1999 ram van 1500 blower has been switching to defrost on acceleration now transmission acting funny- why?

Asked by mulfmeister Oct 19, 2011 at 09:56 PM about the 1999 Dodge RAM Van

Question type: Maintenance & Repair

1 Answer
199,805

dandyoun answered 12 years ago

my 2000 1500 was doing similar. it turned out to be vacuum leak in vacuum line between intake and heater controls. fixed cracked "t" in vacuum line and all started working fine. hope this helps

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