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Pontiac Montana Transmission Problems

24

Comments

  • jswizjswiz Posts: 2
    I have similar problem, slipping transmission doesn't shift when hot. Drive in cool weather all day, no problem. Drive in warm/hot weather and the transmission misses gears all the time. Loses power but RPM's don't change. I was going to trade it in and the sales man (20+ years experience) said he thinks it definitely NOT the tranny, but more likely the Catalytic Converter. An old one (2001 112k miles) has junk in it and won't operate properly especially at normal temps and/or the Ox Sensor might be bad. He was certain there was no problem with the tranny itself? any help, opinion, experience? Long drives on highway and stall/surges occur (when hot), drive around the neighborhood and hardly notice any problems, some loss of power on starts but not many noticable?
  • michamaiumichamaiu Posts: 2
    montana2001: well, at 78,000 miles, it gave out on me. Started grinding horribly then just wouldn't move. Lucky for me it happened just around the block from me and within a few blocks of my mechanic (the transmission specialist!) Had a rebuilt installed and we're back in business. My mechanic was right, he said everything was pretty chewed up inside. He said he has seen this before and actually had just replaced one on an Aztec (same unit). The vehicle is driven mostly by my wife, but I do recall her saying she was noticing grinding or vibrating, too.
  • I HAVE A MYSTERY
    MY WIFE AND I DRIVE FINE IN THE CITY BUT WHEN ON THE HIGHWAY OR OUT OF TOWN THE CAR SEEMS TO DISENGAGE 3RD GEAR I THINK. IT SOUNDS LIKE AN ENGINE REV AND THE CAR DOES NOT MOVE WE JUST COAST. ALMOST TO A DEAD STOP THEN IT ENGAGES. IS MY DRIVE GEAR GOING? ANY WAY TO BE CERTAIN CAUSE THE TRANSMISSION GUY SAYS I SHOULD JUST REPLACE IT. PROBLEM IS HE HASNT HAD ANY BUSINESS IN AWHILE AND I THINK HE MAY BE OUT FOR A BUCK. SO ANY WAY TO CHECK. THE CHECK ENGINE LIGHT COMES ON BUT AFTER THE CAR SHIFTS NORMAL AGAIN IT SEEMS FINE AND GOES OUT. SO WHO CAN SOLVE MY MYSTERY? :surprise:
  • I have a 2000 Montana, when the tranny gets warmed up it has a high pitch humming noise. It also starts slamming into gear at the same time. 1st to 2nd, 2nd to 3rd, 3rd to 4th. It only does this shifting to higher gears not on a downshift. I have changed the filter myself and had a GM dealer flush the tranny, no changes have happened. I can't get it to do it for them, so they think I am just making it up. Need help with what to do from here!
  • harleyvanharleyvan Posts: 2
    Don't forget to add lubeguard when you change tranny fluid! It will smooth out the shifting and extend life of tranny! I am anti-additive but this is the exception! Want proof go to the best tranny rebuild repair facility in your area and you will learn that they add lubeguard after they rebuild! Best 15 bucks (about 7 bucks wholesale) you will ever spend on these crummy vans! My tranny has 135k with no problems!!!
  • BY TRANSMISSION LUBEGAURD DO YOU MEAN LUCAS OIL. THATS WHAT I USED. SHOULD I USE SOMETHING ELSE. I ALSO USE LUCAS OIL IN MY OIL CHANGES. tHANKS FOR ANY INFOR YOU CAN GIVE. WHEN WE ARE ON HIGHWAY WE SEEM TO SELDOMLY ACCELERATE WHILE DRIVING AROUND 55-65. THEN ONE TIME THE CAR JUST STOPPED EVEN ACCELLERATING WHILE DRIVING. WE ALMOST STOPPED WHEN IT CAME BACK.
  • i finally took it to another dealer for a different opinion, found that a pcs sensor was bad. replaced it and about $350 later everything thing seems to be ok. the part wasnt that expensive but there is some labor envolved that is the costly part.
  • Hello

    I had same issue with 2003 Montana.

    Shift delay or hard kick on 2 & 3 shifts.

    Specially uphill very hard .

    check on climbing hills.

    Also check the over drive..

    Switch from Drive to #3 & see if there's any changes.

    It runs on the highway but the inner city

    stop & Go is the problem.

    Ask one of the chops to check any error Codes

    of the tranny. ( 0742 ) is what mine shows.

    Good luck.

    Let me know if you find solution .

    dht_5@myway.com

    Takr care.
    :confuse:
  • No and you didn't even spell it right. It is lubeguard! This is not that hard and don't ask me technical questions I only have a 3rd grade education. I did learn from owning 3 of these crap vans (which by default GM admitted and stop making them) (venture, silhouette, and montanna) that the transmission usually wears out around 115k I have been able to extend life by changing every 50k and adding lubeguard (google it)I now have 150k on Montanna. As near as I can tell God put lubeguard on this earth to extend the tranny life of these crap vans!

    I due add lucas to gas @ fill up (4 ounces) and have an increase of 1.3 miles per gallon.

    Do not ever add any oil additive. I have used Mobil 1 since 1979 and Redline is better. Amsoil gets 3rd place and with the exception of a couple the rest are not true synthetics and are petroleum based and are strictly for suckers. Changing your oil is more important then brand loyalty but Mobil 1 will make you sleep better!
  • I have the same issue on a 99 Montana (whining and hard shifting from 3 to overdrive when hot). It takes about 3 hours before the problem occurs. Mr Transmission says that it needs at least $1700 of transmission work or possibly a rebuild at $3200. Another mechanic says just drive it until it fails since for most situations it works fine.

