is it normal for tranny to shift slow/a bit jerky when cold ambient temps?

[meep]

Sounds normal. My f150 transmission freaks out a bit with sudden temp changes. Idk about the RAV, but the ford keeps an adaptive table of shift behavior and constantly updates its fine tuning. A rapid temperature change sends it beyond its last few hundred miles of adaptives (my guess).

@apollo18 are you using a synthetic fluid like Maxlife or the oem fluids?

 

[apollo18]

Sounds normal. My f150 transmission freaks out a bit with sudden temp changes. Idk about the RAV, but the ford keeps an adaptive table of shift behavior and constantly updates its fine tuning. A rapid temperature change sends it beyond its last few hundred miles of adaptives (my guess).

@apollo18 are you using a synthetic fluid like Maxlife or the oem fluids?

Yes full synthetic! Hope it gets better in next few days

 

[D60]

My 6R140 is sluggish on the first 1/2 mile when cold (my dirt road). But it's the first year of the trans and high mileage at this point. Regardless, it always performs better once warm

 

[apollo18]

did some more testing today, my original estimate of 6-8 mins is overblown due to the fact i lately havent done much stop and go driving, i usually have 1 or 2 full shift of most of the gears before im on the highway

however i paid attention today on a 50f morning

1-2 shift was good, i doubt anyone else would notice or care if they drove the car
2-3 shift was the same
3-4 shift was most noticeable and felt lagged and delayed

never got to try the 3-4 shift consectively as either i slow down at a light before the 3-4 shift would happen the next time or im already on the highway. all i know is 5 mins later if i retry any of the shifts it feels good as normal

would feel really guilty if its low on fluid as i wont have time to get it checked for another 2 weeks

 

[dbias]

I’d say it’s the ECU/TCU using a different shift approach due to the slightly colder conditions.
In my area below freezing for weeks is nothing unusual and all my vehicles shift differently than in the summer. My old F350 diesel was a whole thing to get going in such weather. Even pulling the gear selector down out of park took considerable effort when really cold.

 

[paulo57509]

The Highlander is jerky immediately after 1-2 shift when cold. I don't know if it's the transmission or fueling. I suspect fuel but I really don't care. I don't even know if it IS a problem. It does this once and then it's gone the rest of the day.

Like the A650E in the LS400. Super delayed 2-3 shift when cold. After it makes the shift once, it doesn't so this again until the next cold start. It appears that all LS400's do this. I haven't noticed this in the LS430 (same trans).