P0732: Gear 2 Incorrect Ratio
Key takeaways
- P0732 means the transmission computer compared input and output shaft speeds in second gear and the ratio didn't match what second gear should give.
- The usual feel is a flare in rpm or a slow, soft 1–2 shift; many cars also go into limp mode.
- Check fluid level and condition first, then shift solenoids and the valve body; worn clutches inside the transmission come last.
- Ford, Ram and Nissan bulletins naming P0732 range from software and service procedures to an internal thrust washer failure on 2024 Ram heavy-duty trucks.
- Fixes range from about $100 for a software update to $3,000–$5,500 for a rebuilt or replacement transmission.
What P0732 means
Your transmission isn’t turning at the speed it should in second gear, which usually means something is slipping. Scanners call it Gear 2 Incorrect Ratio. The transmission computer knows the ratio second gear should give. It reads input shaft speed (or engine speed) and output shaft speed, and when the ratio between them stays outside its limit while second gear is commanded, it stores P0732. Most often a clutch or band isn’t holding fully. Now and then a speed signal is wrong and nothing is slipping.
Is it safe to drive?
Short trips, gently, to get it diagnosed. Many cars go into limp mode with P0732 and hold one gear, so the car feels slow and revs high. The bigger issue is heat: a slipping clutch burns its lining and cooks the fluid, which damages everything else in the transmission. What changes the answer: the engine flares in rpm without the car picking up speed, it won’t move in drive, or the fluid smells burnt. Any of those, stop driving and have it towed.
Causes, ranked
| Cause | How you confirm it | Typical cost (US independent shop, 2026) |
|---|---|---|
| Low, old or burnt fluid | Level and condition on the dipstick or check plug; leaks underneath | $20–$100 top up; $150–$300 fluid service |
| Software needing an update | A bulletin covers your make, model and year | $100–$200 |
| Faulty speed sensor or wiring making a false ratio | Input or output speed drops out in live data; codes like P0715 or P0720 alongside | $100–$300 sensor; $100–$250 wiring |
| Sticking shift solenoid or valve body | Solenoid codes, flare only on the 1–2 shift, pressure test | $300–$1,200 |
| Worn second-gear clutch, band or internal part | Slip persists with good fluid, sensors and software; debris in the pan | $3,000–$5,500 rebuild or replacement |
What to check first
- Check the fluid. Level with the procedure for your car (many need a hot check at idle), then color and smell. Clean red or pink is good; brown, black or burnt is not. Drips underneath? See the red fluid leak guide.
- Look for a bulletin on your exact car before buying parts.
- Read all transmission codes. A solenoid or speed sensor code stored with P0732 changes the diagnosis.
- Watch the live data on a test drive. A shop compares input and output speeds through the 1–2 shift. A true slip shows as a flare; a sensor fault shows as a dropout.
- Then pressure test and pull the pan. Clutch material and metal in the pan point to internal wear.
- Don’t clear it and drive as a fix; if the slip is real, the code comes back.
The bulletins show a pattern among trucks. Ford’s cover 10-speed transmissions (10R60, 10R80, 10R140) with harsh or delayed shifts, with software and service procedures. Nissan’s Titan XD bulletin tells dealers to confirm whether a campaign has been done first. Ram’s 2024 2500 and 3500 bulletins name a failed rear selective thrust washer, which is internal.
What it costs
The cheap outcome is a software update or fluid service at $100–$300. The common outcome is a solenoid or valve body repair at $300–$1,200. The expensive outcome is worn clutches and a rebuilt or replacement transmission at $3,000–$5,500. A proper transmission scan and test drive cost far less than guessing, and they keep a sensor fault from being sold as a rebuild. If the car jerks while driving, mention when it happens.
Related codes
P0732 often comes with P0730 (general ratio fault) or ratio codes for other gears such as P0731 and P0733; several gears at once points toward fluid, pressure or a clutch they share. The engine computer may also show P0700, which only flags that the transmission module has a code. 32 complaints filed with NHTSA mention P0732, led by the Chrysler Pacifica with 8, six of them 2017 models; a complaint is an owner report, not a confirmed cause.
What owners report to NHTSA
32 complaints filed with NHTSA mention P0732, 21 of them since 2015, across 14 different models. The component owners most often filed it under: power train.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| CHRYSLER PACIFICA | 8 | 2006, 2017, 2018 |
| FORD F-150 | 5 | 2013, 2016, 2018 |
| FORD ESCAPE | 4 | 2008, 2014 |
Manufacturer service bulletins that name P0732
63 technical service bulletins and manufacturer communications filed with NHTSA mention P0732, from 8 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- RAM 3500 (2024), bulletin 11009478: "Rear Selective Thrust Washer Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): P0218-00 - Tr…
- RAM 2500 (2024), bulletin 11010661: "Rear Selective Thrust Washer Failure Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following DTCs: P0218-00 - Transmission High Temperature O…
- FORD EXPEDITION (2018, 2019, 2020, 2021), bulletin 10234596: Some 2017-2020 F-150, 2018-2021 Expedition/Navigator/Mustang and 2019-2023 Ranger vehicles equipped with a 10R80 automatic transmission may exhibit a harsh engagement/harsh shift/delayed shift. It is possible the vehicle…
- LINCOLN NAVIGATOR (2018, 2019, 2020, 2021), bulletin 10236680: Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or wi…
- FORD TRANSIT (2020, 2021, 2022, 2023), bulletin 10236680: Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or wi…
- LINCOLN AVIATOR (2020, 2021, 2022, 2023), bulletin 10241447: This article supersedes TSB 22-2428 and 23-2176 to update the Issue, Action and Service Procedure. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 20…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.
Frequently asked questions
What does P0732 feel like?
Usually the engine revs up during or after the 1–2 shift without the car speeding up to match, or the shift feels slow and soft. Some cars bang into gear instead, or go into limp mode and stay in one gear.
Can low transmission fluid cause P0732?
Yes. Clutches are applied by fluid pressure, and low or worn-out fluid lets them slip. It's the first thing to check. If the fluid is already burnt, a fluid change alone may not bring back a clutch that has worn.
Can I drive with P0732?
Short trips, gently, to get it diagnosed. Slipping makes heat and heat wears the transmission faster. If it flares badly, won't move, or the fluid smells burnt, have it towed.
Is P0732 always a transmission rebuild?
No. A software update, a solenoid, the valve body or a speed sensor fault can set it. A rebuild is the answer only when the fluid, sensors and hydraulics check out and it still slips.