TH400 problems, see pics

[OregonGN]

I must admit, I don't I don't know alot about auto trans. I just had my TH400 gone through while I install my new motor. Could the wrong backing plate with four clutches caused this? Or the wrong clutch drum with the combination of backplate or number of clutches? I need to figure out before I go back to the shop and explain to them what happened.

<a href="http://s171.photobucket.com/albums/u305/provette32/?action=view&current=DSC00715.jpg" target="_blank"><img src="http://i171.photobucket.com/albums/u305/provette32/DSC00715.jpg" border="0" alt="Photobucket"></a>

 

[OregonGN]

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<a href="http://s171.photobucket.com/albums/u305/provette32/?action=view&current=DSC00719.jpg" target="_blank"><img src="http://i171.photobucket.com/albums/u305/provette32/DSC00719.jpg" border="0" alt="Photobucket"></a>

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<a href="http://s171.photobucket.com/albums/u305/provette32/?action=view&current=DSC00721.jpg" target="_blank"><img src="http://i171.photobucket.com/albums/u305/provette32/DSC00721.jpg" border="0" alt="Photobucket"></a>

<a href="http://s171.photobucket.com/albums/u305/provette32/?action=view&current=DSC00722.jpg" target="_blank"><img src="http://i171.photobucket.com/albums/u305/provette32/DSC00722.jpg" border="0" alt="Photobucket"></a>

 

[Gregaust]

How can that happen if the snap ring was in place?
Also the sprag arrow is the wrong way isn't it ????

 

[turbobitt]

It looks as if the drum was thrusting into the intermediate plate. The plate is relieved on one side to create clearance so this doesn't happen. I don't see the clearance in the pictures. Was it installed with the correct side towards the drum ? Another thing that could potential cause this is something missing, like a thrust washer, in the rear portion of the trans causing the drive tube to drop below its normal intended running area.

 

[turbobitt]

After looking at those pictures again, It definatly looks like the thick pressure plate isn't relieved on the drum side like it should be. Look closly at below picture.