Automatic gearbox specialists
Is your gearbox leaking fluid?
Red, brown or dark oil under the middle of the car. Low automatic fluid is how Drive disappears. A leak does not seal itself.
- A red or brown puddle on the drive?
- Level dropping, and Drive is getting late?
- Pink milky fluid, not a clean red?
A gearbox fluid leak drops the level so packs cannot clamp. Delay, slip, then no Drive. Finding the leak is automatic work at Service4Service.
Milky pink fluid is coolant in the oil, usually a cooler. Stop. That is not a top-up job.
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What is a gearbox fluid leak?
Automatic transmission fluid is usually red or dark brown. A puddle under the middle or front of the car can be a gearbox fluid leak from a pan gasket, seal, cooler line or torque converter hub. Low fluid causes delayed Drive, slipping and overheating, so a leak should be traced and repaired promptly.
Automatic transmission fluid is usually red or dark brown. A puddle under the bellhousing, pan or cooler pipes is a gearbox fluid leak. Gearbox seals, a pan gasket, a cooler line or the torque converter hub can all weep.
Low level starves the gearbox oil pump. Then you get delayed Drive, slipping and overheating.
A diagnostic check includes a look at the level and the colour. If limp mode is already on, do not keep topping up and hoping. Ford and Volkswagen dual-clutch units leak from different places than a conventional pan. We will find it.
- Red, pink or dark brown fluid is typical of ATF
- Common leak points: pan gasket, shaft seals, cooler lines and the converter seal
- A low level damages clutch packs and the pump
- Topping up without fixing the leak only delays the problem
Driving on a leak will leave you with no Drive
Every mile on a falling level glazes the packs. A small weep becomes a stream when the oil is hot. Park it and call.
Leak symptoms people search
If any of these sound like your car, do not wait for it to fail on the road.
Red fluid under the car
Classic ATF. Confirm it is not PAS fluid.
Brown or burnt-smelling oil
Old ATF, and a leak on top of wear.
Pink and milky
Cooler leak into coolant. Stop.
Wet around the pan
Gasket or filter housing.
Wet cooler pipes
A pipe or radiator stack.
Level dropping, Drive late
The leak is already affecting the gearbox.
Where automatic fluid escapes
Pans, gearbox seals, selector shafts, cooler unions and converter seals. A transmission cooler in the radiator that fails internally may leave little on the floor and still wreck the oil.
We clean, run, and watch. A dye or a temperature test helps when the leak is shy.
Oil leaves the unit
The level falls.
Pressure falls with it
Delay and slip.
Packs glaze
Then no Drive. It only gets worse.
Leak work we do
We find whether the leak is a seal, a pan, a cooler or a converter, assess the oil that is left, and repair the automatic if the leak has already caused slip.
- Leak tracing, not a blind top-up
- Seal, pan and cooler repairs
- Fluid condition checks
- Collection when the level is already critical
Puddle on the drive, and Drive feels late?
That is not a bottle of ATF and a prayer. That is automatic gearbox repair. Call.
Why this work comes to Service4Service
- Automatic and dual-clutch work is core work, not a sideline
- Diagnosis before parts
- Collection when the car should not be driven
- 12 months or 12,000 miles on parts and labour
Guarantee and payment
Repairs are backed by a 12 month or 12,000 mile warranty on parts and labour. See Payment Options for ways to pay.
Often. Power steering can be red too. We will confirm.
As an emergency, once. If it keeps disappearing, you are masking a leak and risking the packs.
Age and heat. Brown and leaking is overdue a test.
They leak their own spec oil. Same idea: level matters.
No. Automatic leaks are the work.
If Drive is already late, no. Recover it.
Automatic transmission fluid is commonly red or pink when fresh and darkens to brown with age, while some specifications use other colours. Engine oil is typically amber to black, and power steering fluid can look similar, so the source needs checking.
Common leak points are the pan gasket, the front torque converter seal, the output or driveshaft seals, the selector shaft seal, cooler hoses and fittings, and the cooler itself. Tracing starts with cleaning the area and checking where fresh fluid appears.
A small seep is less urgent than a drip, but any leak lowers the fluid level over time. Low fluid can starve the pump and overheat clutch packs, so check the level and have the source traced instead of waiting for a warning light.
Related guides
Do not ignore red oil under an automatic
If the drive is stained or Drive is getting late, tell us. Leak diagnosis is work we do every day.
