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LEAKING TH400
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ElkyRoss
New User
| Posts: 1
| Joined: 08/09
Posted: 08/18/09
03:20 PM
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Need some help before I loose what little of my mind I have left. I have a 68 El Camino 396 th400 tranny. I have had the tranny rebuilt and the rear housing seal replaced twice. Doesn't leak at the shop, but as soon as I get her home and parked, yep, leaking again. Any help is greatly appreciated. 
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mpayne
Administrator
| Posts: 632
| Joined: 10/07
Posted: 08/24/09
02:05 PM
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I would try to take some good high rez picture of where it is leaking so you can show proof to your mechanic. For the leak I don't know why it would be leaking if you have had the seals replaced twice.
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Posted: 09/15/09
02:06 PM
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First thing to check is vent tube. It gets overlooked alot even on rebuild jobs
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Jake_S
User
| Posts: 124
| Joined: 09/09
Posted: 09/24/09
07:01 PM
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I second the vent tube check. I had to clear the one on my 700r4 several times to get it completely cleared out.
Jake
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Posted: 09/25/09
02:13 AM
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If he installed one of those cheap dipstick tube bushings that could be a source of your problem too. Their known for leaking
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clay8839
New User
| Posts: 1
| Joined: 10/09
Posted: 10/08/09
03:30 PM
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hello, i have the same problem with my nova, the tranny is losing fluid from the dipstick, and i was looking into buying a flexible locking dipstick. but i didnt want to buy something that wouldnt fix the problem, can anyone give me a product review or any info on this type of dipstick, thanx
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Posted: 10/12/09
03:46 AM
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There is nothing wrong with the stock tubes and not much to cause problems. Clean'em up,install a new 0-ring and dont bend it
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1985_c10
New User
| Posts: 8
| Joined: 11/09
Posted: 11/19/09
09:03 AM
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Are you refering to the output shaft seal leaking? If so, Have you checked the bushing behind the seal? If the bushing is worn out it would cause the seal to fail.
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