OEM 24230298 4L60E 1-2 Shift Solenoid: Symptoms, Specs & Install

If you searched for 24230298, this is the part. 4L60E 1-2 Shift Solenoid for the 4L60E. Below: what fails, what the symptoms look like, resistance specs to test before replacing, and the step-by-step install procedure.

What it does

Activates the 1-2 shift valve to engage second gear. Pulse-width-modulated by the PCM during shift events.

Fitment

1993-2008 GM trucks, SUVs, and cars with 4L60E or 4L65E.

Common failure symptoms

P0753, P0973, no 1-2 shift, stuck in first, no upshift from first

Electrical specs

Run a resistance check before condemning the solenoid. Bad wiring, corroded harness pins, or a failing PCM driver can cause the same symptoms as a bad solenoid. Eliminate cheap causes first.

Replacement procedure

1. Drop transmission pan and remove filter
2. Locate solenoid on the valve body driver side
3. Disconnect harness clip
4. Remove 8mm bolt securing the solenoid bracket
5. Pull solenoid straight out — do not pry against the valve body
6. Lubricate O-ring with fresh ATF before reinstalling new solenoid
7. Torque mounting bolt to 8 ft-lbs
8. Replace filter, gasket, and refill with Dexron VI

Estimated time: 1 hour for someone who has done this before, 2-3 hours for first-timers. Tools needed: 8mm and 10mm sockets, snap-ring pliers (if removing the valve body), torque wrench, drain pan, fresh ATF.

Related diagnostics on Gearbox Insider

4L60E rebuild parts guide • Shop by transmission symptom • Solenoid testing without a factory scan tool