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Automotive RepairDiagnostics & Troubleshooting4HighDIY Mechanic / Hobbyist$ implied

After a transmission replacement, the user cannot fill the full 9.9L capacity through the fill bung; only 3L fits, and they fear damaging the transmission by running it dry to circulate fluid.

No affordable, single-use tool exists for DIYers to safely prime and fill a dry automatic transmission without running the engine, risking damage.

Severity

4High

Willingness to Pay

implied

Added

May 16, 2026

Workarounds Described

filling via rubber hose into fill bung only gets 3L in
considering running engine to let pump pull fluid in but fears running dry
prefers to avoid buying a pressure filler for a one-time job

App Concept

TransFill Prime

TransFill Prime is a manually operated pressure filler that lets DIY mechanics fill a dry transmission to full capacity without starting the engine. A hand pump and reservoir connect to the fill bung, pushing fluid in while a built-in pressure gauge ensures safe filling. No power tools or expensive shop equipment needed.

Key Features

Hand-operated pump with 2L reservoir
Pressure gauge to monitor fill rate
Universal adapter for common fill bungs
Bleed valve to release air pockets
Lightweight, portable design

Target Users: DIY car enthusiasts and home mechanics working on automatic transmission replacements in their personal vehicles

Revenue Model: $39.99 one-time purchase; $9.99 for replacement seals and adapter kit

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