I am now sure that the noise is coming from the box. Has anyone had any luck rebuilding them? I know there is a seal kit available, but any of the internal parts?

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1987 300D, 212,000 miles
1997 Ranger, 300,000 kms
2004 Honda Civic Si - 110,000 kms. FOR SALE
2004 Mazda 3 Sport - GF's car, but it's my problem....

Montreal, Quebec - The Rust and pothole capital of North America!