Case 450 dozer TQ problems

[jsloniker]

We have a case 450 dozer that started leaking fluid from behind the flywheel, so we dropped the TQ and rebuilt it. All new seals and bushings front ot back on it. We reinstalled it this weekend and fired the dozer back up and it leaked just as bad as before.
My question is, is there a trick to reinstalling the TQ? Could we have done something to mess a seal up? The flex plate was kind of a buger to get bolted up, could we have damaged a seal messing with the flex plate. Also could there be something cracked inside the TQ that would cause it to leak from the front end of the TQ? This is not a small leak I would say it will leak a gallon out in 15 to 20 minutes.
Thanks in advance for the help.

 

[Penn]

Someone on here recently had the same problem on his 450B and it turned out there was a hairline in the housing.
P
Torque leak

 

[roney7]

I had the same problem with mine. I found a hair line crack in it. If you have it out you can test it with air pressure. I filled the outer houseing with water put about 25 lbs of air to it and found the crack. Plug all the oil ports and install a quick disconnect to one for air. Be careful when you take the air off it will blow fluid out the dis-connect . I got fluid all over me and my truck .You can fill up slowly and see where the leak is . Might not even need to put water in the outer housing.