47RE Overdrive Solenoid Replacement: No Lockup Or 4th Gear Fix

47RE overdrive solenoid failure costs you 4th gear (overdrive) and converter lockup. RPM climbs at highway speed, MPG drops, and codes appear. Fix is straightforward.

Related 47RE guides

Shop the parts for this fix

Doing the whole job? 47RE Master Rebuild Kit - Frictions & Steels, Gaskets & Seals, Filter, Shift Kit, Servo, Solenoids, Bushings (7-Piece) — $346.99 $364.99 (save 5% vs buying separately)

Or grab the individual parts:

47RE Governor Pressure Solenoid Kit 2000-2025
The part for this fix
47RE Governor Pressure Solenoid Kit 2000-2025
$46.99 · In stock
Shop This Part →

What the overdrive solenoid does

Function:

  • Engages overdrive (4th gear)
  • Engages TCC (converter lockup) usually combined
  • PWM controlled by PCM
  • Critical for highway efficiency

Symptoms when failed:

  • No 4th gear engagement
  • High RPM at cruise (3000+ at 70 MPH)
  • MPG drops 3-5 MPG
  • P0743 - overdrive solenoid electrical
  • P1740 - TCC/OD solenoid

    • Where the solenoid is

    Location:

  • Top of valve body
  • Driver side of trans
  • Inside the pan (must drop pan)

    • Wiring:

  • Single connector
  • Internal harness routes to external connector
  • External connector at driver side of case

    • Common failure modes

    Coil opens:

  • Most common
  • P0743 code sets
  • No overdrive at all

    • Plunger sticks:

  • Intermittent operation
  • Sometimes works, sometimes not
  • Random codes

    • Internal seal leaks:

  • Pressure bypasses
  • Weak overdrive engagement
  • Soft 4th gear shift

    • Diagnosis

    Step 1: Pull DTCs

  • P0743 - confirms overdrive solenoid circuit
  • P1740 - TCC/OD combined fault
  • P0750 series - other solenoid issues

    • Step 2: Test resistance

  • Disconnect external connector at trans
  • Probe overdrive solenoid pins
  • Spec: 1-5 ohms
  • Open = bad coil
  • Short = bad solenoid

    • Step 3: Pressure test

  • Tee gauge into overdrive apply circuit
  • Pressure should rise on command
  • No pressure rise = solenoid or hydraulic issue

    • Replacement parts

    OEM Mopar solenoid:

  • $50-$120 part
  • Same as factory
  • Lifespan: 80-150k miles

    • TransGo HD solenoid:

  • $80-$150 part
  • HD coil winding
  • Better for tuned trucks

    • Always replace together:

  • Pan gasket
  • Filter
  • 13 quarts ATF+4

    • Install procedure

    Trans does NOT come out:

  • Pan drop only
  • 4-5 hour DIY total
  • Major advantage

    • Tools needed:

  • Standard sockets (10mm, 13mm, 15mm)
  • Torque wrench
  • Drain pan
  • Magnetic pickup tool

    • Step-by-step:

  • Drain fluid via pan
  • Remove pan bolts (15-16 bolts)
  • Drop pan
  • Remove valve body bolts (10mm)
  • Drop valve body
  • Locate overdrive solenoid (top of VB)
  • Remove retaining screws
  • Disconnect wiring
  • Pull old solenoid
  • Install new with new O-rings
  • Reconnect wiring
  • Reinstall valve body in sequence
  • Torque VB bolts (10 ft-lb)
  • New pan gasket, reinstall pan
  • Refill ATF+4 (13 quarts)

    • Cost

    DIY:

  • Solenoid: $50-$150
  • Gasket + filter: $35-$65
  • 13 qts ATF+4: $130-$190
  • Time: 4-5 hours
  • Total: $215-$405

    • Shop:

  • Parts: $215-$405
  • Labor: $350-$550
  • Total: $565-$955

    • While you are in there

    Recommended additions:

  • Governor pressure solenoid (similar failure mode)
  • Pressure sensor
  • TransGo shift kit
  • Read our 47RE shift kit guide

    • Why bundle:

  • Same labor for additional parts
  • Other solenoids likely worn
  • Avoid repeat tear down

    • What if it does not fix it

    If P0743 returns:

  • Wiring fault (most likely)
  • Check external connector pins
  • Test continuity to PCM

    • If overdrive still does not engage:

  • Valve body wear (Sonnax kit needed)
  • Overdrive servo worn
  • Read our 47RE valve body upgrades

    • If P1740 returns:

  • Combined TCC/OD code
  • Could be TCC converter wear
  • Read our TCC shudder (47RE similar)

    • HD upgrade considerations

    If truck is tuned:

  • HD overdrive servo
  • Sonnax HD kit
  • $150-$250 extra parts
  • Crisper overdrive shift

    • HD valve body:

  • TransGo HD shift kit
  • Adjusts apply pressures
  • Holds tuned HP better

    • Prevention

    Service fluid every 30k:

  • Solenoids depend on clean fluid
  • Old fluid varnishes solenoid plunger
  • Read our Trans fluid color chart

    • HD trans cooler:

  • Cooler fluid = longer solenoid life
  • $300-$500 investment
  • Pays back in solenoid life

    • Bottom line

    Cheap fix when caught early:

  • $215-$405 DIY
  • 4-5 hours
  • Restores overdrive + lockup

    • Combine with related parts:

  • Governor solenoid same labor
  • Pressure sensor same labor
  • Shift kit same labor
  • $300-$500 extra parts for big upgrade

    • What you save:

  • MPG returns to normal
  • RPM drops at cruise
  • No further damage

    • Need 47RE overdrive solenoid, governor solenoid, or shift kit? Visit our 47RE catalog. OEM solenoids, HD kits, complete rebuild bundles. Free shipping over $70.

    Related: