If a transmission leak is suspected, the auto technician will perform an inspection on the transmission to reveal its source. Once the suspected part or parts have been resealed or replaced, the transmission will be inspected again to make sure the leak has stopped.
How is a transmission leak fixed?
Fixing a transmission seal or gasket can be easy, or it can require disassembly of several components or even removing the transmission entirely. This can involve lowering the transmission, removing the transfer case or removing the exhaust to access the driveshaft. If significant fluid loss is noted, a transmission fluid drain and fill is recommended.
RepairPal recommendations for transmission leaks
We recommend against any products that claim to stop transmission fluid leaks. These products can create a blockage in fluid passages and clog transmission fluid filters. Either of these outcomes can lead to internal damage. You're better off getting the leak repaired the right way.
What to look out for with transmission leaks
There are different types of transmission fluids, and they aren't typically interchangeable. Check your owner's manual to find the correct fluid for your transmission. If you add the wrong kind of transmission fluid, the resulting damage could be severe.
Can I inspect or fix a transmission leak myself?
Finding and diagnosing transmission leaks can be tricky, but it's something most people can do on their own. Repairing the leak will likely require advanced knowledge and specialty tools. If fixing the leak requires taking apart any or all of the transmission, you should let a mechanic handle it.
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