These are the most common symptoms associated with a damaged or grooved quill on a transmission. It is also referred to as the snout, bearing carrier, or case extension. In most cases it is an integral part of the transmission case & cannot be replaced. The logical solution is to replace the case or the transmission. Both options are expensive & time consuming, neither of which solves the problem permanently.
THE CAUSE
In the operation of the clutch, the release or throw-out bearing slides on the clutch snout or quill, allowing you to engage and disc-engage the clutch mechanism. Due to various reasons the quill becomes grooved over time. If the quill were made of a harder metal than aluminum, this would not be as common. The most common causes are: improper clutch adjustment, defective clutch assemblies, stop & go traffic, keeping your foot on the clutch (commonly referred to as riding the clutch), loss of lubricant, heat, & etc.
THE EFFECT
The effects of these grooves on the clutch operation are catastrophic. They cause: premature clutch disc wear, premature bearing failure (further adding to the problem), sticky &/or jerky pedal travel, rattling clutch forks, transmission damage, etc.
THE SOLUTION
The Transmission Sleeve Kit (TSK) solves this problem by utilizing a sleeve, precision machined of 304 Stainless steel, which slips over the original quill. This provides a smooth, hard surface for the oversize bearing to slide on. It is anchored with set screws and is removable & re-usable. As in the case of the Subaru, it must be removed in order to allow any transmission repairs.
- 2004 - 2012 Subaru Legacy GT (Replaces Subaru Part: 30502AA120)
- 2004 - 2006 Subaru Baja Turbo (Replaces Subaru Part: 30502AA120)
- 2004 - 2008 Subaru Forester 2.5l Turbo (Replaces Subaru Part: 30502AA120)
- 2006 - 2019 Subaru WRX (Replaces Subaru Part: 30502AA120)
- 2005 - 2009 Subaru Outback Turbo (Replaces Subaru Part: 30502AA120)
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