Question about 1999 Pontiac Montana

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On a roadtrip transmssion shifts fine until about five hours then it shifts hard(jerks) when it shifts. i have had the van about one and a half mounths,it has alittle over 90,000.00 miles on it. it has shifted fine all the rest of the time & fine after the trip as well

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I had the same problem with my 1999 Pontiac montana. Unfortunately it is a transmission shop problem. There is a shift solonoid that commonly goes out on these montana's and you have to remove the transmission from the vehicle, remove the left side of the transmission and change the solonoid and recalibrate it. This fixed my montana from the same problem. IF you do not change this solonoid, it will cause tremendous wear on the transmission and it may cost you a new transmission which are relatively hard to find and expensive. I hope this helps. krensdc@comcast.net

Posted on Aug 01, 2009

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I would change the transmission oil and see if the problem is still there.

Posted on Jun 18, 2009

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1 Answer

Van does fine until you reach about 45 miles per hour and you get a jerking hesitation until you reach about 50 miles per hour and it stops. doesn't do it any other time.


You may want to do a basic tune up. Plugs, wires, cap&rotor, PCV, and don't forget the fuel filter. It is a forgoten, yet sometimes vital, part of a tune up. If you have already done this within a reasonable mileage, hit me up and we'll try to figure this thing out.

Jun 14, 2011 | Mercury Monterey Cars & Trucks

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after checking oil level in auto box(top line on dipstick in "P")try this,without using any gas at all,put into drive and let car reach max speed (about 30/35).then using half gas do the same, without moving your right foot,then if safe do the same, with full gas.as the gearbox is computer controlled, you have just reset the shift pattern back to its start position.The car will now change according to your driving style,(if multi user,it will take about 50m to read your style again)
if driven hard it will change hard.......
any help??

May 02, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

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On this van with this problem you should have it serviced by a flush tool. You can also get BG Trans additive to help this. I would say if you can drop the pan yourself do it change the filter add fluid and the BG additive. If you feel real good about your skills takr the upper trans line off the radiator drop it into a bucket add a funnel to you dipstick tube start the van and pour in the fluid at the same rate it comes out into the bucket. Do this untill you run 12 quarts through. Then stop the van reinstall the trans line. check the fluid level. If ok then install the BG trans additive. Google bgfindashop.com and enter your zip code that will tell you the shops where you can buy the chemical.

Mar 01, 2009 | 1999 Dodge Caravan

1 Answer

Transmission 1993 dodge caravan 3.0


take it to cottman transmission

Feb 27, 2009 | 1993 Dodge Caravan

1 Answer

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check the files on this site where Villager owners help each other. I'm sure we covered this.
http://autos.groups.yahoo.com/group/villagerquest/

Dec 13, 2008 | 1999 Mercury Villager

3 Answers

PO171 & PO440 2 times


Check out www.carsurvey.org for more information on your problems. There are others who have had similar experiences

Jun 06, 2008 | 1999 Pontiac Montana

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