Automatic Transmission "thump"?

TexasChuck

When cold, right out of the garage, sometimes only, I hear and feel a thump when stopping, almost stopped, downshifting into 1st. Anyone have any knowledge on this? 2014.... 15500miles.

Trips

The 7AT is notorious for doing that.

The simple fact they are always looking for the higher gearing to get better gas milage is another annoying thing.

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Wonka2581

I would avoid downshifting into 1st gear.. I also have a 7at and never downshift into 1st. Lowest I'll go is 2nd.

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"I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

FPenvy

soooooo recently mine has developed the "thump" from 3 to 2.

i drive 99.9% in manual mode. i shift every gear except 2 to 1.....never downshift into 1st. let the car do that on its own.

however sometimes i will also let it downshift from 3 to 2 on its own at low speeds coming to a stop.

now from 3 to 2 if the car does the shift it thumps. BUT when i do the 3 to 2 shift manually on the shifter or paddles there is no thump.

i also got scared that i blew something so i did a tranny flush and it made no difference in the thump EXCEPT the thump only happens when the car is warm and operating temp. cold temp beginning of the drive the 3-2 auto downshift feels normal.

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

Wonka2581

Have you taken it to the dealer? Have them look at it?

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"I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

FPenvy

i let the dealer do the fluid change since i don't have the specific tools to preform that since it's a sealed system and you gotta drain, fill a little, run it, fill a little, run it, etc...

i never ever let the dealership touch my car. well except the warranty steering lock they replaced. obviously couldn't do that on my own lol

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler