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Buick Enclave Transmission Questions

18 messages,  Last post on Jan 12, 2009 at 8:06 AM

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#11 of 18 Buick Enclave Stalling in Mountains by mountianchic Aug 04, 2008 (7:59 am)
I just took my brand new Enclave up to the mountains for a family trip. It stalled 3 time going up the highway at about 7000 feet. We turned around and went home after that. I just took it in for service. Dealer says other Enclaves and Acadia's are having the same issue and they don't know what is causing it. Anyone else had this issue? I am not very happy with my new GM car having just traded in my 2003 Toyota 4Runner with 60,000 miles and NO issues in the mountains.
#12 of 18 Transmission ReProgram Bulletin # ? by gunga Nov 25, 2008 (11:20 am)
Have 2008 Enclave Can anyone point me to the Service Bulletin # about Re-Programming the Transmission. My dealer has never heard about the problem (small dealer) and has no idea as to what I am talking about.   The constant shifting is driving me crazy. Replies to this message: zman3 (Nov 25, 2008 11:47 am) orange1924 (Dec 08, 2008 7:30 pm)
#13 of 18 Re: Transmission ReProgram Bulletin # ? [gunga] by zman3 Nov 25, 2008 (11:47 am)
Replying to: gunga (Nov 25, 2008 11:20 am) I am not sure if this TSB has been updated or not but have them start with this. The main issue appears to be that this update does not show up under anyones VIN, you need to ask for it explicitly.   Good luck.   Document ID: 2177083 #08-07-30-022A: Hesitation or Flat Spot Between 56-80 km/h (35-50 mph) (Reprogram Transmission Control Module) - (Aug 1, 2008)
#14 of 18 Re: Transmission ReProgram Bulletin # ? [gunga] by orange1924 Dec 08, 2008 (7:30 pm)
Replying to: gunga (Nov 25, 2008 11:20 am) On the third trip to the dealer for the same problem they ended up programing the shift delay to a little higher RPM. About half way between stock and the tow/haul mode. I love it. It's a little more engine noise around 40 mph but the performance is much better overall. I hated that quick shift pattern that had the car dogging.
#15 of 18 by gunga Dec 09, 2008 (5:49 am)
OK, had my Transmission Re-Programed 4 days ago. Now I don't go crazy with the constant upshifts and downshifts. Milage seen to be down about .5 but it is will worth it.   BTW: Take the Document ID # to the dealer. My dealer/Service Guys had never heard of the problem.      Document ID: 2177083 #08-07-30-022A: Hesitation or Flat Spot Between 56-80 km/h (35-50 mph) (Reprogram Transmission Control Module) - (Aug 1, 2008)
#16 of 18 Transmission Shift Points by nealschwartz Dec 30, 2008 (11:57 am)
I drive two speed limit stretches every morning, one being 35MPH and the other 30MPH. My 2009 Enclave CXL AWD seems to lock at 4th Gear during the 30MPH zone, and 5th gear at the 35MPH zone. Even though I'm not accelerating it will not go up a gear. The problem is, unless I put on cruise control I may drop to about 33 MPH and the transmission will shift down. It's like there's a shift point between 33 and 35 that you get that shifts either coasting, accelerating, or decelerating. Every time you move between those speeds it shifts. My wife thought I was jerking the accelerator, stepping on it then letting go. Any fix known? It's like downshifting to slow down, but it's automatically done. Replies to this message: gunga (Jan 01, 2009 5:38 am)
#17 of 18 Re: Transmission Shift Points [nealschwartz] by gunga Jan 01, 2009 (5:38 am)
Replying to: nealschwartz (Dec 30, 2008 11:57 am) The fix to the downshifting problem is the Re-programming.
#18 of 18 Buick Enclave Sudden Acceleration by stagefam Jan 12, 2009 (8:06 am)
My 2008 Buick Enclave suddenly lurched forward as I was pulling into a parking space. My foot was not on the accelerator or the brake. Has anyone had a similar problem or have any ideas??

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