I think your downshifting problem is completely unrelated to the upshift delay valve function.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Suginami,thanks for quick reply. Any ideas as to what my downshifting problem is from.Thanks Bill

I'm sorry, but I have no idea.

My first instinct is to check the level of your trans. fluid.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

I recently had my upshift delay actuator and one of the O2 sensors replaced by the dealer to correct CEL and poor gas milage in my 94 E420. After the service it seems to delay all shifts alot when cold, still some delay when warm compared to how it used to shift. This car does not have 2nd gear start.
1. What temp. does this delay work off of? Engine coolant? Trans temp? Cat conv.?

2. I frequently must turn onto busy streets and highways so i was wondering if there was any way to disable the delay or trick it without setting off the CEL.

3. What effect does trans fluid level have on shifts? I suspected the dealer overfilled the trans so I sucked some out which seemed to improved the shifts. but when I check it the fluid is always way above the mark on the dipstick and I feel really stupid for not being able to determine how much fluid is in there.

FYI, to replace my delay actuator at the dealer it was only around $400. 200parts 200 labor roughly.

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Will
94 E420
82 300DT
77 F250 4x4 429 Cobra Jet
69 Thunderbird 429 Thunder Jet
92 Mitsubishi Galant VR-4

how funny and strange when people invent things about these type of problem lol.