1st gear+ OD = 5 speed ?
Thread Starter
TECH Fanatic
Joined: Jul 2022
Posts: 1,042
Likes: 392
From: Alaska
1st gear+ OD = 5 speed ? 4 solenoids in a 4L60.
What happens if we engage 1st gear clutch AND Overdrive at same time ?
1st gear + OD gets close to a 2 to one reduction ratio, fill in gap between 1st and 2nd.
5 available forward ratios.... 4L60 becomes a 5L60
Anyone done this ?
What is the down side ?
What happens if we engage 1st gear clutch AND Overdrive at same time ?
1st gear + OD gets close to a 2 to one reduction ratio, fill in gap between 1st and 2nd.
5 available forward ratios.... 4L60 becomes a 5L60
Anyone done this ?
What is the down side ?
TECH Junkie
Joined: Dec 2012
Posts: 3,618
Likes: 1,328
From: Iowa
Um
What?
I've covered this before.
The 4l60e is a 2 speed transmission with an overdrive reduction
What we call
1
2
3
4
is really
Lo
Low OD
High
High OD
Can break down the ratios if you need to see the math...but that's all that is happening
Not sure where you get the idea that there are 4 shift solenoids either
Shift sol A
Shift sol B
TCC enable
TCC Reg
3-2 downshift control
EPC
only 2 of those 4 have anything to do with what ratio is active.
What?
I've covered this before.
The 4l60e is a 2 speed transmission with an overdrive reduction
What we call
1
2
3
4
is really
Lo
Low OD
High
High OD
Can break down the ratios if you need to see the math...but that's all that is happening
Not sure where you get the idea that there are 4 shift solenoids either
Shift sol A
Shift sol B
TCC enable
TCC Reg
3-2 downshift control
EPC
only 2 of those 4 have anything to do with what ratio is active.
