Jump to content

2018 with a stutter going uphills


Recommended Posts

I have had my 2018 LTZ 5.3/6spd for 9 days now, its my first GM product since 2012.  I see lots of people on here complaining about the stutter during acceleration but I am seeing it a little differently.  I drive 50 miles a day on the interstate at 70mph.  When I hit hills it will switch seamlessly from v8 to v4 and then at random times it feels like a dead miss a couple of times and then it will normally downshift and then its fine the rest of the way up the hills.  It is really driving me crazy for a brand new truck to be doing this.  I love everything else about the truck but if it keeps this up I may light it on fire.

IMG_4292.jpg

Link to comment
Share on other sites

Is it lugging in v4 which causes the stutter then changes to v8 and it’s fine? You can try m5 for 6 speed or m7 if 8 speed which disables V4 mode. But at 70mph you prob want it in 6th or 8th What gears are in your truck? 

Link to comment
Share on other sites

It’s well after it goes back to v8. My truck is a 6spd with 3.42s. Once it downshifts into 5th it’s fine, it’s just the time before that when it’s trying to hold itself in 6th. It feels like a dead miss but I really think it’s transmission/converter related.


Sent from my iPhone using Tapatalk

Link to comment
Share on other sites

It sounds like you’re throttle input is at the “sweet spot” for the trans to hesitate in downshifting as it climbs the hill. You know you’re going uphill and that you will be continuing to travel uphill. The computer in the trans is only dealing with actual data at the moment it receives it. If the trans downshifted every time it sensed increased resistance (going uphill, etc...) these forms would be filled up with people talking about how the trans shifts too much or burns out clutch packs too quickly.

The simple fix is to increase the trotted input to force the trans to downshift faster. This will get you into the correct gear quicker and the ride will likely be a lot smoother too.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.