D7E Trans pump

Don, Black oil is most likely from the engine oil blowing past the rear crank seal, if you had burnt oil you would have torque over heating and you could smell the burnt oil. It would be brown not black.
I think you should check the trans pump suction line for a leak, pump may sound like it has marbles running around in it.
You replaced a trans pump??? was the back plate milled out behind the drive gear???
If so check the new pump, it may be ruined too if the drive gear has worn splines. Worn splines will force the drive gear on the new pump back into the back housing.
Come on back with what you find.
Later Bob

I don't hear any noise from the pump at all. I'm not sure I understand about the back plate being milled, I just pulled the old one off and put the new one back on. I will tell you the reason I had to replace it was that I had the floor plate up and I decided to check that filter for the first time since I've owned it. Well, it was full of trash and I cleaned the housing out completely and put a new filter in it, but I didn't put oil back in it and the pump ran dry and locked up.
I've got the belly pan off now so I'll check the suction line. Surely I didn't leave one of those blue rags stuffed into the suction line when I changed that pump...

d9gdon give me call i mite have the answer to your proble.we have two D7 E &F we have had simiar proble.you can call me at 916 929 7773 I im in California.Jason

It could be the seals that feed the release pistons in the bevel gear steer clutch compartment, or leakage around the pistons as well. You need to get a pressure gauge and check at the manifolds under the fuel tank. If pressure bleeds off on release then you have a leak.

Thanks Jason, I'll do that.

Bob, are you talking about the big teflon seals? Are you saying I'll have something like 275 lbs pressure when operating and if my pressure drops when I release the clutch(es), that would indicate bad teflon seals in the pistons?

I still haven't had time to check the supply side of the pump.

I think Bob means the teflon rings on the inner steering clutch flanges, inside the bearing cages. They go out if you lose the bevelgear shaft bearings. I think you have an air leak caused by taking the line off the old pump and moving it. A rag in the line wouldn't clear up by bleeding air. Steering levers falling back is strange, only thing they work against are the springs in the valve.
Later Bob

Thanks bob, I'm going to look into it first thing tomorrow. It quit again today and was really hard to get primed again. I'm preoccupied with a 627 apron cylinder with 3 updates on the cylinder kit and 2 strikes against the dealer.

Thanks for the help on this, the service manual only goes so far...

Jason, I tried to call but no answer. Thanks in advance if you can share it on here.

I found it. All it turned out to be was the suction line on the bottom of the pump had come loose and was sucking air. It works as good as new. Thanks for all the help.