How do I know if my Subaru transmission is bad?
Watch for slipping gears, delayed or hard shifting, unusual noises, fluid leaks, a burnt smell, or warning lights on the dashboard. If you notice any of these signs, have your Subaru inspected promptly by a trained technician.
Subaru uses a mix of traditional automatics and the Lineartronic continuously variable transmission (CVT) in many models. Transmission problems can stem from fluid conditions, wear, overheating, or internal component failure, and symptoms can vary between CVTs and conventional automatics. This guide outlines the main warning signs, how to diagnose them, and what steps to take to protect your vehicle and budget.
Key signs your Subaru transmission may be failing
Common symptoms fall into categories related to shifting behavior, unusual noises, fluid health, and dashboard alerts. Recognizing these early can help you avoid more extensive damage.
- Slipping gears or the engine revving higher than expected without a corresponding increase in vehicle speed
- Delayed engagement or hard, clunky shifts when selecting Drive, Reverse, or Park
- Unusual noises such as whining, clunking, grinding, or chirping coming from the transmission area
- Transmission fluid leaks or a consistently low fluid level; fluid that is dark, gritty, or has a burnt smell
- Burning odor around the transmission or under the hood, especially after heavy use or overheating
- Dashboard warning lights (e.g., Check Engine light, transmission warning indicators, or transmission-specific codes)
- Vehicle goes into limp mode or fails to move in any gear despite pressing the accelerator
- Shuddering, bucking, or surging during acceleration or at low speeds (more common with CVTs)
- Persistent transmission overheating indicators or symptoms suggesting cooling system issues
If you notice any of these signs, schedule a diagnostic check with a Subaru dealer or a shop experienced with CVTs and automatics as soon as possible to prevent further damage.
How to diagnose and what to do next
Because transmission issues can have multiple causes, a structured diagnostic approach helps distinguish fluid problems from mechanical failures and electronic sensor issues.
- Check transmission fluid level and condition when applicable (some CVT models use a dipstick your manual explains how to check); look for proper color, cleanliness, and absence of burnt odors
- Inspect for leaks beneath the vehicle and identify the source; even small leaks can lead to damage if left unaddressed
- Scan for trouble codes with an OBD-II scanner or at a shop; note any transmission-related codes (common examples include P0700 and related P07xx series)
- Take note of when the issue occurs (cold vs. hot engine, speed, load, gear selection) and whether it’s tied to acceleration, idling, or gear engagement
- Consult a professional for a thorough inspection of internal components, fluid pressure, and, for CVTs, belt/pulley wear or torque converter concerns
Because many Subaru CVTs require specialized tools, fluids, and procedures, professional diagnosis is essential. Early inspection can help avoid costly repairs or premature replacement.
Subaru-specific considerations and maintenance tips
Subaru’s lineup features many models with the Lineartronic CVT, which behaves differently from traditional automatics. Fluids, maintenance intervals, and recalls or service bulletins related to transmissions vary by model year. Always check the owner’s manual and consult a Subaru-certified technician for model-specific guidance and to verify any active recalls.
Maintenance tips to extend transmission life
Here are practical steps to minimize transmission wear and catch problems early:
- Use only the transmission fluid specified by Subaru for your model and have changes performed by a trained technician; avoid aftermarket additives
- Adhere to the manufacturer’s service intervals for CVT fluid changes and related inspections
- Keep cooling systems and radiators in good condition to prevent overheating, which can stress CVTs and automatics
- Avoid aggressive starts, hard launches, and excessive towing beyond rated capacity
- Address leaks promptly to prevent fluid loss and contamination of the transmission
Regular maintenance and timely attention to signs of trouble can significantly reduce the risk of sudden failures and costly repairs.
Costs, options, and warranties
Repair costs and strategies vary by model, year, and local labor rates. Here is a general overview of common paths and what to expect.
Typical repair and replacement options include:
- Repairing or rebuilding the existing unit when feasible, which can be less expensive than a full replacement but depends on damage
- Replacing with a remanufactured or new transmission from the dealer or an aftermarket supplier
- Using a used or salvaged transmission, which carries higher uncertainty about remaining life
- Exploring any applicable recalls, service bulletins, or extended warranties that may cover specific model years or issues
Cost estimates for CVT-related work can range widely, from a few thousand dollars for minor repairs to several thousand dollars for full replacement, depending on the model, availability of parts, and labor. Always obtain a detailed diagnostic report and multiple quotations before proceeding.
Summary
If you notice signs such as slipping, delayed or hard shifting, strange noises, fluid leaks, or warning lights, plan a professional inspection sooner rather than later. Subarus with CVTs require specialized diagnostics and fluids, so rely on a dealer or a shop with CVT expertise. Early diagnosis and timely maintenance can save money and extend the life of your transmission.
What Subaru models have transmission problems?
While Subaru has improved its CVTs over the years, certain models are more prone to failures:
- 2010–2013 Subaru Outback & Legacy (First-generation Lineartronic CVT)
- 2013–2017 Subaru Crosstrek (Early FB20 engine models)
- 2014–2018 Subaru Forester (FB25 engine models)
- 2019+ Subaru Ascent (Higher torque load on the CVT)
What happens right before your transmission goes out?
You can tell your transmission is about to go out by listening for unusual noises like grinding or whining, and by observing issues like slipping gears, delayed or harsh shifting, or hesitation when accelerating. Other signs include a burning smell, transmission fluid leaks, and the illumination of the "Check Engine" light.
Symptoms of a failing transmission
- Unusual sounds: Listen for grinding, whining, clunking, or humming noises. A loud or rough sound when shifting gears is a major warning sign.
- Shifting problems:
- Slipping: Your car may feel like it's shifting gears on its own, especially when accelerating.
- Hesitation or delay: There may be a noticeable delay when shifting into gear or when the engine revs before a gear change.
- Rough or hard shifts: Shifts may feel jerky or harsh instead of smooth.
- Fluid issues:
- Leaking fluid: A red or brown puddle under your car could indicate a transmission fluid leak.
- Burning smell: A sweet, burning smell often points to overheating transmission fluid.
- Warning lights: The "Check Engine" light or a dedicated transmission warning light can come on to indicate a problem with the transmission.
- Performance issues:
- The vehicle may be slow to accelerate or feel sluggish.
- The car may not move when you put it in gear and press the gas pedal.
What to do
If you experience any of these symptoms, have your vehicle inspected by a professional mechanic as soon as possible. Driving with a failing transmission can lead to more severe and costly damage.
How often do Subaru transmissions fail?
10 years 100,000 miles which uh is uncommon for what we used to know about Subarus. If you service the fluid in your CVD. Transmission in your Subaru.
How to tell if a Subaru transmission is bad?
Here are seven signs that it's time for transmission service.
- Delayed Gear Engagement.
- Unusual Noises.
- Burning Smell.
- Leaking Fluid.
- Slipping Gears.
- Dashboard Warning Lights.
- Grinding or Shaking.
- Get Subaru Transmission service in Ocala, FL.
