2018 Chevrolet Colorado: harsh or hard shifting

Filed Jul 6, 2025 · Transmission · LA

Clunking sound coming from rear end upon normal acceleration. When I take my foot off of the brake pedal, and depress the gas pedal, A loud clunk appears to come from the differential. If I coast first and then depress the gas pedal, it is not as pronounced. When you slow down to make a corner, and resume speed exiting the corner it is also pronounced. It should be noted that I am a safe adult driver (safe driver module installed in truck) and have 35,800 miles. My truck has always been serviced by my Chevrolet dealership; I am an older gentlemen and never drive recklessly. I'd like to think the rear differential should not be making a clunking sound at this point in its history

Filed May 2, 2023 · Transmission · CT

clunking in the transmission, when slowing down it feels like you got rear-ended. Then when accelerating from a stop the transmission seems to slip and then catch and then engages and shoots you forward, feels like it surges forward. TSB to replace the transmission fluid was done at about 18k miles, it didn't fix its still doing it now. It did it since day one from the factory and the TSB didn't correct it.

Filed Jul 30, 2020 · Transmission · 80,346 miles · KY

My 2018 chevrolet zr2 started to hard shift between first and second gear. It also sounds like it is running over rumble strips when driving between 50-75mph. When I researched this issue, I found thousands of issues online that matched this problem 100 percent. It is called the chevy shake or the gmc shutter. Mind you, the dealership verified that they have been sent kits from gm to correct these issues. It's called the tcc shudder.

Filed Aug 8, 2019 · Transmission · 100 miles · NC

Transmission has horrible shifting. Hard shifting at low speeds and when decelerating (feels like I was rear ended). Torque converter was replaced. From low speed, it doesn't downshift to accelerate unless the pedal is floored. Also, there is hesitation/pedal lag from a standstill, which makes it unpredictable when trying to pull into traffic. That part is a real safety convern.

Filed Apr 26, 2019 · Transmission · 2 miles · CA

Hard shifting when you accelerate in the first two gear and hard downshifting when stopping.

Filed Mar 13, 2019 · Transmission · 5,000 miles · FL

Hard/rough shifting up in gears and same down shifting in gears. Shaking/jerking/shuddering at speeds apx. 20-70 MPH. Transmission can down shift so hard, at times, it feels like someone hit your from behind. Wants to stall/slip shifting up in gears. Seems to have too much free play in driveline while sitting still shifting from drive to reverse. Makes a clunk sound.

Filed Nov 18, 2018 · Engine, Transmission · 18,000 miles · OH

I have a 2018 chevrolet colorado lt 4wd crew cab. Multiple times on a cold start the engine is misfiring. The check engine like comes on, the vsa, and t/c lights all come on and a notification on the dash saying stabilitrak is disabled. The vehicle shakes terribly. The check engine light will flash and then go solid. I am an automotive technician. I know that a misfire should set a hard dtc. When the vehicle is turned off and started several hours later there is no check engine light or any other light on. The dealership in marysville, oh had my truck for 3 days and told me they cleaned a bunch of terminals at several connectors. Whatever that is supposed to do. They said they started the vehicle several times after and everything was good. The next day after I picked the truck up, it did the same exact thing! Extremely frustrating! I know a continuous misfire let's unburned fuel into the catalytic converter which leads to premature breakdown of the catalyst. So my question is what is being done about these issues? Another issue is with the transmission. On a cold start there is a clunk noise. Then when you are driving at cruising speed and you let off the throttle and depress throttle again there is a shudder. Also, when you come to a complete stop the vehicle tries to jolt forward. This is extremely concerning especially on a vehicle with roughly 18,000 miles on it. This needs to be addressed promptly!!

Filed Nov 8, 2017 · Brakes, Transmission · 500 miles · CA · 2 injuries

I had truck stationary parked on a slight incline on a dirt road for about 5 minutes when I heard a odd sound like "arrrrr clunk" and my car rolled down a hill. I had my car on park while on 4low with the engine off. I did not have my parking brake on though but the incline was so slight I feel I did not need it. My truck was not loaded with any extra weight or anything to cause it to roll down the hill. I truly believe I am not at fault for this happening it is a brand new car how could this happen? Prior to this I was not doing anything extreme to damage my car in any way. Something must have failed on my truck.