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Old 02-16-2011, 09:03 AM
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Torque converter leak?

Is it possible for a torque converter to leak? Replaced the front seal, carefully, and it still leaks. It's tight, but I think I can see the lip of the seal and there is no drip there, it is running down the back of the converter. When I pull it again, is there any way to test it, or do I need to take it to a shop?
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Old 02-16-2011, 10:05 AM
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Hi,

Yes. It is unusual. But if the torque converter "ballooned" due to stress or torque overload, or had a defective weld, it will leak. It is made of multiple parts that are welded together. I've seen this on 4wd trucks that have been "abused" badly. However, most leaks are at the "front pump" seal. If you're not seeing it there, then suspect the converter.

For testing, you have to take it to a trans shop. But for the cost and hassle, Summit has quality converters that may be the least costly option.

Good luck,

Matt
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Old 02-18-2011, 07:02 PM
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You probably need the pump bushing replaced. Take it to a tranny shop with the converter so the can size the bushing in the pump.Oh and your gonna need another seal.
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Old 02-18-2011, 07:10 PM
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Quote:
Originally Posted by msilveira
Hi,

Yes. It is unusual. But if the torque converter "ballooned" due to stress or torque overload, or had a defective weld, it will leak. It is made of multiple parts that are welded together. I've seen this on 4wd trucks that have been "abused" badly. However, most leaks are at the "front pump" seal. If you're not seeing it there, then suspect the converter.

For testing, you have to take it to a trans shop. But for the cost and hassle, Summit has quality converters that may be the least costly option.

Good luck,

Matt
Ford had an issue with there torque converters in the taurus in 2003-2004. they were leaking at the bolt pads where they were welded. not sure if the weld was the problem or if the pad was starting to rip loose/cracking.I replaced a few for that.
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Old 02-19-2011, 08:26 AM
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leaking torque converter

FYI. I pulled the torque converter and inspected it, looked fine. Managed to seal the tube with duct tape and apply some air pressure. It sprayed fluid from under the weld on the neck. (just opposite the seal, so it looked like a leaking seal).
Installed a new one, all is well.
Thanks for the tips here, I wouldn't have thought a torque converter could leak.
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Old 02-19-2011, 09:29 AM
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you performed what is known as a pressure test on the converter and found the crack. Usuallyy 5 to 15 pounds of air will find a leak

Typically the first thing a converter company will do is a pressure test. Usually low pressure and look for oil to leak - spray out as you noticed.... If there is no oil leakage, the converter would b placed under water like a tire would be and watch for bubbles.
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