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In reading through the recent auto transmission threads, it looks like some sort of mechanical or cable-operated modulator is the best option to be installed in place of the vacuum version on the non-electronic transmissions. I did check out the PATC one, which appears to only work on GM. Anyone know of other sources?
 

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Use the Google, Luke!

For what transmission?
 

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If you're handy I can't imagine it taking much to build one from scratch. Just take a vacuum modulator apart, check it's max stroke from 20-0" of vacuum and build a simple lever to duplicate the same movement taking into account the throw you're throttle arm has. Doesn't need to be that accurate, The only real importance is that you have low pressure at idle and high pressure past mid throttle.

You could get even more complex and fill the modulator with fluid and hook up a clutch slave or similiar and rig that to your throttle.
 
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