Question about 2000 Pontiac Montana

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Why won't my 2000 pontiac montana transmission shift out of 2nd gear? I have changed the filter, and code 1639 shows. There are no filings in the fluid. Can someone help?

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  • Master
  • 467 Answers

The transmission is gone, check all fuse and relay for the transmission. last effort, hope it fix your problem

Posted on Aug 01, 2009

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  • Pontiac Master
  • 501 Answers

Modern transmissions default to 2nd gear when there is a problem. It is called limp mode. The code you gave is complex to diagnose. if you cna't click on the following lind, cut and past it into you browser heading,not a search engine and follow the directions.


http://www.hotrodlane.cc/New%20LS%20Links%20Page/LS%20trouble%20codes/DTC%20P1639.htm

Posted on Aug 18, 2009

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Posted on Jan 02, 2017

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1 Answer

Which solenoid would I need replaced: skips 3rd gear... goes straight from 2nd to 4th (2000 Pontiac Montana)


first you need to know engine and transmission faulty code
next it's a default mode when there is a faulty code this is why you need code
hope it helps

Apr 05, 2014 | 2000 Pontiac Montana

1 Answer

When im driving there is a loud droning noise,when it is in park the engine is fine,i just changed the transmission oil and filter,some times when you put it in drive you pull away and when it changes


Make sure the fluid level is full. The fluid level drops after shifting through all of the gears. Are you sure that you put in the proper transmission fluid?

Mar 12, 2014 | 2000 Pontiac Montana

1 Answer

Pontiac montana whurring sound, constant while in motion


Drive until the sound appears and move the steering wheel left and right a little.Can you change the sound at all?If so it's wheel bearing time.

Jul 02, 2017 | 2006 Pontiac Montana SV6

1 Answer

My 2000 Pontiac Montana gear shift lever moves freely, but does not shift. Where is the linkage located under the hood and to the transmission and how do you repair or replace it?


there is no linkage there is a cable fron the transmission to steering column nylon gromets on each end break replace shifter cable

Aug 31, 2013 | 2000 Pontiac Montana

1 Answer

01 Impala LTZ with 3.8 Trans won't shift out of


CHECK TRANSMISSION FLUID LEVEL FIRST BUT IT SOUND LIKE YOU NEED A FLUID AND FILTER CHANGE IF TRANSMISSION FILTER STOPPED UP TRANSMISSION PUMP CAN DRAW FLUID THROUGH CLOGGED FILTER.WHEN ENGINE AND TRANSMISSION GET HOT FLUID WILL GET HOT AND THIN ENOUGH TRAVEL THROUGH FILTER SO CAR CAN SHIFT INTO OVER DRIVE.DO A FLUID AND FILTER CHANGE SEE WHAT HAPPENS.

Aug 31, 2011 | 2000 Chevrolet Impala

1 Answer

2000 Pontiac Montana . Goes into gear hard when it shifts. Has 140000 miles on it.


It sounds like the pressure control solenoid inside the transmission. With that many miles I would suggest going ahead and rebuilding it. You need to remove the transmission from the van anyway to replace the solenoid. I have rebuild several of these, be sure to put in a shift kit, it makes a big difference. I've rebuilt them before and wasn't happy with the way it shifted, so I pull it back out, put in the kit and that did the trick. So, needless to say, I always put the kit in the first time. Although, I do know a guy that changed his filter and added some Lucus oil treatment for the transmission to the new oil, and he says he hasn't had that problem sence........makes me wonder.

Mar 07, 2011 | 2000 Pontiac Montana

1 Answer

Transmission slipping from 2nd gear to 3rd


Check the transmission fluid condition and level. Dirty transmission fluid can case the solenoid to stick when changing gears causing the problem. The other thing also that can cause this a bad EPC (Electronic Pressure Control) valve or bad boost valve causing low transmission fluid pressure throughout the transmission line. At worst your clutch pack is worn and needs to be replaced. Have a transmission shop hook up a gauge to test your transmission pressure throughout the shift points to determine if your EPC and or Boost valve needs to be replaced. If the transmission shop is good they can add a 12volt 6.5 Ohm resistor inline with your ECM signal to the EPC to firm up the transmission shift to keep the transmission from burning up the clutch packs in the future. Good luck and keep me posted.

Jan 25, 2010 | 2000 Pontiac Montana

1 Answer

I have a 2000 Pontiac Montana and the code states I need to change the shift solenoid where is this found and is it hard to change? Thanks


Yes it is hard to change. It is in the side cover of the transmission. The transmission will need to be removed to replace it.

Jun 30, 2009 | 2000 Pontiac Montana

1 Answer

Pontiac Montana has computer codes


Most GM it takes about 100 start cycle to clear any DTC codes that do not reoccur. As for the lack of power when accelerating could be a dirty fuel filter and needs to be changed.
As for the EGR Valve code it may be getting carboned up and need to be replaced or cleaned soon with carb cleaner. First try changing the fuel filter for your lack of power.
If you are ever going to have you Montana Rescanned and don't mind spending a few extra dollars, Have a Dirve Cycle DTC test done. http://myweb.accessus.net/~090/dtcobd2n.html
Good luck and hope this helps. Note: The program on the transmission on the Montana thanks to GM and there wisdom was made to slip when the transmission is cold to warm up the drivetrain quicker, which premature failure is common around 150,000 KM or 100,000 Miles just after the warranty. Regular transmission fluid and filter change will help exten the life of the transmission on the Montana.

May 26, 2009 | 2000 Pontiac Montana

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