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Old 12-09-2003, 03:48 PM
suginami suginami is offline
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Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,508
My mechanic tells me that a fault code for the upshift delay valve is 90% of the time a problem with the upshift delay valve holding vacum.

It is located on the side of the transmission.

It is a common failure part, and costs abut $250-ish for the part.
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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".
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