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Old 06-21-2006, 10:36 AM   #1 (permalink)
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Is there a proper way to actully adjust the trans. modulator on a C6 trans. I noticed there is a little screw in there that looks as if it could be adjusted. I am having some shifting issues when in drive. It does not seem to downshift soon enough when under acceleration. I do not have a kickdown cable either. Under normal driving the trans shifts fine. I am thinking about getting a kickdown cable but thought maybe adjusting the trans modulator could help things as well.
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Old 06-21-2006, 10:41 AM   #2 (permalink)
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Sounds (to me) like the kickdown cable is the 'right' solution, i'm always hesitant to adjust the modulator (period). Bad expirence has taught it me it is easy to mess up and hard to correct
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Old 06-21-2006, 10:51 AM   #3 (permalink)
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Get the cable/rod....

As far as modulator goes, clockwise raises shift points, CCW lowers them. Do it 1/4 turn at a time...

The modulator has nothing to do with forced downshifts. You can always use the shifter and do it manually

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Old 06-21-2006, 11:16 AM   #4 (permalink)
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Do you know what would be the correct set point? As if it were purchased new? I'd like to check it and see if the PO messed with this at all. Or should i just buy a new modulator? Thanks.
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Old 06-21-2006, 11:47 AM   #5 (permalink)
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Depends on rear gear and engine build state. Typical OEM is ~12-15mph for 1-2 and ~22-27mph for 2-3 under normal throttle conditions. Be aware the modulator will only be involved in downshifts in this range. Above that, only the manual downshift valve (or your hand on the shifter) will force a downshift.

As fare as how many turns is OEM from closed/open, I have no idea...

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