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Throwout Bearing UPGRADE/REPAIR KIT 4.0L V6 w/ 6 Speed Manual Transmission

The kit comes complete with a  303 Stainless steel sleeve, set screws & hex wrench, oversized release bearing, hi-temp grease packet, notification sticker, & instructions. 1 year, unlimited mileage, warranty.



REPLACES TOYOTA # 31230-60230 used in with the Toyota 1GR-FE 4.0L w/ 6 speed manual Transmission.

The design of the throw out bearing assembly used on Toyota trucks can cause uneven wear on the aluminum shaft that the throw out bearing rides back and forth on.  The release fork can cause side loading of the bearing as it rides back and forth on the shaft and that can cause uneven wear.  When this occurs the throw out bearing becomes loose and can rock back and forth, bind and can cause excessive noise.  This sleeve repair kit consists of a precision machined 303 grade stainless steel sleeve that is pressed onto the stock aluminum shaft and is anchored with the included set screws.  A new bearing that has been modified to fit over the sleeve is included.  Special water proof grease is provided to ensure smooth operation of the new bearing on the stainless sleeve.







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.


In the operation of the clutch, the release or throw-out bearing slides on the clutch snout or quill, allowing you to engage and disengage 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 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 Transmission Sleeve Kit (TSK) solves this problem by utilizing a sleeve, precision machined out of 303 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 & reusable. As in the case of the Subaru, it must be removed in order to allow any transmission repairs.


After installing the Transmission Sleeve Kit (TSK) you have eliminated the problem forever! You will notice a smooth, fluid like, feel to the pedal. Your engagements will be smoother. Your clutch will last longer. This, in turn, will reduce the wear on your transmission.  It will never groove again!

Note- Not compatible with Centerforce Clutches.

Year Make Model Engine
Year Make Model Engine
2005 - 2015 Toyota Tacoma V6 4.0L 1GR-FE
2005 - 2015 Toyota Tundra V6 4.0L 1GR-FE
2007 - 2015 Toyota FJ Cruiser V6 4.0L 1GR-FE
Weight 3.00 lbs
Dimensions 6 × 6 × 6 in

3 reviews for Throwout Bearing UPGRADE/REPAIR KIT, 4.0L V6 w/ 6 Speed Manual Transmission

  1. Richard McManus

    I was in the process of having warranty work done for my throw out bearing, after some research the Toyota replacement warranty throw bearing is the same part that was installed stock from the factory and the aluminum would eventually wear out again and cause the squeaking. After having the throw out bearing replaced within days I installed this upgrade. The Toyota replacement is decent but this URD upgrade made the pedal smoother then the OEM replacement.

  2. Dave Holley

    I just finished installing this upgrade kit this evening. Although the job itself is a labor intensive undertaking, the actual install of this sleeve and new bearing couldn’t be easier. The machine work on this part is flawless! I expected to have some play in the sleeve or to have it too tight going onto the transmission quil, but was instead pleasantly surprised to have it fit on with just the right amount of resistance. It is a very high quality kit with everything needed for installation included in the package. The clutch no longer makes any “chirping” noise and the pedal feels very nice and fluid. Time will tell how long it will last…but from the reviews of others, I am anticipating never having to think about it again. Between this kit and the URD short throw shifter kit, I am a major fan of their work and will definitely be a repeat customer! Only thing missing was my “URD” sticker? Didn’t get one.

  3. Michael Hayes

    I had a problem with the TOB as most people did with Toyota FJ, the dreaded chirping sound. I did the TSB that was issued, but no luck. I looked on the FJ Forum and everybody was raving about this kit. I bought it, received a tracking number with in a few hours, had it a couple days later. This kit works!! Shifts better, no more chirping!!! Don’t understand why Toyota did not do this., If you are replacing the clutch, you need this! I have a 07 FJC! Thank you for this kit.

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