If the fluid is red, it is automatic transmission fluid, and the transmission's oil pump seal is most likely at fault. Always check the transmission fluid's color because ATF will turn brown from heat and oxidation. Rear main seal leaks are common, if the color of the fluid is brown, it's most likely engine oil leaking past the rear main seal.
What leaks out of rear main seal?
The most common leaks that can masquerade as a rear main seal leak is a valve cover gasket leak, intake manifold gasket leak or a distributor gasket leak. An oil pan gasket is also usually much less expensive to replace so it's important to check for leaks in your oil pan gasket before you jump to any conclusions.
Can a bad rear main seal cause transmission problems?
Inspect for Damage Caused by Rear Main Leak
Damage to an automatic transmission isn't likely, but a leaking rear main seal on a stick-shift car can cause the clutch to slip and ultimately damage the clutch and pressure plate.
How do you know if your rear main seal is leaking?
Related Question Does a rear main seal leak oil or transmission fluid?
Where does rear main seal leak from?
An oil leak from the main seal, also known as the rear crankshaft seal, will usually drip from where the transmission connects to the engine, though it may show up elsewhere, such as on the oil pan.
How do I stop my rear main oil seal from leaking?
The rear main seal is subject to both high oil pressure since it is right by the rear main bearing as well as the spinning crankshaft which is constantly wearing on the inside of the seal. No matter how often you change your oil, eventually the spinning metal crankshaft will wear down the seal enough to cause a leak.
How do you check a rear main seal?
Why is my new rear main seal leaking?
Is it the rear main seal that is leaking? On most engines, oil leaks can occur above and below the rear main seal. It could be a leaking oil pressure sensor, oil pan gasket or galley plug near the seal that causes oil to come from the bell housing. Adding dye to the oil can help reveal where the oil is coming from.
Does a rear main seal leak when parked?
If your car seems to be losing oil quickly but you do not see visible leakage when your car is parked, your rear main seal could be in the early stages of failure. Make sure to check the cover gasket and valley pan for leaks. These much simpler repairs can sometimes be misdiagnosed as a rear main seal leak.
How long does it take for Blue Devil rear main sealer to work?
Just be patient and give it 30-45 days to work.
Can an oil pan leak cause low oil pressure?
#5) Oil Leak
Finally, an oil leak can cause low oil pressure in your car. Depending on the specific type of car that you drive, it may hold anywhere from 5 to 8 quarts of oil. You can pull the dipstick to see if it's low on oil.