Help with 4l80
05-19-2009, 09:48 PM
#1
Teching In
Thread Starter
Join Date: May 2009
Location: Alabaster AL
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Help with 4l80 I need advice on a 4l80e. Some info about the car turbo sbc 4l80 trans with a TCI controller and 3.08 gears. It does not want to shift out of first gear when it is told to ( I have checked the controller ). It will shift 2-3 fine and 3-4 fine. If I am light on the gas it will shift. I have changed both speed sensors and the ttc because it didnt ohm out. Solenoids a and b both ohm out good. Thanks for any help and great site by the way
05-19-2009, 10:06 PM
#3
Teching In
Thread Starter
Join Date: May 2009
Location: Alabaster AL
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Is this some thing that can just happen? I drove it home from the dyno 30 plus miles and all was fine later in the day I get in it to drive it to the cruise in and its doing this. Is this some thing in the valve body or deeper in the trans. Thanks help
05-19-2009, 10:25 PM
#5
Teching In
Thread Starter
Join Date: May 2009
Location: Alabaster AL
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
I did not but I am get mph reading on the dashboard and part throttle shift table. I wasnt getting one on part throttle but now I do after the new sensor.
05-22-2009, 01:39 AM
#7
More info,
is it modded? VB kit?
Does it only do it at WOT or near WOT?
1-2 shift valve defaults to 2nd gear, so for it to not shift when the controller is commanding it you have:
1: Some idiot drilled the solenoid feed hole.
2: Solenoid is plugged up and not exhausting properly.
3: Excess pressure building up on the downshift side of the 1-2 shift valve, could be caused by VB mods or pump mods.
4: Weak or broken 1-2 shift valve spring.
is it modded? VB kit?
Does it only do it at WOT or near WOT?
1-2 shift valve defaults to 2nd gear, so for it to not shift when the controller is commanding it you have:
1: Some idiot drilled the solenoid feed hole.
2: Solenoid is plugged up and not exhausting properly.
3: Excess pressure building up on the downshift side of the 1-2 shift valve, could be caused by VB mods or pump mods.
4: Weak or broken 1-2 shift valve spring.
Trending Topics
05-22-2009, 06:25 AM
#8
Teching In
Thread Starter
Join Date: May 2009
Location: Alabaster AL
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
More info,
is it modded? VB kit?
Does it only do it at WOT or near WOT?
1-2 shift valve defaults to 2nd gear, so for it to not shift when the controller is commanding it you have:
1: Some idiot drilled the solenoid feed hole.
2: Solenoid is plugged up and not exhausting properly.
3: Excess pressure building up on the downshift side of the 1-2 shift valve, could be caused by VB mods or pump mods.
4: Weak or broken 1-2 shift valve spring.
is it modded? VB kit?
Does it only do it at WOT or near WOT?
1-2 shift valve defaults to 2nd gear, so for it to not shift when the controller is commanding it you have:
1: Some idiot drilled the solenoid feed hole.
2: Solenoid is plugged up and not exhausting properly.
3: Excess pressure building up on the downshift side of the 1-2 shift valve, could be caused by VB mods or pump mods.
4: Weak or broken 1-2 shift valve spring.
If i have it in 3rd when I pull out when it commands it to shift to 2nd if I shift the selector to 2nd it will shift
Dont know about the solenoid the trans has worked perfect for 6 years
I am going to check line pressure as soon as I find a guage