'90 7.3 E4OD

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Dec 1, 2014 | 02:52 PM

Wild Ziggy

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From: Mason City, IA

'90 7.3 E4OD

This happened a while ago, but I'm finally able to hopefully start working on it. I haven't removed the trans yet, but I can remember hearing a grinding sound in park, and it wont engage any gears. The thing that baffled me, is the fluid looks and smells ok, not burnt or discolored. So when I get the truck back to me, I may have some diagnosing to do.

Anyway, I'm looking at rebuilding the E4OD that's in the truck. Is there anything specific I should look at? Any recommendations on parts to put in the rebuild? And is this something that an average mechanic can handle? I've r&r before, so I'm not terribly concerned about that part. Just the actual rebuilding itself.

Thanks in advance for the help.

Dec 1, 2014 | 02:56 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

I'll bet it's a 4x4. Grinding in park almost always means the transfer case has failed, not the transmission. Does it hold in park or will it roll?

Dec 1, 2014 | 03:12 PM

Wild Ziggy

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From: Mason City, IA

Yes its 4x4. To be honest I don't remember 100%. I'm pretty sure I have the parking brake engaged also as where its parked is slightly sloped.

I remember I was accelerating, not very quickly, when it just started to free-rev. After I had shut it off, I could restart the truck and get it to go forward a few feet, but that would be it.

Dec 1, 2014 | 06:47 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,697

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From: SE Florida

I think your problem is in the transfer case, not the transmission.

Dec 1, 2014 | 08:47 PM

Wild Ziggy

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From: Mason City, IA

Ok, thanks for your help. I hope to have the truck at my new place soon. If the t-case is the problem, how difficult is it to swap out? And can I just find one with the same numbers on it, or does it need to come from the same truck?