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Fireball5657
I'm Awesome
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From
Choctaw, Oklahoma
Joined
Aug 17, 2020
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Yesterday at 11:52 PM
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Fireball5657
replied to the thread
Vicious 1-2 Shift on 4L60E.
.
Update: New PCM installed, PROM swapped, absolutely nothing changed. Still shifts crazy hard 1-2. I may try testing the EPC solenoid...
Jul 13, 2023
Fireball5657
replied to the thread
Vicious 1-2 Shift on 4L60E.
.
Not sure of the part number, the inside spring was green and the outside spring was black. I didn't touch anything else, and I'm not...
Jul 13, 2023
Fireball5657
replied to the thread
Vicious 1-2 Shift on 4L60E.
.
I just wanted to update the thread with some more information I've found. Inside the transmission is an EPC solenoid. From what I've...
Jul 11, 2023
Fireball5657
replied to the thread
Vicious 1-2 Shift on 4L60E.
.
Right, when you drop the accumulator housing, the Sonnax piston is on top, underneath that is the two springs, then the ball bearing...
Jul 11, 2023
Fireball5657
replied to the thread
Vicious 1-2 Shift on 4L60E.
.
Interesting, I had no idea that these early 4L60E's had adaptive shift patterns. I don't think the adaptations have ever been changed...
Jul 10, 2023
Fireball5657
posted the thread
Vicious 1-2 Shift on 4L60E.
in
Transmissions
.
Hey all, I've got an extremely rough 1-2 shift on my 4L60E and it's making the truck nearly undriveable. The truck is the GMT400 in my...
Jul 10, 2023
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