Automatic Transmission "thump"?

TexasChuck · 01-20-2016, 08:07 AM

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 · 01-20-2016, 10:01 AM

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.

Wonka2581 · 01-20-2016, 10:35 AM

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

FPenvy · 01-20-2016, 10:39 AM

Quote:

Originally Posted by 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.

Quote:

Originally Posted by Wonka2581

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

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.

Wonka2581 · 01-20-2016, 10:41 AM

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

FPenvy · 01-20-2016, 10:43 AM

Quote:

Originally Posted by Wonka2581

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

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

01-20-2016, 08:07 AM	#1 (permalink)
TexasChuck Track Member Join Date: Oct 2012 Location: SE Texas Posts: 556 Drives: 2014 Black Cherry Co Rep Power: 14	Automatic Transmission "thump"? 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.

01-20-2016, 10:01 AM	#2 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	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. __________________

01-20-2016, 10:35 AM	#3 (permalink)
Wonka2581 A True Z Fanatic Join Date: Nov 2012 Location: Chattanooga, TN Posts: 3,083 Drives: MY WIFE CRAZY.... Rep Power: 2612	I would avoid downshifting into 1st gear.. I also have a 7at and never downshift into 1st. Lowest I'll go is 2nd. Felix 808 and MagmaRed370z like this. __________________ "I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

01-20-2016, 10:41 AM	#5 (permalink)
Wonka2581 A True Z Fanatic Join Date: Nov 2012 Location: Chattanooga, TN Posts: 3,083 Drives: MY WIFE CRAZY.... Rep Power: 2612	Have you taken it to the dealer? Have them look at it? __________________ "I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
"Automatic" OBDII real-time scanner	MacCool	Engine & Drivetrain	2	06-02-2015 08:47 AM
[WTB] One "plug" " blank" for heated seats.	synolimit	Parts for sale (Private Classifieds)	3	10-21-2013 09:22 AM
I guess this will be my "build thread" or..."journal?"... atx370z	atx370z	Member's 370Z Gallery	15	09-15-2010 12:10 PM
"Dancing with the Dealer" with the 40th - hope to be in the "New Owner" section soon	optiontrader	New Forum Member	8	08-03-2010 11:37 PM