Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Merchant Automotive 10001 Transfer Case Pump Upgrade KitThe Merchant Automotive 10001 Transfer Case Pump Upgrade Kit 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
The Merchant Automotive 10001 Transfer Case Pump Upgrade Kit 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
- 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:
- 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
4.7 ★★★★★
Based on 1638 reviews
Sort
Product Reviews
★★★★★ 3
Nice product
Nice watch but watch face was too large for my wrist.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 1
Watch is defective.
Watch appears to be a previous return. It was shipped without a box. It is defective. Cannot set day of the week. Seller approved return.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2025
★★★★★ 5
La cuerda es larga
La caja del reloj es pequeña, pero el color es lindo y es un poco pesado
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 29, 2025
★★★★★ 4
Solid watch for the price
I have numerous nicer watches and often times I find myself wearing my Casio instead. The dial looks very striking for such an inexpensive watch and you don’t need to wind it so it always keeps time. The brushed metal looks very nice too. It’s pretty light weight and fits my wrist fine although I had to remove links when I got it. It’s also very easy to read. Would recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2026
★★★★★ 5
Very nice watch
Nice watch. Took me 5 mins to adjust the watch wrist, not bad at all, go watch YouTube if you don’t know how to adjust the wrist, very easy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 28, 2024
recommand products
HKM-398035 2.4GHz 1/20 Scale 4WD RC Drift Car Toy for Kids with Remote Control, LED Lights, and Ready-to-Run Features
69.99
HKM-712211 Mini Crawler Remote Control Stunt Car, Electric Toy for Indoor and Outdoor Fun
54.99
Covercraft XW815UB Custom Fit Personal Watercraft Cover
182.00
Gachiakuta Rudo Anime T Shirt Black
35.95
HKM-695251 1/10 Scale High-Speed Remote Control Drifting Off-Road Car for Ages 8 and Up
101.50