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Rear Diff Oil and Red Fluid on driveshaft

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Old 03-23-2013, 09:52 PM   #1
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Rear Diff Oil and Red Fluid on driveshaft

Will this fluid work for the rear diff oil in a 06 DCLB Sport?
http://www.castrol.com/castrol/secti...tentId=7036192
And if so, should I add friction modifier or not?

While under the truck I noticed a small clean drop of red fluid on the bottom of the round metal housing that connects the drive shaft to the transmission. Is this an indication of needing a new output seal?

Thanks!
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Old 03-25-2013, 08:59 PM   #2
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Pretty quiet in here huh?
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Old 03-25-2013, 09:04 PM   #3
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I have that same drop
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Old 03-26-2013, 05:29 AM   #4
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Read the bottle on the oil jug to make sure it's got the friction modifier required for a limited slip differential and not just compatable with a limited slip differential. A lot of gear oils say limited slip compatable but that means you still need to add the friction modifier to make the LSD function properly.

As far as the fluid, I think I'd be looking at changing that seal if I were you.
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Old 03-26-2013, 06:03 AM   #5
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Quote:
Originally Posted by NorCalTRD View Post
Will this fluid work for the rear diff oil in a 06 DCLB Sport?
http://www.castrol.com/castrol/secti...tentId=7036192
And if so, should I add friction modifier or not?

While under the truck I noticed a small clean drop of red fluid on the bottom of the round metal housing that connects the drive shaft to the transmission. Is this an indication of needing a new output seal?

Thanks!
RED fluid is your automatic transmission so you need to change seal and make sure transmission fluid level is correct.
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Old 03-26-2013, 10:21 PM   #6
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Thanks everyone, I went ahead and changed the diff out with some new fluid and additive. I replaced the leaky seal and will be compiling a DIY on it for TW.
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Old 03-26-2013, 10:26 PM   #7
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Was it hard ? I havent bothered because its so minimal
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Old 03-28-2013, 06:44 PM   #8
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Easy as pie, and it may seem like an insignificant leak but mine was at least 1/2-3/4 quart low when I topped up after fixing it.

Id say do it, and if you need some pointers check my DIY write up.
Should take 20 mins and about $20 for the seal and a quart of Toyota WS ATF fluid.

Ive been checking my housing everyday since doing it and no more leak!
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