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Merchant Automotive 10603 261XHD Transfer Case
PART#
10603 | SKU ME10603
★★★★★
Vehicle Fitment For:
2001-2007 GM 6.6L Duramax LB7/LLY/LBZ (With Floor-Shift Operation)
See full application list below
$2,249.95
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Description
Don't let pump-rub issues take down your 2001-2007 GM 6.6L Duramax LB7/LLY/LBZ, upgrade to a Merchant Automotive 10603 261XHD Transfer Case. Merchant Automotive addresses the common issues in the factory floor-shift transfer case, making their 261XHD a more durable and reliable choice when looking to upgrade or replace your already damaged unit.
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 transfercase to reduce wear, increase shifting performance, increase component efficiency, and increase driveline performance by reducing clutch chatter.
Features:
- NEW 261XHD Transfer Case
- 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
- Brand New - No Core Charge
- 2 Year / Unlimited Mileage Warranty
Note:
For trucks with Floor-Shift transfer case operation. If your truck has a Push-Button transfer case operation, see Merchant Automotive 263XHD Transfer Case (Part # 10604).
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.
Manufacturer Warranty*:
2 Year / Unlimited Mile
2 Year / Unlimited Mile
Instructions & Tech Info
Installation Info
Reviews For Merchant Automotive 10603
Overall Rating
/5
2 Reviews
Rating Snapshot
2
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Verified Buyer
Merchant Auto Transfer Case for 03' Silverado
David (Front Royal VA) | August 23rd, 2025
The transfer case seems solid. Shipping was fast and there is an incentive to return the core to get a gift card for future needs. All good.
Verified Buyer
Merchant Auto Transfer Case
Shawn (Kenosha, WI) | October 7th, 2021
Fast shipping! Of all the parts I’ve ordered for my truck, the lead time and shipping on this part was the quickest. It’s being installed now, I’ll update my review down the road.
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Specifications For Merchant Automotive 10603
MPN
10603
SKU
ME10603
ID
35460
Manufacturer Name
Merchant Automotive
Shipping Weight
89.00 lb.
Shipping Length
12 in.
Shipping Width
20 in.
Shipping Height
12 in.
Fuel Type
Diesel
Manufacturer Warranty*
2 Year / Unlimited Mile
Prop 65
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Internal
L2R2
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Product prices marked with an * may require additonal fees, such as a core charge, which will be displayed in the cart.