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10speed Tranny, weird

oncewas
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oncewas Enthusiast

oncewas

Posted
Posted

Hi guys, 

Just something I found a little strange and I'm not sure why GM did this way. I had a 2019 Ford Mustang GT that I traded in for my 2024 GMC Sierra. Both have the 10Speed transmission. The difference that I find I don't like on this one is I have to be in Low to use the paddles to shift. In the GT I could shift in Drive or Sport. Don't remember it having a Low. The only difference in Sport and Drive was in Drive it would shift itself if the RMP's got to high while in Sport it would not shift unless you made it. I find I liked that better than having to shift to Low to use the paddles. Just me two cents.

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
13 hours ago, oncewas said:

Hi guys, 

Just something I found a little strange and I'm not sure why GM did this way. I had a 2019 Ford Mustang GT that I traded in for my 2024 GMC Sierra. Both have the 10Speed transmission. The difference that I find I don't like on this one is I have to be in Low to use the paddles to shift. In the GT I could shift in Drive or Sport. Don't remember it having a Low. The only difference in Sport and Drive was in Drive it would shift itself if the RMP's got to high while in Sport it would not shift unless you made it. I find I liked that better than having to shift to Low to use the paddles. Just me two cents.

 

 

 

"L" mode is just a gear limiter.  Been this way in the trucks since 2007 when they introduced the 6 speeds.  It is not direct shifting in L like M would be in a Mustang or Camaro with the 10 speed or even the F150 with 10 speed.  

 

In the GM trucks its more just a gear limiter.  You can lock out gears so L8 will shift 1 through 8 on its own and not use 9th or 10th.  You can downshift it though, and that's about it.  Not sure why GM didn't make their manual mode (which has been on since the 6 speeds) have direct control of gear shifts instead of just being a limiter on upshifts and then controlling downshifts.  

Edited by newdude
GETGONE Enthusiast

GETGONE

Posted
Posted

The 10 speeds were a joint venture between GM and Ford but they each did their own electronic tuning. They are mostly the same but do have a few unique parts to them. I knew all about them when they initially came out but have since forgotten most of it.

  • 2 weeks later...
Transient Senior Enthusiast

Transient

Posted
Posted
On 4/3/2025 at 11:01 PM, GETGONE said:

The 10 speeds were a joint venture between GM and Ford but they each did their own electronic tuning. They are mostly the same but do have a few unique parts to them. I knew all about them when they initially came out but have since forgotten most of it.

Iirc, valve bodies are thy biggest difference

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