2003 4L80E Master Kit Builder
Build your own 2003 4L80E rebuild kit. Every part below is checked to fit a 2003 4L80E, so the valve body, solenoids and kits match your year. Most parts come in two choices: Regular (direct replacement) or Upgrade (heavy-duty or performance). Pick only what your job needs and skip the rest.
1 Tick the parts you need2 Your total updates at the bottom3 Click Add selected to cart and check out once
Rebuild and Overhaul Kits
Rebuild / overhaul kit pick one
$165.99
Solenoids
Shift solenoids A and B
$39.99
Solenoid kit pick one
$113.99
$120.99
Bands
Band
$79.99
Sprags and Roller Clutches
Sprag / one-way clutch
$76.99
Shift Kits
Shift kit
Upgrade
Verified for 2003 • fits 1991-2009
$116.99
Filter, Pan and Pan Gaskets
Transmission pan pick one
$66.99
$74.99
Filter and gasket kit
Upgrade
Verified for 2003 • fits 1999-2006
$28.99
2003 4L80E year notes for techs
- Valve body (1997-2003): Second-generation VB for center-lube case: lube hole relocated, no two small holes on upper right. (source)
- Internal harness (1994-2003): Rostra 350-0032 / GM 24222798 internal harness (temp sensor in harness); fits 1994-2003 natively and 1991-1993 only if the external connector is updated. (source)
- Pump (1997-2003): Pump body redesigned (bridge in cooler passage, casting 24205779, wider bushing; retro-fits back to 1991, so the body is effectively '91-up). (source)
- Clutches (1999-2009): Intermediate backing plate becomes flat .275 in thick ('99-later); friction counts unchanged per Raybestos '96-on pack. 4L85E friction counts not separately confirmed. (source)
- Band (1999-2009): Wider 1.250 in front band with longer front servo apply pin; band and pin must match case year. (source)
- Case (1997-2003): Case type 2: return cooler line moved toward center of case into a center-support seal (center lube); front boss left unmachined and hole blocked. (source)
- Switches and sensors (1995-2009): External NSS / MLPS on selector shaft; long manual shaft (Sonnax 38511-04K '95-later). (source)
- Overhaul kits (1997-2003): Kits grouped 1997-up / 1997-2011 (34008EA 1997-Up, Precision 1997-2011 with or without molded pistons) because of center-lube case, bonded pistons and later filter. (source)