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Description
Merchant Automotive 10381 Transfer Case Upgrade with Drain PlugsThe Merchant Automotive 10381 Transfer Case Upgrade with Drain Plugs for your 01 07 GM 6. 6L Duramax is the best upgrade you can make to your GM transfer case (model 136, 146, 246, 261, 261HD, 263HD, 263XHD, 261XHD) to prevent the ever increasing problem of pump rub. What is pump rub? The GM transfer cases use a gear pump inside the case that is driven off the mainshaft. The pump forces oil to the planetary as well as the drive sprocket sleeve.
The Merchant Automotive 10381 Transfer Case Upgrade with Drain Plugs for your 01-07 GM 6.6L Duramax is the best upgrade you can make to your GM transfer case (model 136, 146, 246, 261, 261HD, 263HD, 263XHD, 261XHD) to prevent the ever increasing problem of pump rub.What is pump rub?
The GM transfer cases use a gear pump inside the case that is driven off the mainshaft. The pump forces oil to the planetary as well as the drive sprocket sleeve. Because the pump is driven by the shaft, the housing of the pump must 'float' in the rear housing. There are 5 tabs around the housing that fit into spots in the rear housing to position the pump. Over time, the pump can start to wear on the rear housing. GM installed a spring steel clip in the housing intended to prevent wear but the clip can break and render useless
Being that the pump housing is aluminum and is a harder material then the magnesium rear housing, it can wear a hole in the rear housing and cause a very small leak. This leak is high enough in the case that it typically will not leak when vehicle is not moving and therefore not leaving any drops on the ground. Typically the condition is not found until there is transfer case damage from running the case out of fluid.With installation of this kit, you will have a LIMITED LIFETIME WARRANTY against pump rub.
Included Components:
- Merchant Automotive billet transfer case pump housing
- Transfer case adapter gasket at trans
- RTV Silicone
- Blue Threadlock
- Magnetic Drain Plugs
- Merchant Automotive sticker
|
Application Guide |
||
|
Year |
Model |
Transfer Case Model Number |
|
1998-2007 |
GM Silverado/Sierra - 1500, 1500HD, 2500, 2500HD, 3500 |
NP246, NP261HD, NP263HD, NP261XHD, NP263XHD |
|
1998-2003 |
Blazer / Jimmy |
NP236 |
|
1999-2005 |
Astro/Safari |
NP136 |
|
1999-2007 |
Escalade |
NP246, NP149 |
|
2002-2007 |
Avalanche 1500/2500 |
NP246, NP261, NP263, NP263HD |
|
1998-2007 |
Suburban/Yukon/Tahoe/Yukon XL 1500/2500 |
NP246 |
Frequently Asked Questions:
What do I do with the OEM anti rattle clip when installing this upgrade?
You can discard the factory clip during installation of this kit. Its been designed to work with the clip removed.
What other parts will I need to install this upgrade kit?
We tried to make the kit all inclusive for a basic installation. This is taking into consideration of course that its being installed as preventative measures. If its being installed as part of a repair or after pump rub has occurred, there is no real way to know the extent of the damage inside the case until it is torn down. Most times, as long as the case has not run out of fluid, it can usually be repaired with a new rear housing and seal and prevented from ever happening again using the upgrade kit. Regardless of the reason for installing this upgrade, you will need to refill the transfer case with oil. We recommend our Performance Transfer Case Oil for use in ALL transfer cases.
WARRANTY INFO:
Lifetime
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- Delivery to the USA:
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- 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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★★★★★ 5
Excellent
Excellent reflections on the most important subject. This book provides and intermediate Christology. It brings the Biblical text and conciliar theology to help illuminate current discussions and debates on the person and work of Christ. Highly recommended.
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Reviewed in the United States on February 11, 2024
★★★★★ 5
Exactly what my sink needed!!
Color: Black, Color: Black
Okay, this thing turned out to be way more useful than I expected. It’s big enough to actually hold everything — sponge, scrub brush, even the soap dispenser — without looking cluttered or crammed together. Plus everything dries faster, so my sink area finally doesn’t look like a wet chaotic mess all the time. 😅
The quality is really solid too. Feels sturdy, doesn’t rust, and was super easy to install. It stays put and keeps water from collecting around the sink, which honestly makes cleanup so much easier.
Such a simple little product, but it really does make the kitchen look cleaner and more organized. Definitely recommend.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Worth the price !
Color: Black
This is a great way to put everything together. Everything on the counter looks organized and it’s a great wayto get all your sponges and dish soap and everything to look nice. I was pleased that it is well-made and sturdy. It’s very handy and I’m very happy with it. I’ve been using it for about a week. I have bought different products in the past which were OK but this one holds everything not just some. Do you highly recommend it it is worth the price !!
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Reviewed in the United States on June 1, 2026
★★★★★ 5
It’s sturdy, easy to assemble
Color: Black
I really like this sink organizer. It’s sturdy, easy to assemble, and keeps my sink area neat and clutter-free. It holds soap, brushes, and sponges perfectly, while draining water well and staying clean without rusting.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Space-Saving and very practical sink organizer
Color: Black, Color: Black
This sink caddy is a great addition to my kitchen- The 90-degree L-shaped design fits perfectly in the corner of the sink, making excellent use of space without cluttering the countertop. It easily holds sponges, brushes, and soap, keeping everything organized and within reach.
The metal construction feels sturdy and well-made, and it stays stable without sliding around. I also like that it allows items to dry quickly, which helps keep everything more hygienic.
Overall, it is a simple but very functional organizer that keeps the sink area neat and efficient. Highly recommended for anyone looking to save space and stay organized.
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Reviewed in the United States on April 19, 2026