P0736: Reverse Incorrect Gear Ratio
3 vehicles · 3 makes · $300-$7,000 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 2020-2023 Lincoln Aviator, 1996-2002 Mercedes-Benz C-Class, and 2004 Jeep Grand Cherokee, with repair costs ranging from $300 to $7,000.
Common Causes
Typical Repair Cost
Based on 4 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0736, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all 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 diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (3)
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 $7,000, depending on the vehicle and root cause.
Which vehicles are affected by P0736?
Au7o has documented P0736 across 3 vehicle models from 3 manufacturers: Jeep, Lincoln, Mercedes-Benz.
Sources (11)
- TSBTSB 23-2250 - 10R60/10R80/10R80 MHT Harsh/Delayed Engagement And/Or Shift (NHTSA)
- TSB10R60/10R80/10R80 MHT Automatic Transmission - 2021-2023 Ford & Lincoln (Ford OEMDTC)
- articleClass Action Filed Over Ford 10R80 Harsh Shifting
- 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
- 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
- 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.