Posted by pete 23 on December 07, 2009 at 18:38:33 from (173.87.147.73):
In Reply to: 7140 magnum posted by cs880 on December 07, 2009 at 08:57:32:
I did some looking in manual, however, I have been away from this system too long and just never did enough work on them to have it ingrained in me. We always did a 7 gauge hookup when testing transmission and master clutch pressures to try to isolate a problem. I will say though that the main pump does indeed provide the hydraulics for transmision after power steering. The other two pumps are for oil cooler, lubrication, and charging the main pump. As you say it works with sender disconnected I am at a loss as to just what takes place. I know that if you lose engine oil pressure the automatic shut down for the engine will come into play but can't relate to how the low regulated pressure would cause transmission to not drive. Getting too old for this I guess. Sorry about that.
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