ZF6 Breakage?

[tdarty77]

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

[tdarty77]

I accidentally posted this in the wrong place. Anyone know how to move this over to the transmission problems section.

[late_99_PSD]

Can you take some pics? Maybe you didn't have your thrust clearance right when you put it together last time.

[tdarty77]

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.

[late_99_PSD]

I'd just have it welded back up. Don't know what your problem is.

[wickettoby1]

I'd check your engine mounts. The source might be further upstream of the transmission.

[tdarty77]

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.

[late_99_PSD]

I doubt that a piolot bearing would cause your problem since the crack is at the back of the case.

[Young-SC-Owner]

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

[Young-SC-Owner]

By adding stress to the weaker tailhousing