    Does anyone know the best response to this issue?
  • I had similar problems. A whole host of non-accelerating, misfiring, and gear changing issues.

    The tranny's wear out at 115. Maybe get by longer but how much?????

    Sensors on the pipe are main culprit for misfiring which can also cause some tranny like problems.

    Full tune up with plugs, ignition, fuel filter, etc... is also important.

    A complete tune up and new pipe with sensors should do the trick, but tranny will wear out. Use additive and drive cautiously and you will be many more months out of it, but don't forget, it is a GM mini van, not even close to my Honda Odyssey....
  • writerwriter Posts: 116
    Phil Edmonston's 2007 "Lemon-Aid . . . Trucks" book says that there was a TSB for 2001 - 6 transmissions which was an "upgrade kit developed to improve durability." I used the Edmunds TSB and recall finder for this TSB and I did not see one that sounds like it. This series of books is generally well researched (though you might disagree with some of the expressed opinions), however, that does not mean errors are not possible.

    Does anyone know of a TSB that would apply to a 2003 Montana transmission that sounds like this? If so, what is the number of the TSB? Also, if you know, what exactly is the "upgrade"?
  • writerwriter Posts: 116
    I think I have found the TSB: It seems to be "06-07-30-011 May 06 A/T - 4T65-E Updated Internal Components." I would still like to find out what the update consists of, but as soon as they say "internal components" I can guess that the only way to make use of the upgrade is to rebuild the transmission. So that much answers what a good chunk of what I really wanted to know, which was, of course, if I could cheaply upgrade my current transmission. (Answer is "probably not cheaply.")
  • I took my 2000 montanain and they told me it was a PCS valve that was bad. They replaced it and it works fine now. The part wasn't expensive really, but you will have about 6 hours of labor when they replace it. they have to drop the tranny enough to take a plate off of it, which includes loosening the motor mounts. So you will probably have to take it to a dealer. they can do the work in a day usually. Shouldn't cost more than about 300 dollars, maybe a liitle more depending on the hourly rate they charge.
  • writerwriter Posts: 116
    Regarding TSB "06-07-30-011 May 06 . . ." I have pretty much exhausted my usual sources (and more). I got a chance to see the TSB briefly, though I did not get to make a copy and bring it home. If you have the transmission repair manual (this goes beyond what is in the main minivan repair manuals), then the TSB is regarding the replacement of 2 parts in the transmission with new revised versions. The parts are bearing 671 and dam number 673. From the descriptions, it sounded like the point of the changes was probably to address the flow rate of the fluid, which would likely impact the lubrication and cooling. I doubt if the person I talked to has had any request to do this upgrade on a transmission, but he guessed that it would probably cost around $600 - $800 Cdn., if I had exactly that much work done (pricing at about $100 / hr. rate). If I want to do this, I can afford it.

    In my case, this leads to even more questions. Because I have bought my 2003 Montana used, within the last couple of months, I have very little idea what kind of history it has had. Since it was built around May 2003, I expect that it has the new intake manifold gasket. If the engine made it this far (about 130,000 km) without an intake manifold gasket problem, I think I can trust that it is ok.

    As for the transmission, there are reports posted of people having problems at around 150,000 km. So I might be on the verge of having a transmission problem. But such problems are not so precisely timed. What if my vehicle had a transmission problem at around November 2006, and it has already been rebuilt, and as a result of that, it also already has the upgrade? If the reports are typical, then it is not that unlikely. In that case, further work right now would be a complete waste of money.

    So it seems unlikely that I should take my Montana in to service for just this much work right now. I think I will wait till some other problem shows up, and if it looks like the motor needs to be pulled, then that might be a good time to ask to have the transmission inspected and upgraded. At least that is how I feel about it today. I could change my mind tomorrow.

    Anyway, do not expect that I will have anything more to say on this matter, hopefully for a very long time. :-)
  • i have a 99 or a 98 pontiac montana that drive fine on the highway but has a hard time getting going in stop and go traffic. does anyone know if this could be a tranny problem or something else? :confuse:
  • Hello

    I bought 03 Montana and I have the same issue like yours.

    I have taken to different Mr transmision and even to GM and was told

    I have to replace the Tranny or rebuild it.

    It's not a good feeling. I got it from an auction at the beginning of this

    year and they say it might cost you around 2500 dollar.

    I know what you are going through.

    Good luck & wish me luck too.

    Bye now.
  • Thanks Frank for the feed back. To night is the first time I have loged into
    the forum. I will follow your advise and please send me any think , I mean
    any Info about this Montana.

    Thanks again.
    Soulman
  • I know these transmission issues can be frustrating. My 2000 Pontiac Montana tranny started slipping last summer. Replaced valve and still slips, occasionally. After a lot of thought I am choosing to replace the tranny, eventually. That is my only problem with 'Old Blue' and $2000 won't even pay the taxes on a new one. New Montana's seats aren't as user friendly. One with all the options I currentlly have would be over 35,000 dollars. I have 185,000 km on her and she has never let me down. No rust, interior like new. I say she is good for another 100,000. One key factor to my luck is continual manintenace. She has never gone overdue for an oilchange, if I plan a long trip I take her in for a check up. No more costly than maintenance on an import, almost same results. Tranny can go in any vehicle. I love the old Montanas. They get pretty good gas mileage and are super comfy for long trips. My next vehicle will have side curtain airbags.
  • tcharrontcharron Posts: 1
    I own a 2000 Montana and just recently the change oil light came on halfway before the oil is due for a change. The light only stays on for a minute or so when I start the motor. I checked the oil level and it is good and the oil looks clean. I've tried to reset it, but it still comes on. Is it a sensor? Any thoughts?
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