Simple answer to differential cover removal
Simple minded as I am, I had my jack stands located under the main support beams. When I removed the bolts to the diff. support, it wouldn't lower to give me room to remove the top bolts of the diff. cover.
I placed the jack stands in a different location, the diff. lowered as it should and all went well. Everything came apart and together with ease, axle shaft in and running smooth.
1985 300TD, 180K
1980 240D. 335K