8hp70x with or without pump.

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Nmr_fabrication
Posts: 15
Joined: 06 Jun 2025, 00:27

8hp70x with or without pump.

Post by Nmr_fabrication »

Anyone knows why some have a extra pump, and some not?

Got some gearboxes over here.
But discovered that the same boxes (8hp70x) has some difference.
One has a hole for the pump, and one does not have a (extra?) Pump.
Maybe it has something to do with the 4wd system?
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M4comp
Posts: 72
Joined: 26 Jun 2024, 03:21

Re: 8hp70x with or without pump.

Post by M4comp »

With no input rpm (engine off) the trans will not have pressure. That accumulator allows for park to be held off while the engine shuts off during stop/go traffic.
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