Bucking/Jerking at Low Speeds When Cold

[22_Mich_Mav]

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[Carbonized Nate]

After a bit more logging and testing changes, I'm pretty sure it's the torque converter. I got the weird 4th gear RPM dip to go away, which was the torque converter, and I was able to log the jerking today as well, which also looks to be the torque converter. I was able to get it to show in higher gears, so I will have to adjust based on the shift scheduling of done.

My 10R80 in my Ranger sucked from the factory as well. I enjoy it a lot more since I tuned it.

What did you use to tune that out?

 

[Carbonized Nate]

Also I know this is an old thread but does anyone experience this when in stop and go traffic on the highway

 

[Automan21]

I know people say new cars don’t need warming up but I’ve done it to all my cars. Automatic/manuals, I let idle after start for at least 5-8 minutes.
I mean does anyone wake up from a deep sleep and run a marathon lol.

 

[Automan21]

I experience the same with my AWD 4K. Terrible in traffic as well even after warming up. Seems to hunt for the right gear all the time.

Try it in sport mode. It helps a bit, holds the gears a bit more instead of it always searching for the right gear.

 

[Cancunbadlands]

Sport mode is the answer

 

[Carbonized Nate]

Try it in sport mode. It helps a bit, holds the gears a bit more instead of it always searching for the right gear.

Yeah I have been driving in sport alot, its not perfect tbh but helps a bit, ive done all the fluids on this car and it seems like everything is in good shape so must be normal.

 

[Tbone289]

I don't experience bucking/jerking at low speeds at any temperature, so I can't speak to how normal it is.

I suppose others are in different situations where they're driving at low speeds more than I am while the transmission is cold though. I'm usually only driving across a short driveway or small parking lot before getting up to road speeds

 

[HeyBales]

I've never had a tranny that warmed up by merely idling the engine long.
Tested on the latest 2005 Rav4 on some brutal mornings - extra time for engine didn't prevent the tranny from showing it was still very cold.
Years ago I took the advice to let the ICE get that 30-45 seconds until the high idle subsides - and then actually start moving slow.
Now that gets the transmission warmed up.

That's no where near a wake up straight to running a marathon. My driveway isn't onto a highway at least.
That's a wake up to a roll, then crawl, then walk - easily within 3-4 min it's helped the shifting which is now fine on the brutal mornings. I figure if below 0 that's all that's needed, regular days are even better.

 

[Carbonized Nate]

I don't experience bucking/jerking at low speeds at any temperature, so I can't speak to how normal it is.

I suppose others are in different situations where they're driving at low speeds more than I am while the transmission is cold though. I'm usually only driving across a short driveway or small parking lot before getting up to road speeds

Depends on how you drive it tbh but this is a pretty well established issue on mavericks.

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