Transmission on stopping, makes a thump

I took it to the dealer and he said its normal. Anyone out there with experience on this?

When I come to a stop, the transmission sounds like its dis-engaging or something. It doesn't appear to be causing an issues, and its been doing it the 7 years I have owned it, but I just want to know if anyone else out there has seen/heard this type of behavior?

1999 Tacoma, AUTO trans, 4x4 2.7liter

 

Is it the tranny, or the dreaded Tacoma axle wrap?

 

I have a theory that I have been testing. I believe it is the transmission shifting down into 1st gear when you completely stop. To test my theory, I shift into neutral as I am stopping. After I stop for a second or two I shift the transmission from neutral into drive. I had been able to repeat the same feeling. And basically satisfied myself that it is normal downshifting.

 

Thanks for the responses everyone. Like I said its been doing this for almost 7yrs without issue. More of a worry really. BTW what is Tacoma axle wrap?

 

Have you ever done a burn out and felt the rear end hop? That is caused by axle wrap. The leaf springs bend/twist under torque and spring back into shape causing this jumpy feeling.

 

I am only seeing this behavior when I stop, not on 'take off' I am starting to believe its more of dis-engage than anything.

Again thanks to all for the responses.

 

If you are interested in finding out more about what folks here refer to as axle wrap, there has been a lot written about this topic. Here are some interesting threads, and a good place to start.

http://www.tacomaworld.com/forum/1s...rward-when-auto-trans-shifts.html#post1900827

http://www.tacomaworld.com/forum/1st-gen-tacomas/108316-goodbye-axle-wrap-mod.html

http://www.tacomaworld.com/forum/1st-gen-tacomas/104847-damage-wear-axle-wrap.html