How to tell if transmission modulator is bad | Ford Explorer Forums

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How to tell if transmission modulator is bad

bfsjr

Member
Joined
October 17, 2004
Messages
18
Reaction score
2
City, State
midlothian, virginia
Year, Model & Trim Level
1993 explorer xlt
My 93 Explorer has a bit of a rough idle and when I put it in reverse, it gets a little rougher at idle. Does this sound like a bad tranny modulator. I have no codes and there is no trans fluid in the tranny vacuum line coming off the vacuum octopus. When I take this vacuum off the octopus and block the vacuum inlet at the octopus, the idles is the same.

Can anyone help?
 






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