Question about 1996 Jeep Grand Cherokee

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Vacuum reservior 1996 Jeep Grand Laredo

Thanks for your reply it is much apreciated could you please tell me how I check if it is faulty because I am having a problem with the airconditioner changing from face level to windscreen defrost when climing hills or under heavy acceleration. Would the vacuum reservior have anything to do with the automatic gearbox (I susspect not)? My gearbox wont change gears from 3rd to 4th when I plant the foot to overtake at around 100 KMH(60MPH), at about 120 KMH the motor cuts out, but if I accelerate normally over 100 KMH the gearbox changes as it is suppose to. The govener is suppose to cut in at about 170 KMH so I don't susspect that to be the problem. Once again thanks for your feedback

Kind Regards,
Kim Nelson,

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  1. Go to a junk yard nd buy any vacuum can, I have one out of a ford the large food can type, here is good, mine is next to the brake system
  2. Mount this some where out of the way, any w
  3. Buy some good vacuum hose about 5 ft. 3/8size
  4. pull off the hose at the check valve, run your hoses to/from can and to plastic hose,
  5. your as good as it gets, no more changing vents....
  6. check for leaks, by pulling off the hose the cruise, engine off, a leak will acure.
RT San Diego

Posted on Nov 10, 2008

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The vacuum res. is a black (can,football,round) shaped item. I do not remember if it is behind the bumper on the pass. side of car. It could also be under the hood on the pass. side. Pass. side under the hood are vacuum lines, follow them, one will go to the res.

Posted on Nov 06, 2008


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Posted on Jan 02, 2017

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Something could be draining the battery when the car is off.
Make sure no lights are left on.
Does it have lighted mirrors in the sun visor that are on?
Your problem with the a/c vents is vacuum. The car is losing it's vacuum supply and is defaulting to the defroster.
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