I had this problem licked for a while, but now we're back to having worse troubles. The transmission absolutely refuses to shift into high, and it's pretty flaky in lower gears. I've done the following:

1) Checked the vacuum going over to the right side of the engine and it isn't holding vacuum.
2) Tried to pull vacuum on the vacuum amplifier. It held it on the VAC nipple, but not on the TRA nipple. Is that the way it's supposed to be? This is the nipple that goes to the black line to the transmission, so I would think it would need to hold vacuum. True/false?


I plan to replace the rubber over on the right side. I was going to do that anyway, but if the vacuum amplifier won't even hold vacuum, wouldn't that indicate a problem as well?

Thanks for any help.

- Ted

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1987 300SDL 265,000 mi.
1982 300SD 325,000 mi. (and holding)
1956 Packard Clipper 150,000 mi.