Hard shifts

[Hockeyguy]

Hello everyone
I am new here
Hope everyone is well.
I joined this forum to get help on some concerns I have with my 2017 tacoma trd off road. I was wondering if anyone had experience with the truck hard shifting into first gear when stopping suddenly. It only happens when braking hard. I have had this truck for 4 years and it's always done this. Have taken to several dealers over the years with mixed results. Some saying they can't reproduce the concern and others saying it's a normal driving aspect of the truck. It drives me nuts and was wondering if I can do something about it? Any help would be much appreciated.

 

[B-Man]

Welcome! Theres a transmission update the dealer can do.

 

[406Camper]

Yup. The dealer update fixed most of my hard shifting.
I believe it is TSB 0062-18 or 1258-18.

Recall - Latest TSB Update (Fixed Shifting)

What’s the scoop with this new TSB update that’s supposed to fix gear selection/shifting? Has anyone here did this update and if so, notice anything? Thanks!

tacoma3g.com

 

[Hockeyguy]

Had that tsb done. Didn't change that issue. Had my truck recently tuned and that has made it worse. Although the shift points are so much better overall with the tune it still hard shifts on sudden stops. I spoke to the tuner and he said his truck a 2016 tacoma does the same thing.

 

[B-Man]

If there's others noticing the same hard shift then probly just the way it is. If you need, you can get a hold of Toyota Corporate and file a claim and see what they say. At least have it on file with them in case something with your tranny goes. Then again, your tune may throw everything out with Toyota.

 

[Bird dog]

Welcome aboard. If the tune didn’t help or the tsp update. I think your stuck with it.

 

[Hockeyguy]

Already filed a complaint. Had to force my dealer to do the tsb because they refused to do it. Had to get corporate involved with a case number.

 

[B_Lui]

I've noticed the harder I brake the more aggressive it seems to downshift. I wouldn't call it hard downshifts. The cool thing is when going down a big hill if I start braking it REALLY downshifts to let the engine help. I thought that was pretty cool.

 

[B-Man]

Already filed a complaint. Had to force my dealer to do the tsb because they refused to do it. Had to get corporate involved with a case number.

Sounds like you've done all you can do......drive it and enjoy the Taco!

 

[Dirtboy2009]

I have a 2016 and mine does the same thing, but I don't attribute it to hard down shifting. I figured it was a sort of axle wrap that happens when hard braking.

 

[Biohazard]

I've had a 2016 (trd off-road) and now a 2020, and both do a downshift when braking. Haven't thought it was bad though, just a quirk of the truck.

 

[bonifacio]

Have you reset/clear TCU values?

 

[cryptolyme]

mine was doing the same thing and it was low on fluid. only about 1/3 of a quart but made a significant difference adding fluid.

 

[Meclizine]

Could this be from the torque converter locking during coasting? I'm assuming they do that even with a tune.

 

[cryptolyme]

it does do that a lot. if you use an obd reader you can see that it goes into open loop whenever you let your foot off the gas