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Pinion leakage problem

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Old Sep 6, 2016 | 12:25 PM
  #1  
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Default Pinion leakage problem

Car developed a pinion leak a few weeks ago (decent sized one). Rear was redone about 6 years ago by DTS in Warren MI and haven't had an issue up to now.
took it to them on friday and they changed a pinion seal. still leaking about the same amount.
I lowered the car this spring (about 1 1/2") but didn't use an adjustable panhard bar (rear was only off about 1/2" side to side so would have needed 1/4" of adjustment. figured I could get away with that. Did this possibly cause my problem?
car has 65k miles on it. makes about 380rwhp with listed mods. It isn't drag raced from a dig hardly ever, but is driven "spiritedly".
Any rear end gurus have any ideas where my problem might be?
no noises of any kind coming from rear.
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Old Sep 6, 2016 | 03:49 PM
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From: Turnin' Wrenches Infractions: 005
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No, and sometimes fresh seals leak some. Id make sure the level is correct (not overfilled) and watch it closely. If it continues you will need to swap seals again. I prefer an ac delco oem seal. Also, inspect the mating surface on the yoke and I would permatex the seal into the housing.
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Old Sep 6, 2016 | 03:53 PM
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I'm sure the installer inspected the rear yoke (or hope that he did). Thought there could be pinion bearing issues but no rear end noise.
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Old Sep 13, 2016 | 01:23 PM
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It can also weep through the splines on yoke - sealer should of been added there
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Old Sep 14, 2016 | 08:58 AM
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From: Turnin' Wrenches Infractions: 005
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That's is correct. I always put sealer on the splines and on the outer edge of the seal where it meets the housing.
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Old Sep 14, 2016 | 09:05 AM
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going back to DTS for try number 2 on Friday. Got my fingers crossed. hard to have car sitting in garage not drivable (don't want to run lube out, its a 25 mile drive to DTS).
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Old Sep 14, 2016 | 09:57 AM
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What rearend is it?
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Old Sep 14, 2016 | 04:29 PM
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Factory 10 bolt. DTS put in a Trutrac and 3.73 gears 5-6 years ago.
Rear never leaked a drop until the day of the dream cruise. There was a puddle of about 2-3 tablespoons under the car. About the same size spot after they changed the pinion seal.
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Old Sep 18, 2016 | 06:47 AM
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new pinion seal, dry as a bone.
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