Merchant Automotive 10381 Transfer Case Upgrade with Drain Plugs
SKU: 65985527552

Merchant Automotive 10381 Transfer Case Upgrade with Drain Plugs

$79.13 $87.92
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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
If you already have a hole in your case, its recommended to install a new rear housing for a proper repair.  Lifetime warranty will only apply to installations with a new rear housing.
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.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 65985527552

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Mavrick
Cuba, US
★★★★★ 5
excellent
Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar
The light is impressive with six modes. The wiring harness was already prewired relay and a protective cover over the wiring. One problem was the sizeable in-line connector for the switch made it difficult to place it inside the vehicle due to the length of the wire. Negative--The mode switch will not work unless the power is on and no indication of which mode it is currently in.
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Reviewed in the United States on December 27, 2022
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Alaska resident
San Leandro, US
★★★★★ 5
Simple, easy, quick!
Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar
I installed this light at on my 25hp New Holland Tractor for some light assistance with plowing snow. Very easy to install and provided a ton of light that was needed. Wish I had a photo to share.
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Reviewed in the United States on December 19, 2023
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Amazon Customer
Natrona Heights, US
★★★★★ 3
Eh
Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar
Only work with nilight switch control
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Reviewed in the United States on January 19, 2026
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james l.
Omaha, US
★★★★★ 2
Condensation
Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar
This is my 2nd purchase and this last order I accumulated condensation in the front lens. My 1st one didn’t have this issue.
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Reviewed in the United States on July 23, 2024
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James L Smith
Houston, US
★★★★★ 5
Amber light bar
Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar, Color: 1PC Amber White 6 Modes Lights + Wiring, Size: 12Inch Light Bar
Brought it for my atv because I couldn’t find a led light bulb
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Reviewed in the United States on September 19, 2022

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