https://www.f150online.com/forums/sh...d.php?t=323510

I was hoping one of the S'Crew brothers could maybe give me some advice......

 

I'd start with Jiffy lube and find out what type of rear axle oil was used and did they add some friction modifier additive too. Sounds like they used the no charge fee cheap dino oil ??

My 02 owners book calls for motorcraft 75w-140 synthetic oil and also 4oz of friction modifier c8az-19b546-a.

I'd also check the trans and engine oil level too cause you'll never know??

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