Answer
Jul 29, 2025 - 05:11 PM
If the fluid was filled through a vent port or magnetic plug, there may be no immediate damage as long as it reached the transmission, but it could have bypassed critical pathways or led to overfilling. Some of these ports aren’t designed for fluid entry and may damage sensors or cause pressure issues, potentially violating manufacturer service procedures. Overfilling or introducing fluid into a sensor port can result in foaming, slipping, harsh shifting, or fluid blowout, and may eventually short out electrical components.
Here's what you can do:
- Use the correct procedure for your specific transmission — sealed transmissions may require the engine to be running, fluid warm, etc.
- Ask Jiffy Lube which plug they used and how much fluid they added.
- Take photos if you can — helpful for warranty or legal protection.
- Take it to a trusted mechanic or dealership.
- Have them inspect fluid level, check for leaks, and verify that no sensors were damaged.
FINAL VERDICT: If the fluid actually reached the transmission properly and no electronic components were damaged, you may be okay — but there’s risk. For peace of mind (and warranty protection), have the level and fill method checked by a pro.
Add New Comment