Diagnose transmission water contamination and hold your shop accountable when mistakes happen.
Based on: The Dealership Put An Engine In This Durango, And Now The Transmission Has Issues! by Royalty Auto Service
▶ Watch the source video on YouTube
Have you ever picked up your car from a shop and known something was wrong — but couldn't put your finger on what they did or didn't do? That nagging feeling that something was missed, something was reassembled wrong, and now you're left holding the bill for someone else's mistake? You're not alone, and the pros at Royalty Auto Service have seen it happen more times than they can count.
This 2018 Dodge Durango RT came in with a transmission that wouldn't shift properly. What they found inside was a milky, water-saturated mess where clean fluid should have been. No flood damage. No coolant leak. Just one misplaced vent tube — a tube that was left hanging down after a dealership pulled the transmission to replace a rear main seal and swap the engine. That tube ended up sitting directly under the AC evaporator drain, and condensation quietly poured into the transmission for weeks. A mistake that cost thousands of dollars in damage, all from a single overlooked reconnection.
The good news? The dealership owned up to it. They sent a brand new Chrysler transmission and paid Royalty Auto Service labor to install it. The client got taken care of. That's how it should work — and knowing how to identify mistakes like this, and how to navigate the conversation with your shop, can save you enormous stress and money.
Royalty Auto Service has built a reputation for telling it straight — the good, the bad, and the ugly. When they walk through a diagnosis like this on camera, you're getting real-world knowledge from technicians who work on these vehicles every day. They know what a properly routed transmission vent looks like. They know the difference between a vehicle that's been sunk in water and one that's been damaged by a reassembly error. And they know how to have the accountability conversation with a shop in a way that gets results.
This checklist distills everything from that video into a clear, step-by-step guide you can use right now. Whether you've got a transmission acting up after recent shop work, you suspect water contamination in your fluid, or you just want to know how to advocate for yourself when a shop makes a mistake, this PDF gives you the exact process Royalty Auto Service used — from initial diagnosis to fluid inspection to getting the repair covered at no cost to the client. Print it out, keep it in your glove box, and never feel helpless in a shop conversation again.
Every checklist item comes with actionable notes to guide you — things like "Don't forget to do this before you start," "Avoid this common mistake," or "Set a reminder for 30 days out." Nothing vague, just clear next steps.
+ 10 more action items inside...
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