Solving SHUDDERING 8-SPEED TRANSMISSION on 2018 Chevy Colorado

Today Derek talks about a recent project we've done in our shop on a shuddering transmission in a 2018 Chevy Colorado. We flushed & replaced the transmission fluid twice before finally consulting local professionals. We hope that this video is helpful to you by sharing our own experience & conclusion of this problem! Thanks for Watching! Subscribe, Like & Share! We Appreciate Your Support!

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[a_Name_Here]

I am so glad I found this video. My 2019 Canyon has 137, 000 miles from a lot of traveling. It developed a shudder that hit around 1800-2200 rpm. Local transmission shop tried to get me to do a rebuild for $5500. Then I found this. Took it to the dealer for the complete flush and the shudder is gone. They also told me that there is no reason for a rebuild at this time. I was almost ripped off. Thank you for this info!!

[JeanSantana]

Great video, straight to the point, no bs.

[XxTxITxX]

The GM flush with new fluid helped get rid of my shudder too! got it done around 45k miles. At 81k now around 3 yrs later without any new issues.

[redleg]

My 2018 Silverado with the 5.3L V8 and the 8-speed transmission has been shuddering ever since I bought it used earlier this year. I called my mechanic and he has worked on several of these torque converter issues with GM transmissions. He says the best, and only way to fix it permanently is to have the torque converter replaced and the transmission flushed, then add fresh transmission fluid. I am having this done right now. I'm so glad I bought the extended warranty when I bought the truck!

[Schwerpunkt]

I just realized im very late to the party here but something you didn’t mention is that the transmission controller needs to be reset and then driven a couple hundred miles to properly affect the fix. Disconnecting the battery will reset the transmission controller and driving it 200 miles gives the transmission time to “learn” how to shift correctly and remain stable at those junctions between up and down shifts, and overdrive torque converter lock.

[Bdawg.]

I had the same problem with my 2019 Colorado and the proper flush did fix the shudder problem as well.

[TheMovement]

I have a 2018 camaro that had this issue. i took it to Chevy, and they did 3 full flushes, and it's been running smooth ever since then. Based on the research i did, apparently, the OEM transmission fluid Chevy used out of the factory was not formulated properly and was pulling moisture out of the air. This explained why doing a full flush using their machine that can pull everything out fully works so well.

[Jerkyking]

My 2019 8 speed developed the "Shutter" at 59870 miles. I attempted to get GM to perform the Flush under warranty and took it in. Service told me it was much worse and they completely rebuild the Transmission from valve body, clutch packs to torque converter. Work and part delays took 4 months, so I racked up 7500 miles on their loaners. I was given a 24 month 24K miles warranty on the work. I'm about 5K miles in, other than the notable GM hard 1st shift (knock wood), so far so good.

[jackbarrier]

Bought my 2019 Canyon Denali new with 23 miles on it in November 2018. At 300 miles I started noticing the shutter. Took it back to the dealership, described the issue and they immediately knew what it was. A complete flush and refill with the new Mobil 1 trans fluid and no more shutter. 6895 miles later with fingers crossed. I love my truck.

[paperbagchampagne]

Just bought a 2018 Colorado Z71 with 45k miles. Sure enough during the 45 minute drive home from the dealership on the high way going 50-80 mph, I noticed the shudder, it was light at first and gradually got more aggressive. Terrible feeling after just dropping $6k down on it. It came with a 6 month warranty so I'll be taking it to get the flush done. UPDATE: It's been about 1 year since I made this post, the dealer initially only did a flush and it still shuddered. Then they replaced the torque converter and it's been fine ever since, currently at 62, 144 miles.

[Bassrespecter]

My ‘19 colorado did this at ~35k. Did the GM flush and fluid replacement (under warranty thankfully), and had zero issues until ~68k. Not sure if replacing this fluid every 30k would’ve stopped this from happening, but the flush from the dealership ultimately didn’t prevent the shudder from coming back.

[Spkrfrk]

I have a 2018 Colorado 2wd with 108k miles on it. I've been lucky to never have the transmission shudder throughout its life. I believe I helped combat this though by doing transmissions flushes at the dealer every 30k miles throughout its life so far. Only part I have ever had go bad so far on the truck is the thermostat/temp sensor. I would definitely recommend having the dealer do the flush because of the system being able to pump all the old fluid out.

[jdjd]

2019, Colorado 3.6 4x4. I have the shudder issue. Gm flushed it twice and the shudder stayed. I doubt they followed the gm service bulletin though. It says get the transmission fluid temperature to 145 before draining. The transmission temperature Guage has never gone over 130 since iv owned it. Pulling trailers, I traffic in the summer etc. I think that's a lot of the problem, the fluid never gets hot enough to evaporate the moisture out. My truck has the tow package and transmission cooler. I only has 43000 miles now but during covid an accident damaged the bed side. Due to the parts shortage it was totalled by the insurance company. We found a salvage bed the exact color (white, ) and swapped the bed. Even gm service can't see where it was wrecked. But the Vin voids gm warranty.
I have a scan tool so I did a scan and it shows multiple misfires. No MIL light though. So iv ordered new coil packs and spark plugs. We have a 2018 terrain with an 8 speed front wheel drive transaxle. It also had a shudder. Ir also has misfire codes and no MIL. I replaced the could packs and plugs in it they fixed the misfire and shudder issue.
So I'm going to do the same with rhe Colorado. If the shudder is not fixed I'll take it to a different dealership for another flush. Also I dud add a bottle of Shudder Fix and it made no difference

[pablomata]

Same thing happened to my 2018 Denali did the flush it fixed it kept it for another year no problem but got rid of it anyways 50k miles

[TravisByrd]

I had the GM service department do the recommended flush. It definitely helped for a while but the shudder can back after a while.

[stevezimmerman]

I had the same problem with my 2018 GMC Canyon. On a grade it would shudder before it would shift down. I took it to a GM/Chevrolet dealer and he said " let's try the easy fix first". He put the high end trans fluid in it, same thing what the Corvettes and other sports cars use. He told me that I may have to run it for some miles before it would make a difference. I noticed a difference right away. It's been shifting smoothly ever since - probably 20, 000 miles ago.

[rickmcmhan]

I have a 2020 colorado z71 4x4 no shutter but if it starts I will do the flush thanks for the input

[mrblanche]

My 2018 Colorado developed the shudder at about 42, 000 miles, which is just about the average point to happen. I was well-acquainted with the problem, so I took it to my dealer. They did the complete flush with the special machine (which all dealers were required to buy) and the shudder disappeared and has never come back. As you said, the problem appears to be the original fluid apparently absorbs too much water (which it is designed to do, just like brake fluid) and could not maintain sufficient pressure on the torque converter clutch.

[bkv]

I have 18 silverado with shudder. Did new tires, bearings, cv axle and no one could figure it out. My shudder comes and goes and only lasts a few seconds. Does that match your experience or was shutter constant? I mostly notice around 25mph

[jimschreiner]

My 2018 started doing it at 56k and when I took it to the dealership they told me there was a service bulletin on the issue. They did a good clean and flush, put the right tranny fluid in it and I'm at 88k now with 0 problems.