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- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Merchant Automotive 10604 263XHD Transfer CaseThe Merchant Automotive 10604 263XHD Transfer Case is an upgraded replacement for your 2001 2007 GM 6. 6L Duramax LB7 LLY LBZ with push button transfer case operation. Built for increased durability, and reliability, Merchant Automotive has addressed common failure items in the factory case. Merchant Transfer Case Pump Upgrade The GM transfer case use a gear pump inside the case that is driven off the mainshaft. This pump forces oil to the planetary
The Merchant Automotive 10604 263XHD Transfer Case is an upgraded replacement for your 2001-2007 GM 6.6L Duramax LB7/LLY/LBZ with push-button transfer case operation. Built for increased durability, and reliability, Merchant Automotive has addressed common failure items in the factory case.
Merchant Transfer Case Pump Upgrade
The GM transfer case use a gear pump inside the case that is driven off the mainshaft. This pump forces oil to the planetary as well as the drive sprocket sleeve. The 5 tabs around the housing fit into the spots in the rear housing are what positions the pump. Over time, the pump can start to wear on the rear housing. This is commonly referred to as pump rub. Each transfer case includes the Merchant Automotive Pump Upgrade to alleviate these "Pump Rub" issues.
Magnetic Drain Plug
Help extend fluid life, and the life of your transfer case with the Merchant Automotive magnetic drain plug. The drain plug catches debris instead of circulating it through the case. Also included is a fill plug made of high strength corrosion resistant stainless steel.
Merchant Automotive Transfer Case Oil
The included Merchant Transfer Case Oil is specially formulated for your GM transfer case to reduce wear, increase shifting performance, increase component efficiency, and increase driveline performance by reducing clutch chatter.
Features:
- NEW 263XHD Transfer Case
- Brand New - No Core Charge
- Upgraded For Durability & Reliability
- Includes Transfer Case Pump Rub Fix
- Ships With Merchant Transfer Case Oil
- Includes 2-Quart Bottle Of Transfer Case Oil
- Magnetic Drain Plug - Captures Small Debris
- 2 Year / Unlimited Mileage Warranty
Note:
This is for trucks with Push-Button transfer case operation. If you have a manual lever on the floor, see Merchant Automotive 261XHD Transfer Case (Part # 10603).
Encoder motor is not included.
Transfer Case will be shipped with a 2 Quart (64 fluid oz.) bottle. The transfer case WILL NOT BE FILLED WHEN RECEIVED. One Transfer Case will use 64 fluid oz. You MUST fill the transfer case before operating the vehicle or severe damage to the new transfer case will result.
WARRANTY INFO:
2 Year / Unlimited Mile
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
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Product Reviews
★★★★★ 5
Great no show socks
Size: Small, Color: (725) Oxford Brown / Oxford Brown / Black
Very comfortable and perfect fit for my small feet. I love the full coverage sock feel with a totally no show sock.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great no shows for people with larger feet
Size: Large, Color: (001) Black / Black / Castlerock
Some of my favorite socks!! Great quality, fit, and material. I love that they don't slip down in my shoes, especially considering I have larger feet. I also love that Under Armour offers larger sizes in their socks considering everyone in our household has much larger feet than others.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Best liner socks EVER
Size: Medium, Color: (348) Silica Green / Silica Green / Hydro Green
I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Great socks
Size: Medium, Color: Pink - 647
Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed.
I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood).
Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025