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  • Chatter on acceleration
  • Distress on pulley #1, #2 & chain surface
  • Ratio errors


Bore wear at the UV reduction valve allows pressure loss that compromises pulley control.


Renew critical clearances and regain pulley control by reconditioning the bore and installing Sonnax oversized UV reduction valve kit.

01J, 01T

Oversized UV Reduction Valve Kit
Part No. 33741B-08K

You need this if... View Instructions

Problems caused by UV reduction pressure leakage in Audi 01J and 01T units are common. As leakage increases, reaction time drops and pressure decreases at pulley #1 or pulley #2. Without proper control pressure and reaction timing, load on the chain decreases and slippage will occur. In other instances, the UV reduction damper pin may break causing further damage to the bore and end plug. The Sonnax oversized UV reduction valve kit 33741B-08K restores the critical hydraulic clearance between the valve and bore and prevents future wear with highly wear-resistant materials and annular grooves.

  • Valve is hardcoat anodized to reduce wear
  • Restores proper hydraulic sealing and OE pressure control
  • Valve
  • Damper Pin

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Audi 01J Valve Body Layout

Vw audi 01j vbl

Audi 01T Valve Body Layout

Vw audi 01t vbl

July 07, 2015

VW/Audi 01J/01T Valve Body Identification Guide

Topics: Identification Guides Transmission VW/Audi 01T Transmission 01J Transmission

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September 30, 2005

Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

Gregg Nader

Topics: Diagnostics And Theory Transmission

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  • 33741b 08k combo
  • 33741b 08k
  • 33741b 08k measure

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

  • 33741b 08k 01ttest
  • 33741b 08k 01jtest