How to Tell if Your Honda Accord Transmission Is Going Bad

If your Honda Accord’s transmission is failing, you’ll typically notice slipping or delayed engagement, harsh or erratic shifts, a low‑speed “judder” on CVT models, unusual whining or grinding, burning-smelling fluid, and warning lights or a flashing “D” indicator. Confirm by scanning for transmission trouble codes, checking fluid condition and level with the correct Honda fluid, and performing a careful road test; some Accord generations have known issues that can guide what to check first.

What to Watch and Listen For

Before you dive into diagnostics, pay attention to the everyday clues your Accord gives you. The following symptoms are the most common indicators of transmission trouble across automatic, CVT, 10‑speed, and e‑CVT hybrid variants.

• Slipping or flare: Engine revs climb without a matching increase in speed, or RPM spikes between shifts.
• Delayed engagement: A noticeable pause or thunk when shifting from Park to Drive/Reverse.
• Harsh, erratic, or missed shifts: Bangs, surges, or hesitation during upshifts/downshifts; hunting for gears.
• Judder at low speeds (CVT): Shuddering or vibration when taking off or creeping in traffic.
• Whine, buzz, or grinding: Gear or bearing noises that rise with road speed can point to internal wear.
• Overheating or warning indicators: Check Engine light, transmission temp warning, or a flashing “D” on some older models.
• Burnt or contaminated fluid: Dark/brown ATF or CVT fluid with a burnt odor, or metal flakes on the magnet/dipstick.
• Leaks: Red/pink (ATF) or amber (CVT) fluid spots under the car, often at cooler lines, axle seals, or case seams.

One symptom alone doesn’t confirm failure, but multiple signs—especially paired with warning lights—strongly suggest a transmission issue that merits prompt diagnosis.

Dashboard and Diagnostics

Warning Lights and Messages

On many Accords, a transmission problem will set the Check Engine light and, on some older automatics, a flashing “D” indicator. Newer cars may show transmission temperature or powertrain warnings and can enter “limp mode” to protect hardware.

Scan for Trouble Codes

A proper scan with an OBD‑II tool that can read the transmission control module (not just generic engine codes) is essential. The list below outlines common code families that point to specific problems.

• P07xx (general transmission faults): Range sensor issues, pressure control solenoids, clutch performance.
• P0730–P0736: Incorrect gear ratio/gear engagement problems indicating slipping or internal wear.
• P0715/P0720: Input/output speed sensor errors causing erratic shifting or limp mode.
• P0740/P0741: Torque converter clutch performance/solenoid faults tied to shudder or cruising RPM flare.
• P0796/P0776: Pressure control or shift solenoid performance issues.
• P0841/P0871: Line pressure/pressure sensor range-performance faults.
• Manufacturer-specific P17xx series (often CVT-related): May indicate CVT judder, belt/variator control, or calibration issues.

Codes don’t replace diagnosis; they narrow the search. Freeze‑frame data (vehicle speed, load, temperature when the fault set) helps reproduce the issue during a road test.

Check the Transmission Fluid (Safely)

Fluid condition is a quick health check—and the wrong fluid can cause problems by itself. Use only Honda‑spec fluids: ATF DW‑1 for conventional automatics, HCF‑2 for CVTs (hybrids use e‑CVT fluid per the manual). Procedures vary by year and transmission; consult your owner’s manual or a service guide for exact steps and temperatures.

1. Warm the car with a short drive on level ground. Follow the manual for whether to check with engine idling or off (older Hondas often specify engine off after a brief wait; many CVTs have no dipstick and require a level check at a set temperature).
2. Check level: Too low can cause slipping and flare; overfilled can foam and overheat.
3. Check color and smell: Healthy ATF is pink/red and slightly sweet; CVT fluid is light amber. Dark/brown, burnt odors, or visible metal sparkles are red flags.
4. Look for leaks around cooler lines at the radiator, axle seals, pan/fill plugs, and the bellhousing.

If fluid is degraded but the transmission still drives, a drain‑and‑fill (not a power flush) using the correct Honda fluid can improve operation. Severe contamination with metal debris usually points to internal wear and the need for further repair.

Road Test: Simple Checks You Can Do

A careful, controlled drive can reveal patterns that point to specific faults. Choose a safe route and avoid aggressive maneuvers if shifting feels abnormal.

1. Engagement test: From a full stop, shift from Park to Drive and Reverse. A healthy unit engages within about one second without a hard bang.
2. Acceleration: Moderate throttle from 0–40 mph. Watch for RPM flares (slip) or harsh bangs (pressure control/solenoid issues).
3. Low‑speed creep: In a CVT, feel for shuddering when easing off the brake; a light judder often improves temporarily after fresh CVT fluid.
4. Highway cruise: Hold steady speed; unexpected RPM changes or repeated hunting for gears suggest internal or control issues.
5. Manual mode (if equipped): Commanded up/downshifts should occur promptly and smoothly; significant delay or refusal may indicate faults.

