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8hp70x with or without pump.

Posted: 10 Jul 2025, 13:55
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?

Re: 8hp70x with or without pump.

Posted: 10 Jul 2025, 18:52
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.