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Discussion Starter #1
At 170K, the diff in my '07 SE, 4.0 six is "rumbling". Flushed lube, found some metal filings but nothing else. Noise seems a little less but still present. My questions are:
1.) should I repair or replace the rear?
2.) if replace, what other rears fit and are there other rears that could improve mpg in this "light duty" truck?
TIA, Paul
 

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You will have to take it apart to determine if it is worth fixing.
No,changing rear ends will not improve gas mileage.Maybe if you go to taller gearing.
 

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Have you checked your coolant color?
Do you know why I'm asking?
 

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More than likely you have a C200K.
You also might have a M226.
Taller gearing than what?
We don't what the gearing is in your truck now.
This was suppose to go under your other post about differentials.
 
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