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05-21-2019, 11:55 AM
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#1
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Registered User
Newmar Owners Club Appalachian Campers Freightliner Owners Club
Join Date: Feb 2017
Location: Midlothian, VA
Posts: 4,774
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Colorado/Canyon 8 speed Automatic engines - transmission issue
I have a 2017 Chevy Colorado and really enjoy it. First pickup ever owned, got it only for the new RV lifestyle (two years ago). A few weeks ago heading up the interstate I felt/heard a rumbling noise, it's not the tires, it's something in the drive train. On cruise control or anytime applying power to accelerate or maintain speed. Some describe it as if it sounds like going over rumble strips.
My Colorado is in the shop today, this is a known problem on the 8 speed automatics. The issue is something with the transmission fluid used at the factory assembly, I think it was mentioned it attracts or forms moisture which causes this problem. The fix is the flush the transmission fluid and replace it with something different they are moving to and moving away from what was used at the time of factory delivery. Mine is covered under warranty, there is a bulletin out within GM about this.
If you go on the highway on cruise control and feel a shutter at times, take it in ASAP. I've researched this on the web and have heard stories of torque converters and transmissions. I'm told I will feel the fix immediately and it will take about 200-300 miles to see if the issue is in fact fixed once the transmission fluid propagates completely etc. If it continues then it goes back in the shop and my guess is the next step is going to replace a torque converter or transmission.
FYI
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05-21-2019, 07:18 PM
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#2
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Senior Member
Join Date: May 2018
Posts: 823
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Thanks Neil, I’ve the Canyon version with the 8 speed and will
keep an open ear for noise.
__________________
John, Sharon & (Luna)-Blk.Tri.Australian Sheppard
2022 Newmar LA 4551, 2019 DS4018 Sold
21' Tahoe Z71, Demco base, Avail bar, Air Force 1.
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05-21-2019, 07:28 PM
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#3
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Registered User
Newmar Owners Club Appalachian Campers Freightliner Owners Club
Join Date: Feb 2017
Location: Midlothian, VA
Posts: 4,774
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I've got about 13K miles on my for reference. It just started doing this a few weeks ago.
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05-21-2019, 07:29 PM
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#4
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Senior Member
Join Date: Oct 2012
Posts: 498
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Quote:
Originally Posted by NealC
I have a 2017 Chevy Colorado and really enjoy it. First pickup ever owned, got it only for the new RV lifestyle (two years ago). A few weeks ago heading up the interstate I felt/heard a rumbling noise, it's not the tires, it's something in the drive train. On cruise control or anytime applying power to accelerate or maintain speed. Some describe it as if it sounds like going over rumble strips.
My Colorado is in the shop today, this is a known problem on the 8 speed automatics. The issue is something with the transmission fluid used at the factory assembly, I think it was mentioned it attracts or forms moisture which causes this problem. The fix is the flush the transmission fluid and replace it with something different they are moving to and moving away from what was used at the time of factory delivery. Mine is covered under warranty, there is a bulletin out within GM about this.
If you go on the highway on cruise control and feel a shutter at times, take it in ASAP. I've researched this on the web and have heard stories of torque converters and transmissions. I'm told I will feel the fix immediately and it will take about 200-300 miles to see if the issue is in fact fixed once the transmission fluid propagates completely etc. If it continues then it goes back in the shop and my guess is the next step is going to replace a torque converter or transmission.
FYI
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Check out "Coloradofans.com" A must for Collie and Canyon owners
a lot of posts regarding the 8 speed tranny issues as well as other Colorado/Canyon fun stuff
__________________
Life's A Long Song
2008 Fleetwood Terra 33L, SCT, Safe-T-Plus, Trac Bar, Koni, Banks Stinger, Sumos, '16 Canyon Duramax Toad
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05-21-2019, 10:31 PM
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#5
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Senior Member
Join Date: Apr 2013
Location: Chilliwack BC
Posts: 406
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Yes this has been on most of the Facebook pages for sometime now.
From people getting new transmission and torque converters.
A few have had the updated fluid and did it has been fine so far.
Kinda glad I have a 16 with the Duramax
Good luck with the op truck hope it solves your issue.
__________________
2016 GMC Canyon 2.8 Duramax
Holiday Rambler 187qb.
Jason&Shantelle&Bella,the Weimaraner.
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