Last post on Feb 04, 2011 at 2:55 AM
You are in the Chevrolet Uplander
What is this discussion about?
#3 of 12 Re: Hard upshifts [05chevupl]
Jan 05, 2010 (4:35 am)
Without getting a Service Engine Soon light, I'm not sure if any codes are being stored. No advice yet.
#4 of 12 Re: Hard upshifts [uplanderguy]
Jan 10, 2010 (8:43 am)
Here's a thought: The Venture also used the 4T65E trans and would have problems with sporatic hard upshifts when the PCS (pressure control solenoid) in the trans was failing. Same symptoms as you describe. It also wouldn't throw codes when it was doing it.
Another symptom was that the trans would whine when it was doing the hard upshift thing...
Hope this helps...
#5 of 12 Re: Hard upshifts [442dude]
Jan 10, 2010 (8:49 am)
Thanks. How huge of a repair bill is that?
#6 of 12 Re: Hard upshifts [uplanderguy]
Jan 28, 2010 (3:04 am)
I had a new battery put in my vehicle the other day, and my harsh upshifts seem to have been replaced with a soft, slow, mushy 2-3 shift. Does that make any sense?
#7 of 12 Re: Hard upshifts [uplanderguy]
Feb 07, 2010 (1:12 pm)
I'm not a transmission expert but it seems weird to me.
Since you replaced the battery, you powered everything down b/c it had no juice...maybe it reset the PCM?
I'm no help here...
BTW - to answer your question (sorry so late) a PCS replacement is about $ 700-800 repair if that's what it turns out to be...
#8 of 12 Re: Hard upshifts [uplanderguy]
Feb 09, 2010 (1:01 pm)
As 442dude suggested, most likely you had reset the computer.
We were having a problem with the eject button of our DVD player in our Saturn Relay. It was suggested that pulling the fuse for the player would reset the player and correct the problem. I couldn't find the fuse panel, however the battery needed to be replaced with the same result. The DVD player seems to be functioning properly again.
#10 of 12 Hard Shifts
Feb 03, 2011 (8:50 pm)
I was told that my transmission needs to be replaced in my 06 uplander by the Chevrolet dealership. ($3350) Are they serious? They said the clutches are worn internally causing vehicle hard shifts. Anyone else having this problem?
#11 of 12 Re: Hard Shifts [upset15]
Feb 03, 2011 (11:58 pm)
For "specialized" items like transmissons, I would NOT listen to GM. Take your vehicle to a transmission specialist shop and ask them to investigate. And ask them about installing a rebuilt kit - if it needs a rebuild (instead of a full replacement). If wondering, I got a transmission for RWD GM vehicle rebuilt (with standard rebuilt kit) approx 4 years ago and it only cost me $900. Rebuilds are often much less cost then a "brand new" replacement task.
Also... I was told the 4T65-E transmission in many GM FWD vehicles tend to run hot. Too hot. Especially during hot temp day and stuck within stop/go traffic - while loaded down. My transmission specialist told me to install an aux transmission cooler - rated to pull 5,000 lbs trailer (for my '09 Montana van). Thus, creating more "cooling" then factory. Cooler transmission (even if van only used as local "run about" vehicle) means longer life in the long run. The transmission cooler I installed is Hayden 1678, and its been working great since day one. re: http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=2&Product_- - - - - - - Code=OC-1678&Category_Code=hayden-transaver
re: http://i178.photobucket.com/albums/w251/Spike99-Pictures/Montana%20Van/AuxTransC- - - - - - ooler-UpperSupport-1.jpg
After you get the transmission fixed (sensor change or rebuilt with new kit), do install an aux transmission cooler as well. The Hayden 1678 for attached 5,000 lbs trailer works great in my wife's van. Especially on "hot blistering" summer days.
Also... Do ask your transmission specialist if the new Dexron VI ATF fluid should be used in your older GM vehicle. My one buddy installed this "much better" ATF fluid in his older GM vehicle and feels it's much better (better then its older ATF fluid). re: http://www.imperialoil.ca/Canada-English/Files/Products_Lubes/IOCAENCVLMOMobil_S- - - - - - - uper_Dexron-VI_ATF.pdf
Hope this helps as well...
#12 of 12 Re: Hard Shifts [upset15]
Feb 04, 2011 (2:55 am)
I'll tell you, I had hard upshifts when the vehicle was really warmed up (like after a long highway drive, then returning to stop-and-go traffic). I just had them replace the pressure control solenoid, which GM and my dealer did under warranty even though I was past the regular warranty. That did the trick for me. I had my dealer flush and refill the trans at 59K miles just as a precaution, and within three months started having the hard-shift issue. I would recommend not having a flush but instead a drain and filter change, then refill, too. I had been told by a local trans. guy that's reputable, that the cost of a pressure control solenoid replacement was about $500.
Sadly, I think the Uplander and its sibling vans have probably done more to hurt GM's image in owner's minds in the past five years than any single GM product in the twenty years before that. Add to that, that the Pontiac version was discontinued here after only two seasons, and the Saturn after three, and you've got awful resale value to deal with too. I truly cannot remember when GM bailed on a product so quickly as these.