shifting with stock gears

[2005blackgt]

at what speed can i downshift my 05 into first gear

 

[SpartaPerformance]

Stopped at a light is the safest speed.

 

[STANGmole]

Depends on how cold it is...you might not be able to at all

Seriously, it says in the owner's manual. I don't think you're supposed to over 10mph.

 

['08GTcaRED]

15 actually, but there are times where I have had to go below 10 to shift. Again depends on how hot/cold it is

 

[21MsclCr]

yeah Ive been a bit higher than 10 and 15 and it didnt feel good and could hear it whine. Havent done it again since, I just go to second and I almost never go into first unless I come to a compete stop