Thread: Help with TH400 gearbox
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Old 08-30-2012, 03:29 PM
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Join Date: Dec 2001
Location: Castalia, Oh
Cobra Make, Engine: EM cobra, 450 inch sbc running a best ET of 9.14..so far..ALL MOTOR...approx 800 horse.............ERA with 482 FE..All Aluminum Engine
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If I remember correctly, the TH400 has a vacuum modulator located on the passenger side of the tranny. Some were located at the back of the trans and others on the side. This modulator controls shift points and you can buy an adjustable one. Could be something wrong with the vacuum line.
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