Transmission - Uodate (1 Viewer)

[JustHere4Research]

Had my GX getting the brakes and hood flutter TSBs done and my dealer said transmission software update/fix is supposed to drop in November.


Hadn’t seen that date here yet unless I missed it

 

[Orzel]

We can but hope!

 

[JG550]

Was supposed to be July, now November. I won’t hold my breath.

 

[nartmot]

This is good intel so thank you for sharing. I hope it is correct. Unfortunately the fix has been a month away every month for the past few months.

 

[YellowLab]

Thanks for sharing

 

[GMan93]

What happened to July...

 

[YellowLab]

What happened to July...

I have no idea!!

 

[rapture ready]

Today I tried the idea from another transmission thread which is to disconnect the negative battery cable for 30 minutes. This is suppose to reset the transmission memory. After doing this and driving around I found no change in the jerky/clunky shifts while going slow through the neighborhood, in fact, it may actually be worse. Worth a try, did not lose any pre-sets or radio stations. Hopefully Lexus will come up with a solution sooner rather than later.

 

[Motown]

I took my OT in to get the hood flutter sorted out (finally). When I asked my service rep, he said the software update ETA was later this month (August). My dealer is located in Greenville, SC.

 

[powerofboom]

Had my GX getting the brakes and hood flutter TSBs done and my dealer said transmission software update/fix is supposed to drop in November.


Hadn’t seen that date here yet unless I missed it

thank you for sharing. I always thought they wanted to keep the revs in the "sweet spot", but the downshift can get tiresome during city drive

 

[rocksallday]

Asked my dealer the about the update when I came in for service last month, he said they have the update but won't release it until the EPA/CARB approve it. Apparently any such change needs to prove no or positive environmental impact prior to release.

 

[spiderjoe]

Asked our service advisor on the transmission software update today, they were told it would be released a month or so from now. This is from a dealership in Massachusetts. Ours is at 12k miles and the lurching/ roughness at low gears was getting worse compared to a few months back. It’s still drivable but when slowing to a stop , it feels like I am driving a semi or a truck sometimes. Very noticeable to passengers.

 

[nartmot]

Perfect timing. I was just wondering about this. It seems like the update is perpetually 1 month away, but I do understand the bottleneck with CARB approval and all that. Theres nothing that can slow a process down to a crawl like government bureaucracy and inefficiency, especially in 2025.

 

[BrimanSC]

Someone on Reddit mentioned their dealer said the software update came out this weekend: https://www.reddit.com/r/LexusGX550/s/kA7gbnscLh

Not sure the validity but wanted to share.

 

[nartmot]

Woot! Other members have confirmed here: Transmission Clunk TSB L-SB-0042-25