The APDTY 028438 transmission fluid dipstick tool is a measuring instrument designed to accurately check transmission oil levels on vehicles equipped with 42RLE, NAG1, 45RFE, or 62TE automatic transmissions. This tool replaces OE part numbers 8863B and 9336 and is compatible with select 2005-2019 Chrysler, Dodge, Jeep, Ram, and Volkswagen models that lack a factory-installed dipstick or require a specialized tool for transmission fluid service.
Key Takeaways
- APDTY 028438 is a measuring tool for checking transmission fluid level, not a permanent replacement dipstick
- Works with 42RLE, NAG1, 45RFE, and 62TE automatic transmissions
- Compatible with select 2005-2019 Chrysler, Dodge, Jeep, Ram, and Volkswagen models—verify your exact vehicle on the compatibility chart
- Replaces OE part numbers 8863B and 9336
- Essential for proper transmission fluid service and diagnosis on vehicles without factory dipsticks
Buy APDTY 028438 directly from APDTY
What Is the APDTY 028438 Transmission Dipstick Tool?
The APDTY 028438 is a specialized transmission fluid measuring tool designed for vehicles that do not come equipped with a permanent transmission dipstick. Many modern Chrysler, Dodge, Jeep, Ram, and Volkswagen vehicles with 42RLE, NAG1, 45RFE, or 62TE transmissions were built without a traditional dipstick in the transmission pan. Instead, these transmissions have a sealed fill tube and require a specific measuring tool to check fluid level during service.
This tool allows technicians and DIY mechanics to accurately measure transmission oil level during fluid changes, diagnostics, or routine maintenance. It is inserted temporarily into the transmission fill tube to verify proper fluid level, then removed after the measurement is complete. This is not a replacement dipstick that stays permanently installed in the vehicle—it is a service tool used during fluid service procedures.
Which Vehicles Use the APDTY 028438 Dipstick Tool?
The APDTY 028438 is designed for vehicles equipped with one of the following automatic transmissions: 42RLE, NAG1, 45RFE, or 62TE. The provided product data specifies broad compatibility ranges, but does not list every specific vehicle year, make, and model. According to the manufacturer's information, this tool is compatible with:
- Select 2005-2016 Chrysler models
- Select 2005-2019 Dodge models
- Select 2005-2018 Jeep models
- Select 2011-2015 Ram models
- Select 2009-2014 Volkswagen models
Important: The exact fitment for your specific vehicle year, make, and model must be verified using the live compatibility chart on the product page. Not all vehicles within these ranges will require this tool—only those equipped with the applicable transmission types listed above.
Why Do Some Transmissions Not Have a Dipstick?
Many modern automatic transmissions were designed as "sealed" or "fill-for-life" units to reduce maintenance touchpoints and meet tighter emissions and fuel economy standards. Manufacturers eliminated the traditional dipstick to prevent incorrect fluid additions by untrained owners and to reduce the risk of contamination entering the transmission through an open dipstick tube.
However, transmission fluid still degrades over time and requires periodic service. For vehicles without a factory dipstick, manufacturers provide a service procedure that includes using a special measuring tool—like the APDTY 028438—to verify proper fluid level after a drain-and-fill or fluid exchange. This tool is inserted into the fill tube opening, the fluid level is checked under specific conditions (usually with the transmission at operating temperature and the engine running), and then the tool is removed once the measurement is confirmed.
Specifications and OE Cross-Reference
| Specification | Details |
|---|---|
| APDTY Part Number | 028438 |
| Product Type | Transmission Fluid Measuring Tool (Dipstick) |
| Application | 42RLE, NAG1, 45RFE, 62TE Automatic Transmissions |
| Replaces OE Part Numbers | 8863B, 9336 |
| Vehicle Compatibility | Select 2005-2019 Chrysler, Dodge, Jeep, Ram, Volkswagen Models (see compatibility chart) |
| Installation Type | Temporary service tool (not permanently installed) |
| Condition | Brand New |
How to Use a Transmission Fluid Dipstick Measuring Tool
Using the APDTY 028438 requires following the correct service procedure for your specific transmission type. While exact procedures vary by vehicle and transmission, the general process includes the following steps:
- Warm the transmission: Drive the vehicle until the transmission reaches normal operating temperature (typically 160-180°F), as fluid level readings are only accurate at the correct temperature.
