ZF6 Breakage? - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 04-11-2011, 01:16 PM Thread Starter
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ZF6 Breakage?

The rear housing on my 6 spd transmission has broken for the second time now. Any ideas as to what might be causing this? The housing is breaking close to the transmission mount. I replaced the mount the last time because it was worn out. I hoped that was what was causing the problem but it just broke again. I haven't been towing anything or putting the truck under any stress either. Any ideas would be greatly appreciated. Thanks. Tim

Tim
2000 F250 7.3 PSD, 6spd, 4X4, Ext. Cab Pickup
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post #2 of 13 Old 04-11-2011, 05:32 PM Thread Starter
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I accidentally posted this in the wrong place. Anyone know how to move this over to the transmission problems section.

Tim
2000 F250 7.3 PSD, 6spd, 4X4, Ext. Cab Pickup
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post #3 of 13 Old 04-11-2011, 05:36 PM
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Can you take some pics? Maybe you didn't have your thrust clearance right when you put it together last time.

Allen
1999.5 F-350 7.3, six-speeed

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post #4 of 13 Old 04-12-2011, 01:45 PM Thread Starter
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Not sure what kind of pics you were wanting but here are a couple of the crack itself. It cracked in the same location last time. It is just in front of the transmission mount.
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Tim
2000 F250 7.3 PSD, 6spd, 4X4, Ext. Cab Pickup
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post #5 of 13 Old 04-12-2011, 02:36 PM
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I'd just have it welded back up. Don't know what your problem is.

Allen
1999.5 F-350 7.3, six-speeed

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post #6 of 13 Old 04-20-2011, 08:49 AM
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I'd check your engine mounts. The source might be further upstream of the transmission.
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post #7 of 13 Old 04-29-2011, 05:33 PM Thread Starter
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Well I've finally got the transmission out. The only problem I found was the pilot shaft bearing was worn out. Don't know if this may have been the cause or not. I really hope to find the problem before reinstalling it because it is not a cheap or easy fix. Thanks to everyone for their ideas.

Tim
2000 F250 7.3 PSD, 6spd, 4X4, Ext. Cab Pickup
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post #8 of 13 Old 04-29-2011, 06:42 PM
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I doubt that a piolot bearing would cause your problem since the crack is at the back of the case.

Allen
1999.5 F-350 7.3, six-speeed

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post #9 of 13 Old 05-03-2011, 04:56 PM
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I read a service bulletin somewhere that was saying, If you remove your trans with the Xfer case still attached it can lead to tailhousing failure....Just an FYI
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post #10 of 13 Old 05-03-2011, 04:57 PM
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By adding stress to the weaker tailhousing
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