What size banjo nut will I need to connect to the transmission of my 1995 e300d so that I can hook up a vacuum gauge to adjust the transmission accurately. Thanks

Get a rubber tee and tee into the signal going to the transmission. It should be hi at idle and fall off as you press on the throttle. The controller is trying to simulate the same vacuum signal you get off a gasoline engine.

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Jim

Im trying to do as Mercedes says is the right way to adjust the transmission and its through the port that is below the modulator.

Are you attempting to adjust vacuum or attempting to adjust transmission modulator pressure with a pressure gauge?

I'm attempting to adjust transmission modulator pressure with a pressure gauge.

Your OP stated "vacuum gauge".........and that was the confusion. Jim's advice was based upon that.

My mistake I presume that this will adjust the tranny oil pressure then. Is that correct?

Now I see. You are wanting to measure hydraulic pressure and not vacuum.
I do not know the size of the banjo bolt. If you can take a pic of it and send it to Phil he can probably provide the size.

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Jim

IIRC you can use the banjo bolt from the ALDA of a turbo 617.

Sixto
87 300D

Anyone have an extra I can purchase?

I did just that. Replaced it when I was done.

Yes but a '95 E300 doesn't have a pressure signal line to the ALDA... if it even has an ALDA

Sixto
87 300D

NO ALDA but would appreciate anyone letting me know if they have one.

Where are you at? If I can remember I'll look tomorrow to see if I have a spare laying around.

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Jim

Syracuse,NY