal 01-24 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
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- Ships from MAHLE
Are you replacing a leaking rear main seal? The MAHLE Rear Main Crankshaft Seal is a direct-fit OE-quality replacement designed to seal the rear of the crankshaft where it exits the engine block. This critical seal prevents engine oil from leaking between the engine and transmission, helping maintain proper lubrication and keeping the clutch, flexplate, and bellhousing area clean. Whether you’re performing a transmission service or rebuilding your engine, replacing the rear main seal helps ensure long-term reliability and prevents costly oil leaks in high-mileage or heavy-duty diesel applications.
Manufactured to meet or exceed original equipment specifications, the MAHLE 67777 uses a durable sealing material that withstands high temperatures, crankshaft rotation, and constant engine vibration. Its precision-molded design maintains a tight seal against the crankshaft while minimizing friction and wear. Built for durability and precise fitment.
Are you replacing a leaking rear main seal? The MAHLE Rear Main Crankshaft Seal is a direct-fit OE-quality replacement designed to seal the rear of the crankshaft where it exits the engine block. This critical seal prevents engine oil from leaking between the engine and transmission, helping maintain proper lubrication and keeping the clutch, flexplate, and bellhousing area clean. Whether you’re performing a transmission service or rebuilding your engine, replacing the rear main seal helps ensure long-term reliability and prevents costly oil leaks in high-mileage or heavy-duty diesel applications.
Manufactured to meet or exceed original equipment specifications, the MAHLE 67777 uses a durable sealing material that withstands high temperatures, crankshaft rotation, and constant engine vibration. Its precision-molded design maintains a tight seal against the crankshaft while minimizing friction and wear. Built for durability and precise fitment.
Diesel Power Products directs warranty claims to the respective manufacturer; coverage and duration depend on that manufacturer and product. Its one-year manufacturer-defect warranty applies only to products manufactured by Power Products Unlimited Inc., not all products it sells. Manufacturer inspection is required; DPP does not pay inspection/return shipping or labor.
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Diesel Power Products warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Professional installation is recommended.
- Return eligibility
- Diesel Power Products states a 30-day window from receipt for eligible new, uninstalled, unopened and complete items in original packaging, with prior approval/RMA. Custom tuners and specified opened tools are excluded. Customer pays return shipping; original outbound shipping, including initially free shipping, is deducted. No standard restocking percentage is stated for ordinary approved returns. Based on what Diesel Power Products offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- Diesel Power Products
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Diesel Power Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.