Transmission slip

[14SierraZ71]

Just curious if anyone has the same issue I've been having. So on the very first shift of the day from 3-4 my trans seems to slip into gear. After the initial run through the gears it shifts great every single time after that. I have real basic stuff done to my 14 Sierra..cold air intake, cat back exhaust and blackbear tune (yes the trans was tuned). It really seems to be temperature related because it gradually got worse the colder the nights get (I live in the northeast). And no matter how long I let the truck warm up before I drive it, it does the slip but only 1 time. Not sure if this is also related but the tuner said the torque converter locks after the shift into 4th gear.

[Dino76033]

I have a 2018 with the 8 speed and the same thing is happening to me but mine is 1-2 shift. It doesn’t really slip, more like stumbles between the 1-2 shift but like yours it only happens on the first shift when the transmission is cold. 

[JimCost2014]

5 hours ago, 14SierraZ71 said:

Just curious if anyone has the same issue I've been having. So on the very first shift of the day from 3-4 my trans seems to slip into gear. After the initial run through the gears it shifts great every single time after that. I have real basic stuff done to my 14 Sierra..cold air intake, cat back exhaust and blackbear tune (yes the trans was tuned). It really seems to be temperature related because it gradually got worse the colder the nights get (I live in the northeast). And no matter how long I let the truck warm up before I drive it, it does the slip but only 1 time. Not sure if this is also related but the tuner said the torque converter locks after the shift into 4th gear.

Check your MAF to make sure there is no oil from CAI or to see if it looks dirty. They will affect your transmission if not working properly.

[T-Town-Z]

On mine (5.3 w/6speed) it does this same exact thing, but only when I start the truck and depart from somewhere going forward. Mainly I notice it when I stop for gas and then pull away from the gas station after filling up.   I would describe it kind of like a quick flare/shift.  If I put it into reverse first, it never does it.

[Z45]

These vehicles are more computer than truck so weird anomalies are common.  Often times someone else driving the same vehicle will not experience the same thing.  That's why when you take it to the dealer, they say they can't duplicate the concern.

Edited January 4, 2019 by elcamino

[andyhaug]

The 6 speed does an air purge on the first 2-3 shift which causes a slip and sometimes a flare.  If you only see this on the first 2-3 shift it is normal.

[Slash L86]

On 1/3/2019 at 8:16 PM, T-Town-Z said:

On mine (5.3 w/6speed) it does this same exact thing, but only when I start the truck and depart from somewhere going forward. Mainly I notice it when I stop for gas and then pull away from the gas station after filling up.   I would describe it kind of like a quick flare/shift.  If I put it into reverse first, it never does it.

I always back out of driveway first and it does the pause on first shift when cold.

[Slash L86]

On 1/4/2019 at 5:21 AM, andyhaug said:

The 6 speed does an air purge on the first 2-3 shift which causes a slip and sometimes a flare.  If you only see this on the first 2-3 shift it is normal.

If it's normal why did it never occur on any other vehicles I've driven in the past 30 years?

May be normal for this trans, but doesn't mean it should happen if something wasn't going on with it. I suppose it's fine if they're no metal particles present during first rebuild. Really strange though.

[Sarah Land]

I have 2014 Chevy Silverado Lt 1500 4x4  transmission slipping and shifting hi and low like most who have committed. Wondering has anyone tried replacing the transmission oil pressure switch.

[Sarah Land]

I have 2014 Chevy Silverado Lt 1500 4x4  transmission slipping and shifting hi and low like most who have committed. Wondering has anyone tried replacing the transmission oil pressure switch.