Document exactly when symptoms occur—speed, engine load, temperature—so a technician can reproduce the issue and target diagnostics.

Model-Year Nuances That Matter

The Accord has used several transmissions, and known patterns can guide your expectations and troubleshooting.

• Late 1990s–mid‑2000s 4/5‑speed automatics: Some models were prone to premature wear and torque converter issues; harsh shifts, slipping, and a flashing “D” are common signs. Honda issued campaigns and updates in that era to address overheating in certain gears.
• 2008–2012 (5‑speed automatics): Generally improved reliability; occasional torque converter clutch shudder or pressure control solenoid issues respond to fluid service or solenoid repair.
• 2013–2017: 4‑cylinders use a CVT; low‑speed judder and calibration updates are common service items. V6 models use a 6‑speed automatic; some experience harsh 2–3 shifts or converter shudder that may be improved with software updates and fluid.
• 2018–present: 1.5T uses a CVT; 2.0T uses a 10‑speed automatic; Hybrids use an e‑CVT power‑split system. Early 10‑speed units had calibration updates for shift quality; CVTs can judder if fluid is old or incorrect. The hybrid e‑CVT is typically robust, with issues more often related to software or engine side.

Generation‑specific service bulletins and software updates are common; checking for outstanding updates can resolve drivability complaints without major repairs.

What to Try Before Replacement

Not every transmission complaint means a rebuild. These steps are often effective, especially if caught early and no severe metal contamination is present.

• Drain‑and‑fill with genuine fluid (ATF DW‑1 or HCF‑2 as applicable); avoid power flushing, which can dislodge debris.
• Update TCM/PCM software and perform adaptive relearn procedures after service.
• Inspect/replace transmission and engine mounts that can mimic harsh shifts and clunks.
• Test/replace pressure control and shift solenoids if codes and line pressure data point there.
• Correct cooling issues (blocked coolers, kinked lines) that can cause overheating.

If symptoms persist or fluid shows heavy metallic debris, internal wear is likely and further teardown or replacement becomes the practical path.

Repair and Cost Expectations

Costs vary by transmission type, mileage, and region. Planning ahead helps you decide between repair, rebuild, or replacement.

• Fluid service (drain‑and‑fill, filter/screen where applicable): roughly $120–$300 at a shop using Honda‑spec fluid.
• External sensors/solenoids and minor leaks: typically $200–$800 depending on parts and access.
• Torque converter replacement (traditional automatics): can run $1,000–$2,500 including labor.
• Full rebuild or reman automatic (5/6/10‑speed): often $3,000–$6,000+ with warranty.
• CVT replacement: commonly $4,000–$7,000+; many shops replace rather than rebuild.
• Used (salvage) units: lower upfront ($1,500–$3,500 plus labor) but higher risk; insist on mileage proof and some warranty.

Ask for a written estimate, warranty terms, and what parts are new vs. remanufactured. For newer cars, check powertrain warranty and goodwill support if you’re near coverage limits.

When It’s Not the Transmission

Several non-transmission problems can mimic transmission failure. Ruling these out can save significant money.

• Engine misfires or turbo boost issues (on 1.5T/2.0T) that cause surging mistaken for slipping.
• Dirty throttle body or faulty MAF/MAP sensors causing erratic shifts via incorrect load data.
• Failing wheel bearings or tires causing humming/whine that tracks with speed.
• Brake drag or ABS/VSA faults that feel like shudder or resistance.
• Worn engine/trans mounts causing clunks or lurches on engagement.
• Outdated PCM/TCM software producing shift quality complaints.

A thorough drivability check—including ignition, fuel, and ABS/VSA systems—helps avoid misdiagnosis.

What Mechanics Will Do During Diagnosis

A professional evaluation adds tests and data you can’t easily get at home. Knowing what to expect helps you assess the quality of the diagnosis.

1. Verify concern and pull full system codes (engine, transmission, ABS/VSA) with freeze‑frame data.
2. Check fluid level/condition and look for external leaks or connector contamination.
3. Compare live data: input/output speeds, commanded vs. actual gear, line pressure, slip speed.
4. Apply service bulletins/software updates and perform adaptation resets as needed.
5. Pressure tests and, for non‑CVT units, targeted hydraulic/solenoid tests; CVTs are tested via data and road evaluation.
6. Inspect mounts, driveline, and cooling circuits; on severe cases, inspect the pan/magnet for metal.

A good shop will explain findings, show data or fluid samples, and outline repair options with pros and cons.

