• TCC apply & release concerns
  • Overheated converter
  • Engine stall at idle
  • Loss of fuel economy


TCC control bore wear allows critical pressure loss that causes TCC apply and release concerns.


Recover hydraulic control and renew TCC operation by reconditioning the bore and installing Sonnax TCC control valve sleeve.


This part only fits '03-earlier units with a .354" dia. OE TCC control valve. Measure OE valve spool diameter as shown here to confirm application.

Do NOT install this part if the OE valve measures .412".

4T40-E, 4T45-E

TCC Control Valve Sleeve
Part No. 33000-03

Fits '03-earlier, .354" dia.

View Instructions Find a Distributor

Vehicles with GM 4T40-E and 4T45-E transmissions often have torque converter control valve apply and release problems and torque converter overheat issues. This is caused by TCC control valve bore wear and the TCC valve sticking. Sonnax TCC control valve sleeve 33000-03 restores proper clearances and allows the reuse of the OE valve in a wear-resistant sleeve.

  • Sleeve eliminates sticking of the control valve in the apply and release positions
  • Reaming the bore and installing Sonnax sleeve restores worn OE control valve bore

Tool kit F-33000-TL, required for installation of this part, is no longer in production. Tool kit may still be available for purchase out of distributor stock. Check with your distributor for availability.

  • 4T40-E, 4T45-E TCC Control Valve Sleeve 33000-03
  • 4T40-E, 4T45-E TCC Control Valve Sleeve 33000-03