Dave1647545494 Posted March 8, 2006 Report Share Posted March 8, 2006 is there supposed to be a cable or is it all vacum controlled? if its all vacum controlled how do I go about adjusting it? Quote Link to comment Share on other sites More sharing options...
MaverickGrabber1972 Posted March 8, 2006 Report Share Posted March 8, 2006 ford c4s use a rod all it does is kick down.. off or on if you need it to hold longer in gear if it don’t have it you will need to replace the modulator valve on the pass rear side of the trans that has the vacuum line going to it ...there should be a screw inside the modulator ...after you pull hose off to adjust it ..a little makes a big different there are two types push in held in by a clip and bolt or screw in the modulator screws into the case if you do remove it make sure not to lose the little rod witch is the valve they tend to come out when you don't see them Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted March 8, 2006 Author Report Share Posted March 8, 2006 so it's all vacum controlled? the modulator might be bad then it never downshifts when the accelerator is pressed and the up shift points are high (no tach) but it sounds like 4-5k rpm Quote Link to comment Share on other sites More sharing options...
MaverickGrabber1972 Posted March 8, 2006 Report Share Posted March 8, 2006 make sure there is vacuum going to it........... most of the time if the modulator is bad there will be trans fluid dripping from the modulator it can make a nice white smoke if the engine burns it Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted March 8, 2006 Author Report Share Posted March 8, 2006 its all hooked up with a good vacum line do I turn the screw in or out to adjust the shift point Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted March 8, 2006 Report Share Posted March 8, 2006 is it down shifting? or are you trying to get it to kick down? Quote Link to comment Share on other sites More sharing options...
MaverickGrabber1972 Posted March 8, 2006 Report Share Posted March 8, 2006 out for sooner in for longer ...if you have a vacuum can hooked up with it they tend to play hell with them giving false vacuum signals Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted March 8, 2006 Report Share Posted March 8, 2006 what about the temp controlled vacuum switch? that dont help either.. Quote Link to comment Share on other sites More sharing options...
MaverickGrabber1972 Posted March 8, 2006 Report Share Posted March 8, 2006 the modulator should be on manifold vacuum Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted March 12, 2006 Author Report Share Posted March 12, 2006 its right on manifold vacum it upshifts late at light throttle and it won't kick down unless I shift it down manually Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted March 13, 2006 Report Share Posted March 13, 2006 do you have the kickdown rod hooked up, if it is, its not adjusted right! Quote Link to comment Share on other sites More sharing options...
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