gford Posted December 4, 2000 Share Posted December 4, 2000 works fine in first gear, but , when it shifts to second it slips terribly. It obviously doesn't have any pressure or the plates are slipping. Where do I start looking first and what all could cause this?<P>------------------<BR>GMFord Link to comment Share on other sites More sharing options...
Don Caithness Posted December 4, 2000 Share Posted December 4, 2000 When it shifts back into low does it do so with a definite "bang". Mine did when the a/c was on causing the idle/manifold vacumn to drop too low. Resolved the problem by installing an adjustable modulator from a diesel car application. Just a thought!<P>------------------<BR>Don Caithness<BR>Technical Advisor<BR>1967&1974 "A" Body<P> <A HREF="http://appraisals.webjump.com" TARGET=_blank>http://appraisals.webjump.com</A> <BR> collectorcarappraisalservices@attcanada.net Link to comment Share on other sites More sharing options...
Guest Posted December 8, 2000 Share Posted December 8, 2000 Try the vacuum modulator and the vacuum lines leading to the modulator from the manifold.<BR>This is a common problem with that transmission. Let me know and good luck,John.<P>John Lyman, Certified Automotive Instructor.<BR>ASE Cert. Link to comment Share on other sites More sharing options...
gford Posted December 11, 2000 Author Share Posted December 11, 2000 Don Didn't have any down shifting problem. Thanks anyway.<P>John I checked the vaccuam line and it was o.k. Changed the modulator to one I know to be good and will take it out some time this week to see if it helped the problem. (got to move some cars- no time just now) Will let you know. Thanks<P>Garry<P>------------------<BR>GMFord Link to comment Share on other sites More sharing options...
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