Merchants Transfer Case Upgrade Kit comes with everything you need to repair and prevent the common pump rub failures experienced on GM trucks. This kit features a high quality CNC machined pump housing and includes the adapter gasket and RTV silicone sealant.
What Is Pump Rub Failure?
Pump Rub refers to a gear pump failure in GM transfer cases from 1998-early 2007. The gear pump works by forcing oil to the planetary as well as the drive sprocket sleeve. The gear pump is driven by a shaft, so the housing of the pump must “float” in the rear housing of the transfer case. The pump housing has tabs that fit into spots in the rear housing to locate the pump housing and prevent it from spinning inside the case with the main shaft. Over time, these pump tabs can wear on the rear housing and start to wear on the aluminum pump housing causing a small leak. Due to the location of the leak, many vehicles do not experience dripping while parked, but rather while driving, leaving it gone unnoticed. The transfer case on these vehicles do not have a low fluid indicator, which means that by the time the problem is noticed, it is usually too late.
Features & Benefits:
- Prevents Pump Rub Failure
- Can Be Used To Help Repair Previous Pump Rub Failure
- Stronger Replacement Components
- Aluminum Housing Replaces Old Housing
- Includes Install Components
- High-Quality Components
