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Transmission Stop Leak

Transmission

Conditions transmission seals and gaskets to reduce or stop small fluid leaks without requiring seal replacement or removal.

Transmission Stop Leak is a bottle of additive designed to be poured into the transmission fluid to help stop minor seepage around seals and gaskets. It works by softening and swelling rubber seals to restore their grip and prevent weeping leaks. This is typically a one-time treatment for small leaks and is not a substitute for major transmission repairs.

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Typical part cost
$8–$20🔒
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Typical labor cost
$0–$0🔒
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DIY difficulty
1/10

⚠️ Owners Often Notice

If the Transmission Stop Leak is starting to fail, these are the signs owners most commonly report before it gets worse:

Small red or pink fluid drips under vehicle
Transmission fluid level slowly dropping
Visible seepage around transmission pan

Related Services

Services commonly performed on or around this part.

Add Transmission Stop Leak

No standard interval on file