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Old 08-15-2013, 07:00 PM   #1
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Question Exhaust dumped before the axle... causing issues?

So, I've had my Flowmaster 50 series dumping before the axle as of maybe 3 months ago. Right before that, I had my gears replaced in the rear along with new bearings. I heard humming again and ended up taking it in to the local driveline shop (one that I trust) and they said that my oil was burned up and basically bearings and gear set are eaten up pretty bad as well.

Is is possible that the heat from the exhaust dump is causing my oil to basically cook itself and lose its properties? Thats the only thing that I can think of that is causing premature failure like this. Everything else has been pretty standard highway driving.

I'm super bummed at the moment, just because I have no more cash at the money to burn (I just replaced my rear shocks-- broke a bar pin and bent the mount screws somehow... upgraded to Procomp Pro Runners... although I'm not sure if it's an upgrade, and still need to replace a missing JKS Swaybar disconnect).

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Old 08-15-2013, 07:15 PM   #2
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The driveline shop didn't do a good install, it wasn't your exhaust. Hopefully they warranty their work.

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Old 08-15-2013, 07:52 PM   #3
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It had a warranty for 3000 miles or 3 months... unfortunately, its past that.... same shop though. Kinda bummed. The bearings were done about 9 months ago. Would you think it's the bearing install or the gear install that would be part of it?
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Old 08-16-2013, 11:35 AM   #4
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Did you use a "break in" gear oil? If so, was it changed out after roughly 500 miles? If not, then that could lead to your premature gear/bearing failure.
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Old 08-19-2013, 01:50 PM   #5
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Ooh good point, I did have a break in gear oil. I forgot to change it after 700 (or 500) haha. I did end up replacing it after about 2000 though.
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Old 08-19-2013, 02:01 PM   #6
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Time to find a new axle/driveline shop. Sounds like they did not set it up properly.
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Old 08-19-2013, 02:01 PM   #7
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Not that I think you shouldn't replace the oil 500-1000 miles after new gears, but how many vehicles do you think roll off the factory line, are bought with less than 500 miles on them, and have the gear oil changed at 500-1000 miles?
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Old 08-19-2013, 02:15 PM   #8
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The place that changed out my gears didn't use any breakin oil, anyway. They tell you to take it easy on them for the first 500 miles, no trailer pulling, etc.

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