Hello, I see many posts on vacuum/transmissions problems. My 86 SDL doesn't want to shift into third until warm. I spend many hours in this forum and wanted to know if this is across the board for 300 model MB, or for certain models ie older models? Removing vacuum lines from the black box on valve cover, checking vacuum etc. I guess I'm looking for SDL specific trouble shooting and don't know what models cross over? This is a great site, anyone traveling through Amarillo give me a call. I have a large shop/tools and secure parking. Shawn

The warm shift kinda makes you think of buildup.

I'm starting to hear nice things about this product:
http://www.auto-rx.com/auto-rxnet/index.html

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'84 300SD sold
124.128