Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
For Your Every Summer RSVP, with Code: SUMMER15
Description
Merchant Automotive 25910 Rear Transfer Case Housing & Output SealThe Merchant Automotive 25910 Rear Transfer Case Housing & Output Seal will replace the cracked rear housing in your 2001 2007 GM 6. 6L Duramax LB7 LLY LBZ. This Merchant Auto NP261XHD NP263XHD Transfer Case Housing is ideal if you need to replace the rear section of the transfer case on your GM Duramax diesel. This rear transfer case half is made of magnesium, which is superior to low cost aluminum knockoffs, under OEM specifications. To avoid and
The Merchant Automotive 25910 Rear Transfer Case Housing & Output Seal will replace the cracked rear housing in your 2001-2007 GM 6.6L Duramax LB7/LLY/LBZ. This Merchant Auto NP261XHD/NP263XHD Transfer Case Housing is ideal if you need to replace the rear section of the transfer case on your GM Duramax diesel. This rear transfer case half is made of magnesium, which is superior to low-cost aluminum knockoffs, under OEM specifications. To avoid and fix cases that have been damaged by pump rub, this kit is a direct replacement and improvement over your factory housing. A driven sprocket support bearing and slip yoke bushing are already installed in this new NP261XHD/NP263XHD Transfer Case Housing.To completely update your transfer case, Merchant also offers a rear output seal and advises adding the Merchant Automotive Magnetic Drain Plug Kit. To make installation easier, you ca pick up the Merchant Automotive Performance Transfer Case Fluid. You will need two gallons to refill your transfer case. Ensure your new case is thoroughly protected, this fluid is designed specifically for heavy-duty transfer cases. The A13 Rear Output Seal, Magnetic Drain Plug Kit, and Performance Transfer Case Oil are available in the Related Items section below.
Features
- No Core Charge
- Cast To OEM Specs
- Direct-Fit Replacement
- Cast In Magnesium Alloy
- Includes Warranty Against Pump Rub
- Slip Yoke Pushing & Driven Sprocket Support Bearing Included
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1834 reviews
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Product Reviews
★★★★★ 5
My favorite
Size: Medium, Color: Opal Blue/White/Cruise Blue (3-pairs)
My favorite socks, too bad under armour discontinued the cotton blend fabric and went to 100% polyester 😠
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 5
Comfortable
Size: 6-10, Color: Halo Gray/Assorted
These are my favorite socks!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
★★★★★ 5
Great fit
Size: Medium, Color: White
Perfect fit and they don't slide off the back of your ankle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 5
Best socks!
Size: Medium, Color: Blue
I love these socks! They last for years and they fit so nicely on my feet. I love that I can wear the in tennis shoes or wool boots and they never move!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2025
★★★★★ 1
TOO SMALL
Size: Medium, Color: Blue
Nice socks, but they are way too small. Says they fit size 6 - 10. I kept 3 ( I wear size 8) and gave 3 to my daughter (size 8.5). We both agreed that they were just too small.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
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