Summary

Suspect a bad Accord transmission if you notice slipping, delayed or harsh shifts, CVT judder, unusual noises, burnt/dirty fluid, leaks, or warning lights. Confirm with a scan for transmission codes, a proper fluid check using Honda‑spec fluids, and a careful road test. Address basics first—fluid service, software updates, mounts, and solenoids—before considering costly replacements. Model‑year differences matter: CVTs (2013+ 4‑cyl) often respond to fluid and calibration updates; older 4/5‑speed automatics have known wear patterns; newer 10‑speed and hybrid systems have their own diagnostics. Early, accurate diagnosis can prevent further damage and lower repair costs.

What Honda Accords have transmission problems?

The 2023 Honda Accord Hybrid was recalled because of transmission problems that the manufacturer said could cause the engine to lose power during vehicle operation. Later models have also had transmission issues.

How do I know my transmission is about to go out?

Several signs can indicate an impending transmission failure. These include slipping gears, rough or delayed shifting, unusual noises like grinding or whining, a burning smell, and leaking transmission fluid. Additionally, a check engine light, especially if related to transmission codes, can be a sign of trouble. 
Here’s a more detailed breakdown:

• Slipping gears: If your vehicle seems to shift gears on its own, or if you experience a delay in acceleration when shifting, it could indicate a slipping transmission, according to Ray Price Honda. 
• Rough or delayed shifting: You might feel a noticeable jerk or hesitation when the transmission shifts gears, or notice a delay in the gear change, says Auto Transmissions R Us. 
• Unusual noises: Grinding, whining, or humming noises, especially during gear changes, can point to internal transmission problems like worn gears or bearings, according to Hogan & Sons. 
• Burning smell: A burning smell, particularly like burnt rubber, often indicates overheating or low transmission fluid, which can be a sign of a failing transmission, notes Lenfer Auto. 
• Leaking transmission fluid: Transmission fluid is typically red and sweet-smelling. If you notice leaks, it could indicate a crack or other issue causing the fluid to escape, notes Smart Toyota. 
• Check Engine Light: While not exclusive to the transmission, a check engine light, especially if accompanied by other symptoms, could be related to transmission issues. 

It’s important to address these symptoms promptly, as early detection can prevent more extensive and costly repairs. If you experience any of these signs, it’s best to have your vehicle inspected by a qualified mechanic as soon as possible, advises Guardian Transmission Repair.

How do you know if your transmission is going out in a Honda Accord?

Even if your car is responsive to gear changes, shifting may become more difficult. Your car might start having unexpected power surges when moving up a gear, making it feel like your car is being yanked forward by a cord. You could also hear grinding sounds during gear changes if your transmission is in trouble.

What year do Hondas have bad transmissions?

Honda transmissions have had issues across various model years, with notable problems in certain automatic transmissions from 1998-2005, particularly the V6 models due to poor lubrication and cooling. CVTs in models like the Honda Civic (1999-2004) and CR-V (2016-2020) also saw issues with belt durability and premature failure. More recent models, such as some Pilots (2003, 2005, 2009, etc.) and Accords (2018-2023), also reported problems like slipping, harsh shifts, and jerking. 
Late 1990s to Early 2000s Automatic Transmissions (1998-2005) 

• Issue: A widespread problem in automatic transmissions, especially those paired with V6 engines. The transmission was often designed for a 4-cylinder engine, and the extra torque of the V6 caused excessive stress. 
• Specific Symptoms: Rough shifting, second gear failing, and complete transmission failure. 
• Contributing Factors: Insufficient cooling and poor lubrication of the second gear were identified as contributing factors. 

This video explains why Honda transmissions fail and shows the components involved: 1mspeedkar99YouTube · Jun 10, 2024
Continuously Variable Transmissions (CVTs)

• Honda Civic (1999-2004 and 2014-2018): . Opens in new tabEarly CVTs were known to be unreliable. Some 2014–2018 Civic models also experienced shuddering and surging, especially during light acceleration. 
• Honda HR-V (2016-2020): . Opens in new tabA service bulletin was issued for the primary belt’s durability, which could lead to failures due to a software issue. 

More Recent Models 

• Honda Pilot: Specific issues have been noted in 2003, 2005, 2009, 2011, 2013, 2016, 2017, and 2019 models. Problems included hard shifting, slipping, and struggling to get to freeway speeds.
• Honda Accord: Some issues were reported for the 2018–2023 models, including slipping, jerking, and failure to shift properly.
• General 2018–2023 Models: Reports from this period mentioned issues like transmission shuddering, lurching, slipping, and a complete failure to engage.

You can watch this video to learn about the transmission issues in Honda vehicles from 2018 to 2023: 51sLemon Law AssistYouTube · Apr 18, 2023
What to Do

• Service Updates: Honda has released software updates and service bulletins to address many of these issues. 
• Professional Diagnosis: If you experience symptoms like hard shifting, slipping, or shuddering, it’s vital to have a professional diagnose the transmission’s problem.