Last post on Nov 24, 2012 at 8:42 PM
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Pontiac Montana, Pontiac Montana SV6, Van
#24 of 71 Re: Pontiac Montana transmission problem [fclay]
May 28, 2007 (10:39 am)
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?
#25 of 71 Re: Whinning Transmission over 60mph [montana2001]
Jun 02, 2007 (7:17 pm)
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.
#26 of 71 HELP WITH 97 PONTIAC MONTANA SHIFTING MYSTERY
Jun 05, 2007 (5:02 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 71 slamming into gear
Jun 06, 2007 (7:15 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!
#28 of 71 transmission problems
Jun 21, 2007 (7:49 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!!!
#29 of 71 Re: transmission problems [harleyvan]
Jun 22, 2007 (9:14 am)
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.
#30 of 71 Re: slamming into gear [oneeye1977]
Aug 02, 2007 (7:19 am)
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 71 Re: Pontiac Montana transmission problem [fclay]
Aug 03, 2007 (9:42 pm)
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.
Let me know if you find solution .
#32 of 71 Re: transmission problems [battleaxe68]
Sep 14, 2007 (6:46 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 71 Re: slamming into gear [oneeye1977]
Sep 19, 2007 (9:19 am)
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?