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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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#52 of 59
Re: 2000 Montana - Transmission Hard Shifting [kennie] by shampooguy
Mar 29, 2009 (5:22 pm)
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Replying to: kennie (Feb 12, 2009 3:16 pm)

I had the same issue with my '05, hard shifting after 10 minutes of driving. I researched it on automotiveforums.com, and there was a member there that installed a $30 shift kit from zzperformance.com on his van, and it stopped the hard shifts. I did the same, flushed with Dexron VI fluid, and all is well.
#53 of 59
Re: 2000 Montana - Transmission Hard Shifting [shampooguy] by kennie
Mar 30, 2009 (9:18 am)
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Replying to: shampooguy (Mar 29, 2009 5:22 pm)

VERY curious about the 'shift kit' you instaleld... can you tell me more about it, where I might find it, how you installed it, how long it took and what you think it actually does? Thanks !
#54 of 59
Re: Hard shift sometimes [pacecar68] by triplezero1
Jul 25, 2009 (3:06 pm)
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Replying to: pacecar68 (Jul 18, 2008 9:28 am)

Hi, i have a 2000 Montana with 35000 miles with the very same problem you have have you herd of a fix for this or what the problem might be ?
#55 of 59
Re: Hard shift sometimes [triplezero1] by spike99
Aug 02, 2009 (8:30 am)
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Replying to: triplezero1 (Jul 25, 2009 3:06 pm)

For some good info on why the 4T65E transmission known problems, surf:
 
http://www.tripleedgeperformance.com/4T65E_Transmission_Info.html
 
On a different forum, a person installed a "shift kit" and his van's transmission shift slippage was eliminated. Using Google, search for "4T65E shift kit" and lots of info appears. Well worth searching this area as well...
 
Also... My local transmission specialists recommends transmission ATF aux cooler (rated for 5,000+ lbs trailer) be installed on all GM 4T65E transmissions. Even if van is only used for "soccer parent" (and non-Towing) driving conditions. From his experience, the 4T65E does NOT like heat. Especially from city stop/go city driving on a hot day conditions. He told me the LPD (Low Pressure Drop) aux transmssion design (like Tru-Cool and Hayden brands) are the best.
 
If wondering, I installed the Hayden LPD aux cooler on my '09 Montana van. Cost me under $150 (CDN dollars) in needed materials. And, I installed it myself - to keep the cost even lower. re: http://www.makcotransmissionparts.com/OC-1678.html
 
Hope this helps....
 
.
#56 of 59
2004 to 2000 swap by dwayne8
Nov 17, 2009 (11:54 am)
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My tranny went out in my 2000 van. I bought a used tranny out of a 2004 and installed it. The man said it would bolt right up, It did. But it will not shift into overdrive. Does this transmission take a different computer? I noticed the plug to the tranny has more pins than the original. Any thoughts?
Thanks
Dwayne
#57 of 59
Re: 2004 to 2000 swap [dwayne8] by disapointed1
Nov 17, 2009 (6:44 pm)
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Replying to: dwayne8 (Nov 17, 2009 11:54 am)

I purchased a 2009 montana in march of this year..and I took it back to the dealer when it was two weeks old..when you take your foot off the break before your excelerate it shakes or ( idles rough) the dealership tells me it is the transmission and it is a operational charactersitc of this van. Does anyone else have this problem or know of anyone with this? It is high stall torque converter..and they started using this part in the late 2007 models. They tell me it is in all these vans but I'm not convinced. Please let me know!! Thanks
#58 of 59
Re: 2004 to 2000 swap [disapointed1] by spike99
Nov 19, 2009 (3:51 pm)
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Replying to: disapointed1 (Nov 17, 2009 6:44 pm)

Like you, my wife (and I) bought a 2009 Montana EWB van as well. Bought in on March 30 2009. Since day 1, our van's movements has been smooth. Smooth ask silk when slowly taking off from idle and smooth as silk when slowing down, then speeding up again (after driving through the school zone). Other then battery replacement, 3rd brake light replacement (which was both under warranty), I've been very pleased with our 2009 Montana van. Especially pleased with its smooth idling and smooth take off behavior. re: No vibrations at all. Actually, I prefer the smoother feeling of this 2009 van when compared to my wife's 2003 Buik FWD "run about" 3.4L vehicle. So far, I'm glad we bought our 2009 Montana 3.9L van.
 
Hope this helps...
 
.
#59 of 59
Re: 2004 to 2000 swap [spike99] by disapointed1
Nov 23, 2009 (7:24 pm)
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Replying to: spike99 (Nov 19, 2009 3:51 pm)

Thank you that helps alot. The dealership keeps telling me they all do this and they can't fix the problem. I think I just have a bad one in the bunch, and I want them to fix it or replace it. But I wanted to know if all the montanas were doing it.
Thank you for taking the time to reply!

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