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Discussion in 'The Garage' started by bigbadchev84, Mar 27, 2006.
how do i adjust the vacuum modulator on a th400?
Assuming you have an adjustable modulator you use a small screw driver and turn the screw that is inside the vacuum fitting. Make small adjustments at a time.
ok well i got that part but what i meant was what happens to the shifting when i turn th screw in? out? thanks
Can't remember which is which but one way will make the shift later firmer and the other will make it earlier and softer.
Turning the adjusting screw IN makes it shift a bit harder and later..turning it OUT makes it shift softer and earlier...you'll only get a range of about 10-15 mph difference at what speed it shifts at,and only a firm shift if you crank it IN ,there isn't a huge difference really..
I read your other post...sorry its the direct clutch,I was hoping it was something easy and cheap for you to fix..
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