- Park on level ground: Ensure the vehicle is on a flat, level surface to get an accurate reading.
- Shift through gears: With the engine running and your foot on the brake, shift through all gear positions (P-R-N-D and back to P) to circulate fluid through the system.
- Locate the fill tube: The fill tube is typically located on the side or top of the transmission. Remove the fill plug or access cap.
- Insert the measuring tool: Insert the APDTY 028438 dipstick tool fully into the fill tube opening.
- Check the fluid level: Remove the tool and inspect the fluid level mark. The fluid should be within the specified range on the tool. If low, add the correct transmission fluid type in small increments and recheck.
- Remove the tool: Once the fluid level is verified, remove the measuring tool and reinstall the fill plug or cap.
Always consult your vehicle's service manual for the exact procedure, fluid type, capacity, and operating temperature specifications for your specific transmission. Incorrect fluid level—either too high or too low—can cause transmission damage, shifting problems, or overheating.
When Do You Need This Tool?
The APDTY 028438 transmission dipstick tool is essential for several service scenarios:
- Routine transmission fluid service: During scheduled drain-and-fill or fluid exchange services, this tool is required to verify proper fluid level after refilling.
- Transmission diagnostics: If you're experiencing shifting issues, slipping, or transmission warning lights, checking the fluid level is a critical first diagnostic step.
- After transmission repair or replacement: Any time the transmission is removed, rebuilt, or replaced, fluid level must be verified using the proper measuring tool.
- Leak diagnosis and repair: If you suspect a transmission fluid leak, you'll need this tool to accurately check the current fluid level and confirm proper level after topping off.
Without this tool, it is nearly impossible to accurately measure transmission fluid level on vehicles with sealed transmissions. Guessing or attempting to measure through the fill hole without the proper tool can result in overfilling or underfilling, both of which can cause serious transmission damage.
Frequently asked questions
Is the APDTY 028438 a permanent replacement dipstick?
No, the APDTY 028438 is a measuring tool used during service procedures to check transmission fluid level. It is inserted temporarily to verify fluid level, then removed. It is not designed to remain permanently installed in the vehicle.
Will this tool fit my Jeep or Dodge vehicle?
The APDTY 028438 is compatible with select 2005-2019 Dodge models and select 2005-2018 Jeep models equipped with 42RLE, NAG1, 45RFE, or 62TE transmissions. You must verify your specific vehicle year, make, and model on the live compatibility chart provided on the product page.
Can I check my transmission fluid level without this tool?
On vehicles designed without a factory dipstick, it is not possible to accurately check transmission fluid level without a proper measuring tool like the APDTY 028438. Attempting to guess or estimate fluid level can result in overfilling or underfilling, which can cause transmission damage.
What OE part numbers does this tool replace?
The APDTY 028438 replaces OE part numbers 8863B and 9336. These are the original equipment part numbers used by manufacturers for transmission fluid measuring tools on applicable vehicles.
The APDTY 028438 transmission fluid dipstick tool is an essential service tool for checking transmission oil level on select Chrysler, Dodge, Jeep, Ram, and Volkswagen vehicles equipped with 42RLE, NAG1, 45RFE, or 62TE automatic transmissions. This measuring tool replaces OE part numbers 8863B and 9336 and provides the only accurate method for verifying proper fluid level on vehicles without a factory-installed dipstick. Whether you're performing routine transmission service, diagnosing shifting problems, or topping off fluid after a leak repair, this tool is a must-have for any DIY mechanic or professional technician. Verify your vehicle compatibility using the live chart on the product page and ensure proper transmission maintenance with the correct measuring tool.