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Pontiac Montana Transmission Problems

59 messages,  Last post on Nov 23, 2009 at 7:24 PM

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What is this discussion about? Pontiac Montana, Pontiac Montana SV6, Van

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#26 of 59 HELP WITH 97 PONTIAC MONTANA SHIFTING MYSTERY by battleaxe68 Jun 05, 2007 (4:02 pm)
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?
#27 of 59 slamming into gear by oneeye1977 Jun 06, 2007 (6:15 pm)
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! Replies to this message: oneeye1977 (Aug 02, 2007 6:19 am) heritagehei (Sep 19, 2007 8:19 am) jswiz (Sep 19, 2007 11:01 am) oneeye1977 (Sep 26, 2007 3:46 pm)
#28 of 59 transmission problems by harleyvan Jun 21, 2007 (6:49 pm)
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!!! Replies to this message: battleaxe68 (Jun 22, 2007 8:14 am) harleyvan (Sep 14, 2007 5:46 am)
#29 of 59 Re: transmission problems [harleyvan] by battleaxe68 Jun 22, 2007 (8:14 am)
Replying to: harleyvan (Jun 21, 2007 6:49 pm) 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. Replies to this message: harleyvan (Sep 14, 2007 5:46 am)
#30 of 59 Re: slamming into gear [oneeye1977] by oneeye1977 Aug 02, 2007 (6:19 am)
Replying to: oneeye1977 (Jun 06, 2007 6:15 pm) 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.
#31 of 59 Re: Pontiac Montana transmission problem [fclay] by soulman613 Aug 03, 2007 (8:42 pm)
Replying to: fclay (Dec 24, 2006 7:15 pm) 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_5myway.com   Takr care.
#32 of 59 Re: transmission problems [battleaxe68] by harleyvan Sep 14, 2007 (5:46 am)
Replying to: battleaxe68 (Jun 22, 2007 8:14 am) 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!
#33 of 59 Re: slamming into gear [oneeye1977] by heritagehei Sep 19, 2007 (8:19 am)
Replying to: oneeye1977 (Jun 06, 2007 6:15 pm) 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? Replies to this message: jswiz (Sep 19, 2007 11:01 am) oneeye1977 (Sep 26, 2007 3:46 pm)
#34 of 59 Re: slamming into gear [heritagehei] by jswiz Sep 19, 2007 (11:01 am)
Replying to: heritagehei (Sep 19, 2007 8:19 am) 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....
#35 of 59 A TSB Regarding a Transmission Upgrade? by writer Sep 22, 2007 (5:20 pm)
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"? Replies to this message: writer (Sep 26, 2007 12:24 pm) writer (Oct 01, 2007 2:57 pm)

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