Transmission Fluid Leak
Red or brown oily fluid under the front or middle of the car is usually transmission fluid from a pan gasket, seal or cooler line.
Can I drive it? Drive with care
Short trips are fine if you monitor the level. Running low can destroy a transmission quickly.
Typical repair cost
$150-$350 for a pan gasket, $200-$600 for a seal, $150-$500 for a cooler line.
General US estimates, not quotes. Prices vary by region, vehicle and shop.
Symptoms to Look For
These signs indicate you might be experiencing this issue
- Red fluid puddles under car
- Low transmission fluid level
- Transmission slipping or overheating
- Burnt smell from transmission
- Dashboard warning lights
Potential Causes
Most likely reasons for this problem, sorted by probability
Repair Solutions
Step-by-step instructions to diagnose and fix the problem
1Identify and Fix Transmission Leak
- 1
Clean transmission area with degreaser
- 2
Add UV dye to transmission fluid
- 3
Drive car briefly to circulate fluid
- 4
Use UV light to locate leak source
- 5
Replace gasket/seal or repair lines as needed
Need professional help?
Find a repair shop near you, or describe your exact symptoms to the AI mechanic
When to See a Mechanic
Do not wait if any of these apply
- A puddle appears again and again
- The fluid level keeps dropping
- Shifting problems or a burning smell
How to Prevent It
Simple habits that stop this problem coming back
- Look at the ground where you park
- Service the fluid on schedule
- Protect the pan and lines from road damage
Frequently Asked Questions
What colour is transmission fluid?
New fluid is usually bright red or pink. Brown or black and burnt-smelling means it is old or has overheated.
Can I just keep topping it up?
Only briefly. Repeated top-ups hide a leak that will eventually starve the transmission.
Related Issues
AI-generated and informational only. This is not a diagnosis of your specific vehicle and does not replace inspection by a qualified technician.