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It doesn't matter what you want to call it. If one is recreating the GOVT approved split system for the late A2's you need that part.
When you are figuring how to install it the Manual calls it the pressure differential switch.
When you go to order the part by NSN the GOVT calls it a proportioning valve.
If we can verify the HMMWV switch is the same, the only part left to find is the master cylinder mount and that could be made if absolutely had to be.![A toast to MV's :beer: :beer:](https://www.steelsoldiers.com/images/smilies/beerchug.gif)
When you are figuring how to install it the Manual calls it the pressure differential switch.
When you go to order the part by NSN the GOVT calls it a proportioning valve.
If we can verify the HMMWV switch is the same, the only part left to find is the master cylinder mount and that could be made if absolutely had to be.
![A toast to MV's :beer: :beer:](https://www.steelsoldiers.com/images/smilies/beerchug.gif)