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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
4.0 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Great for Sensitive Skin
Size: 32 Fl Oz (Pack of 1)
I’m a 30 yr old woman with very sensitive skin, eczema, and dermatitis. Even Castile soap makes my scalp burn. I have tried many shampoos but all have caused scalp irritation almost immediately. Luckily I found this shampoo. It has a very nice, natural type of scent, which I love. It has never caused any irritation on my scalp. It does not lather as much as most shampoos, but it is just as effective at removing oil and skin buildup. I think it’s a good value given the organic ingredients and the care in avoiding harmful surfactants and other chemicals. This refill bag lasts me about 3 months and I have very long, almost waist length hair. I am very satisfied and I have bought this many times and will continue to do so. I hope the formula never changes!
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Reviewed in the United States on June 25, 2025
★★★★★ 5
For babies and fur babies
Size: 8 Fl Oz (Pack of 1)
This is a great baby soap. It smells pleasant, lathers well and mostly importantly gets your baby clean without leaving them too dry. The ingredient list is quite healthy. I'm a fan.
I've also used this on my pets with great success. My cat and dog both were washed with this. Their skin wasn't irritated, they weren't red looking nor did they have an allergic reaction to the product. I find this to be far better than anything actually for pets. For a small pet this bottle last quite a while. The larger pets you'd need to use more of it more so considering how dirty they can get.
Overall for my family's needs this has been a very great buy.
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Reviewed in the United States on June 30, 2025
★★★★★ 5
One of the best kids products
Size: 16 Fl Oz (Pack of 1)
Really nice baby and kid shampoo. Never had complaints about getting in eyes. Nice smell, clean. It's not cheap but probably one of the best out there.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Finally a great product
Size: 16 Fl Oz (Pack of 1)
Arrived well packaged and protected. Great scent, very gentle with my curly hair. Produces a nice lather and leaves hair feeling fresh and clean—not stripped. I also scanned it with Yuka and was really pleased with the good rating for ingredients, which was a big plus for me. Will buy again and try other products from the brand
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Reviewed in the United States on January 21, 2026
★★★★★ 4
No Babies, Just An Adult With Eczema
Size: 8 Fl Oz (Pack of 1)
No babies here, I bought this for myself because I was recently diagnosed with Eczema and have been searching for something gentle and non-irritating but also natural and a shampoo/body wash combo for quickie showers. I was leaning toward something entirely unscented and marketed toward adult skin conditions, but I happened upon this, did some reading on their website and it actually looked pretty good, so I ordered.
I was very curious how it would smell since some reviews say "it stinks" or it smells like men's cologne, etc. yet others say they loved the smell. It really shows how different preferences are, because to ME, I think perfumey mainstream shampoos "stink". I really like the scent of this but to try and help others I'll describe it as best as I can: It's an "earthy" first of all. Someone mentioned patchouli and while it's not nearly as strong as that, it is along the same lines as far as smelling sort of "woody". In the hair it smells a little like Sandalwood for those who know that smell. I have a good nose (and use a lot of essential oils) so right off the bat I picked up both bergamot and cedarwood and sure enough, checked the label and there they are. I could absolutely understand some people thinking of it as somewhat masculine, but it definitely doesn't smell like cologne in my opinion. I'm a little bit of a hippie/earthy type so it's right up my alley but if you prefer flowery, more mainstream scents from a drugstore shampoo you may not care for it. Seems like an unusual scent for a baby product I'll admit, but I like the scent nonetheless and would use it my baby if I had one. The scent remains after my hair is dry but only very lightly. If I lift my long hair to my nose and breathe in it's there but I don't think it's strong enough for anyone else to smell unless they're hugging me or something. I'm sensitive to most scents in bath/body products and this isn't at all overwhelming for me.
It worked great, a little thin for my taste but I think all baby shampoos are that way, I can't remember. It made my hair feel soft even while still wet in the shower, and it felt nice and soft after it dried. It doesn't lather a whole lot, but I don't care about lather as long as it works. People tend to be fooled into thinking lather somehow equals effectiveness and that's not true. I've only used it once, but so far it has not aggravated my eczema which was my main reason for buying it, so that's good.
My only complaint, and for me it's enough to stop me from buying it again, is the price! Now this is my own fault I realize, but I bought this not fully paying attention to the fact that it's 8 ounces. I saw the size, but it didn't register in my head how small that is. Now, I know nothing about bathing babies and how long a small bottle would last so maybe it's a fine size for that, but this little bottle won't last long at all using it as both shampoo and body wash for an adult, and there's no way I'll pay that much again now that I realize how small it actually is for the price. I saw a 16 ounces size, but it's still too pricey for my budget, I'll just opt for a natural sulfate-free shampoo for grownups when this bottle is done. Too bad too, because I do love the scent.
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Reviewed in the United States on January 15, 2015
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