r/Cadillac • u/jhoke1017 • 2d ago

How has GM not fixed the 10-speed?

I genuinely don’t understand how this transmission is so bad? I had the dreaded valve body issue, and instead of waiting on a list 3500 deep, I got a full OEM transmission swap as I am still under warranty.

The new one still occasionally lurches when downshifting, and consistently hunts for gears.

How has GM stayed competitive when their transmissions are just….bad? Even my Ford with the same 10 speed is significantly better.

17 Upvotes

90% Upvoted

49 comments sorted by

View all comments

2

u/OldheadBoomer 2d ago

Mine's acting up, 2023 CT4-V. A few days ago, I was driving under 40, let off the gas, and felt it hesitate like I touched the brakes. A few seconds later, it spit out a check engine light and "Reduced acceleration mode" and stayed in 5th gear.

I got home and parked; it was very clunky going into reverse. An hour later, I went out and started it, and took it for a test drive. The check engine light was still on, but it drove normally. I pulled the codes using an OBD II scanner and got a P0700 and P0747.

I have an appointment on the 17th. It's still doing okay, hopefully it will stay that way for a couple more weeks.

2

u/Particular_Apple_652 1d ago

It’s going to be the valve body and the wait is now approx 3500 customers last I heard so probably more now…gotta pressure the dealer to replace the whole transmission…it’s not still in limp mode?

1

u/OldheadBoomer 1d ago

it’s not still in limp mode?

Nope. I left it for an hour, started it up and it was back to normal, but with the check engine light illuminated. After a couple of drives, it went out.