Park release tool for ZF 9HP Transmission
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Tool to manually place the ZF 9HP transmission in neutral when the vehicle will not start.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Automotive
- Licencja
- Creative Commons — Attribution — Noncommercial
This is a print-in-place tool allowing you to manually place in neutral the ZF 9HP transmission (found on the G2 Honda Ridgeline and on some years of the Honda Pilot as well as other makes) when the vehicle will not start. The ZF 9HP transmission in (some) vehicles cannot be placed into neutral if the engine is not running. Honda sells a costly OEM tool similar in function to this (essentially for tow truck drivers) to manually place the transmission in neutral so the vehicle can be moved.
This tool is intended for moving the vehicle a short distance, not necessarily for towing. It is a new design with limited testing and will likely see future updates.
Additional tools for using:
- Lisle 20400 shock socket or similar (required)
- 8mm or 5/16" allen wrench / hex key of sufficient length (required)
- ½" wrench or socket and ratchet (recommended)
Thanks to BeshMoHandes for help in designing this!
To install:
1) Place the device over the transmission mounting location until fully seated and flat, with the arm pointed right as shown (note the drain plug with the hex hole to the right and slightly up from the mount):


2) Insert the 1/2" OD shock socket (purchased separately) into place and fully seat over the transmission pin, paying attention to the pin's oblong shape and matching it with the slot in the shock socket (oriented from 5:00 to 11:00):

3: Manually rotate the arm counter-clockwise as far as possible (about 1/6 turn) which will position the open hole directly over the drain plug. Insert the hex wrench (8mm or 5/16" will work) through the hole and down until fully seated in the hex recess in the drain plug, then release the arm. It will hold the transmission's lock release pin in the neutral position:

The vehicle should now be in neutral and can be moved.
Printed in PETG with 0.4mm nozzle.
You may need to remove the elephant's foot (if any) from the inside bottom for the base of the tool to slide onto the mount. The fit is tight to the mount to reduce the chance of it slipping off.
Tolerance in the model for the internal rotating “spool” surfaces is 0.15mm.
Supports are required, as shown painted on here:
