P0736: Reverse Incorrect Gear Ratio
4 vehicles · 4 makes · $300-$3,500 repair
Most Reported On
P0736 is an OBD-II diagnostic trouble code meaning “Reverse Incorrect Gear Ratio.” This code means the transmission control module calculated that the actual gear ratio in reverse does not match the expected ratio. The module compares input (turbine) speed to output speed to verify the transmission is in the correct gear; a mismatch in reverse indicates slipping or a hydraulic/mechanical problem in reverse. Symptoms include the vehicle slipping in or refusing to engage reverse. Internal clutch wear, low fluid, or solenoid faults are typical causes. This code is most commonly reported on 2024-2025 Ford F-150, 2004 Jeep Grand Cherokee, and 1996-2002 Mercedes-Benz C-Class, plus 1 other vehicle, with repair costs ranging from $300 to $3,500.
Common Causes
Typical Repair Cost
Based on 5 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0736.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (4)
FAQ
What does P0736 mean?
P0736 stands for "Reverse Incorrect Gear Ratio." This code means the transmission control module calculated that the actual gear ratio in reverse does not match the expected ratio. The module compares input (turbine) speed to output speed to verify the transmission is in the correct gear; a mismatch in reverse indicates slipping or a hydraulic/mechanical problem in reverse. Symptoms include the vehicle slipping in or refusing to engage reverse. Internal clutch wear, low fluid, or solenoid faults are typical causes.
What are the most common causes of P0736?
The most common causes of P0736 are: Worn reverse clutches/bands (internal slippage), Low or dirty transmission fluid, Faulty shift or pressure control solenoid, Internal hydraulic pressure loss, Valve body fault, Faulty speed sensor giving bad ratio data, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0736?
Repair costs for P0736 range from $300 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by P0736?
Au7o has documented P0736 across 4 vehicle models from 4 manufacturers: Ford, Jeep, Lincoln, Mercedes-Benz.
Sources (10)
- articleNHTSA Recall 25V164000 — Ford Transmission Valve Body Machined Incorrectly (25S19)
- TSBDaimlerChrysler TSB 08-016-05: TCM Internal Fault May Cause Low Line Pressure or Gear Ratio Error DTC
- Manual2004 Jeep Grand Cherokee 45RFE/545RFE Hydraulic Pressure Test
- Manual2004 Jeep Grand Cherokee Transmission Diagnostic Overview
- articleMercedes 722.6 5G Transmission Valve Body Conductor Plate Replacement - YouCanic
- articleHere's What A 'Conductor Plate' Is And Why It Kills So Many Mercedes Vehicles - The Autopian
- Forum722.6 Conductor Plate Failure - PeachParts Mercedes-Benz Forum
- TSBFord TSB 22-2428: 10R60/10R80/10R80 MHT Harsh or Delayed Engagement and Shift
- ForumW5A580 Transmission Limp mode — Jeep Enthusiast Forums
- articleJeep Grand Cherokee Transmission Problems & Cost — W5A580 — Transmission Repair Cost Guide
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.