sonnax-black Facebook-color LinkedIn-color maillink printlink r_and_r_only SERVOFIX-logo-web Twitter-color VBFIX-logo-web video-logo-web warranty_only Youtube-color


  • Chatter on Forward
  • Delayed Forward
  • Harsh Forward


Low or excessive forward (V clutch) pressure due to worn SIV safety bore.


The Sonnax oversized safety valve has been redesigned with annular grooves and is made of upgraded materials to help prevent wear and restore proper hydraulic control.

01J, 01T

Oversized Safety Valve
Part No. 33741B-01

You need this if... View Instructions

A common issue with Audi 01J and 01T units is chatter during engagement or harsh forward engagement. This can be caused by a worn safety valve bore. The Sonnax oversized safety valve 33741B-01 restores V-clutch engagement.

  • Valve is hardcoat anodized and features annular grooves to reduce wear
  • Restores proper hydraulic sealing and OE pressure control

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

Read Now
  • 33741b 01 combo
  • 33741b 01

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 01 test1
  • 33741b 01 test2