Question about 1988 Ford F 250
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Posted on Jan 02, 2017
This particular van should not have a vacuum modulator. That part is located on the transmission and controls shifting which is electronically controlled on the 94 models.
Posted on Dec 13, 2009
There is no vacuum modulator valve , this transmission is all electrical controlled . What seams to be the problem ? no shifting , shifting hard ETC....... shift solenoid inside the transmission maybe , input or out put speed sensor bad . Do you have a check engine light lit ? There probably is a DTC - diagnostic trouble code .
Posted on Dec 05, 2015
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