Ts robothead 18in high trans rgb

Remanufactured Valve Bodies

Save Time & Money with a Premium Rebuilt Valve Body

Every valve body is completely disassembled, cleaned, updated, solenoids tested and replaced as needed. Each remanufactured unit is then hydraulically and electronically tested so it’s ready to install!

Sonnax remanufactured valve bodies are backed by a Limited Lifetime Warranty.

Call (856) 848-0908 for remanufactured valve body product support.

Outsmart 4L80 Overdrive Roller Clutch Failure

Gm033

The next time you have a 4L80/85-E in the shop, improve transmission performance and protect your warranty with Sonnax.

Featuring the Smart-Tech® overrun clutch valve kit pre-installed for unrivaled durability, these premium-quality remanufactured valve bodies will help keep your customers’ trucks working hard all year long.

  • Improves OD roller clutch holding power in lower gears
  • Extends the life of workhorse transmissions while preventing warranty claims and comebacks
  • Includes essential updates to correct shift problems and prevent future wear
  • State-of-the-art testing verifies AFL, clutch, and torque converter pressures match requirements for optimum functionality
  • Quick and easy to install
  • Smart-Tech overrun clutch valve kit (Part No. 34200-40K) also available separately

All Valve Bodies

A select number of Sonnax remanufactured valve bodies are available to distributors through the R&R (return & rebuild) service only.

Warranty only valve bodies are no longer in production. For service inquiries, please see details on Sonnax’s Limited Lifetime Warranty on remanufactured valve bodies.

Gm003

3T40 (125C)
Remanufactured Valve Body GM003

With 3-Prong 2nd Switch

Gm004

3T40 (125C)
Remanufactured Valve Body GM004

without 3-Prong 2nd Switch

Sonnax rebuilt valve body GM004 is no longer in production. Please check with your distributor for availability. For service inquiries, please see details on Sonnax’s Limited Lifetime Warranty on remanufactured valve bodies.