CTS Vsport Got a New $4500 Transmission... 

Kinja'd!!! by "Expo2k" (Expo2k)
Published 12/13/2017 at 01:45

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STARS: 1


Under warranty, thank goodness! It’s the AA80E/Aisin TL-80SN 8-speed that got put into the Lexus LS460 and is still used today in the RS-F/GS-F/IS-F. What are the odds?

Of course GM got their dirty meat hooks on it which probably ruined it. “Upgrades to the transmission, which AW had been producing prior to the 2014 GM applications, include additional heat-treatments on gear sets and other internal components, and additional clutch plates” (articles.sae.org/11942).

The tech report below tells the whole story. What’s a “TAC,” though?

Kinja'd!!!


Replies (16)

Kinja'd!!! "AestheticsInMotion" (aestheticsinmotion)
12/13/2017 at 02:01, STARS: 0

Transmission actuator coupling

Kinja'd!!! "Expo2k" (Expo2k)
12/13/2017 at 02:31, STARS: 1

“Oh, magic transmission actuator coupling, can the customer have a new transmission?”

Kinja'd!!!

Kinja'd!!! "CompactLuxuryFan" (compactluxury)
12/13/2017 at 02:41, STARS: 1

So it wasn’t actually the diff at all? Then how did both the wheels lock? LSD? Rear-mounted transaxle with a built-in diff? 

Kinja'd!!! "You can tell a Finn but you can't tell him much" (youcantellafinn)
12/13/2017 at 02:46, STARS: 1

Technical Assistance, Corporate would be my guess.

Kinja'd!!! "Expo2k" (Expo2k)
12/13/2017 at 03:01, STARS: 0

Yeah, the eLSD I guess. Pretty wild that it would go into full lockup on decel, but the car does work fine now. ¯\_()_/¯ 

Kinja'd!!! "pip bip - choose Corrour" (hhgttg69)
12/13/2017 at 06:05, STARS: 4

TAC is the General Motors Technical Assistance Centre, only contactable by certain GM dealer staff.

i work at a GM dealer here in Australia. Holden have their own TAC staff as well.

Kinja'd!!! "shop-teacher" (shop-teacher)
12/13/2017 at 07:09, STARS: 3

If the trans locks up, everything downstream from the trans will lock up too.

Kinja'd!!! "Expo2k" (Expo2k)
12/13/2017 at 07:45, STARS: 0

Cool! I thought it might be the case, but never imagined that existed!

Kinja'd!!! "You can tell a Finn but you can't tell him much" (youcantellafinn)
12/13/2017 at 20:02, STARS: 0

Not necessarily. I’ve seen trucks that were in park sliding/rolling down a slippery hill with one tire rolling and the other tire sliding while spinning the wrong way.

Kinja'd!!! "CaptDale - is secretly British" (captdale)
12/14/2017 at 12:41, STARS: 0

Do you?! I work at a GM dealer here in California

Kinja'd!!! "pip bip - choose Corrour" (hhgttg69)
12/14/2017 at 15:54, STARS: 1

Yep

Ballarat Holden & Skoda and audi centre Ballarat

Kinja'd!!! "CaptDale - is secretly British" (captdale)
12/14/2017 at 16:26, STARS: 0

Cool, we are Rancho Grande Motors in San Luis Obispo (GMC, Buick, Cadillac, Subaru, and Hyundai)

You have an interesting mixture of car lines

Kinja'd!!! "pip bip - choose Corrour" (hhgttg69)
12/14/2017 at 18:25, STARS: 0

We used to have Subaru before Skoda

Kinja'd!!! "CaptDale - is secretly British" (captdale)
12/14/2017 at 18:39, STARS: 0

Which do you prefer?

Being the only Subaru dealer in 200 miles makes our job fairly easy. It is hard to decided which is better between dealing with Subaru or GM. But let me tell you right now Hyundai is the fucking worst. Everything from their customers to their cars to their parts help lines etc.  

Kinja'd!!! "pip bip - choose Corrour" (hhgttg69)
12/14/2017 at 21:35, STARS: 1

Holden by far is better

Kinja'd!!! "CaptDale - is secretly British" (captdale)
12/15/2017 at 11:07, STARS: 0

Hmm, interesting.