Merchant Automotive 10057 Transfer Case Pump Upgrade Kit with Fluid
2001-2007 GM 6.6L Duramax
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Merchant Automotive 10001 Transfer Case Pump Upgrade Kit with Fluid 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.
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.
- Merchant Automotive billet transfer case pump housing
- Transfer case adapter gasket at trans
- RTV Silicone
- Blue Threadlock
- Transfer Case Fluid
- Merchant Automotive sticker
|Transfer Case Model Number
|GM Silverado/Sierra - 1500, 1500HD, 2500, 2500HD, 3500
|NP246, NP261HD, NP263HD, NP261XHD, NP263XHD
|Blazer / Jimmy
|NP246, NP261, NP263, NP263HD
|Suburban/Yukon/Tahoe/Yukon XL 1500/2500
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.
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