86-87 transmission vacuum

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86-87 transmission vacuum

10-05-2008, 05:48 PM

sixto

smoke gets in your eyes

Join Date: Jun 2000

Location: Eastern TN

Posts: 20,851

86-87 transmission vacuum

Why do 86-87 603s need a vacuum amplifier and temperature VSV? I don't see these devices up to 85 and in 603s from 92. I know it has something to do with adjusting the vacuum signal based on coolant temp and boost, but why was this not necessary previously or after?

Do 2.5s and 350SD/Ls have these devices?

Is it possible to fit a pre-85 or 92-on modulator to an 86-87 Diesel and bypass the vacuum amp, if only for simplicity?

Thanks,
Sixto
87 300D

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