Help My thrust bearing failed why??

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stang514 - 12 Jan 2006 20:10 GMT

This is a small block Ford. I'm running a AOD-E tranny. The engine is about
4 months old. Could there be a issue with the tranny? The tranny wasn't
changed but the engine was completey new. The bearing failed on the rear
side. The clearances on the crank were all check and double checked. Was
there to little play between the converter and flex plate? There was not
any bind the converted would move freely in the bolt holes in the flex
plate. ( back and forth)
Thanks

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Backyard Mechanic - 13 Jan 2006 01:44 GMT

> This is a small block Ford. I'm running a AOD-E tranny. The engine is
> about 4 months old. Could there be a issue with the tranny? The tranny
[quoted text clipped - 4 lines]
> bolt holes in the flex plate. ( back and forth)
> Thanks

Stumper!

That last remark shows that there shouldnt be an trans input shaft binding
causing it.

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Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Jim Warman - 13 Jan 2006 05:08 GMT

Check the transmission cooler lines.... if there is a restriction (pinched
in the R&R process or whatever), the converter can either balloon or be
forced forward enough to give grief....

>> This is a small block Ford. I'm running a AOD-E tranny. The engine is
>> about 4 months old. Could there be a issue with the tranny? The tranny
[quoted text clipped - 9 lines]
> That last remark shows that there shouldnt be an trans input shaft binding
> causing it.

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Backyard Mechanic - 13 Jan 2006 05:19 GMT

> Check the transmission cooler lines.... if there is a restriction
> (pinched in the R&R process or whatever), the converter can either
> balloon or be forced forward enough to give grief....

Hah!

Warman to the reskyew!

Only thing I could think of was a bent rod... but that shouldnt destroy it
taht fast.

Signature

Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Bill - 13 Jan 2006 17:52 GMT

One of the things that can cause a thrust bearing failure is improper
assembly. When the thrust bearing main cap is installed, it needs to be
seated properly and crankshaft end play needs to be checked. (I like to see
about .006) I do it with a dial indicator, but I know guys who use feeler
gauges with no problems. I had to flat plate a set of main bearings one time
to get the clearance I wanted. If the main cap was installed with
insufficient clearance, that could very well wipe out the thrust bearing
since the transmission tends to push on the crankshaft.
Good Luck
Bill

> This is a small block Ford. I'm running a AOD-E tranny. The engine is
> about
[quoted text clipped - 5 lines]
> plate. ( back and forth)
> Thanks

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