Shift later as trans temps rise, how to fix this.

[crazyelf]

So ive been chasing a shift issue for a while now. the 2-3 shift is very inconsistent. But tonight while logging Ive noticed the transmission shifts fine while cold but as the temps start rising the shift occurs later and later until finally it will hit rev limiter.
I can post up some logs if you guys would like to see them. when the trans was around 130 degrees it was shifting about 400 rpm beyond commanded shift rpm which sounds about normal. But once it was up around 165 it wasnt shifting until about 700 rpm after set rpm.

I do expect some shift delay and the shift rpm is set at 5700 I believe.

Im thinking the pressure modifier table might help but It seems most people dont touch that.

[98tadriver]

do you have a trans cooler? I installed one on the vette' a while back and it dropped my temps about 20degrees

[crazyelf]

I do have a trans cooler, although Im thinking about mounting it in a different location. I didnt think a trans temp of 165 was bad though.

[98tadriver]

165 isnt bad at all. from what ive been told, 200 isnt bad either. i like to see it around 155-165 at the track.

i made some adjustments in the 2-3 pressure modifier table to help out with my 2-3 woes. made 15 passes last night at atco and it shifted every time. trans temps ranged from 165-180*

[crazyelf]

165 isnt bad at all. from what ive been told, 200 isnt bad either. i like to see it around 155-165 at the track.

i made some adjustments in the 2-3 pressure modifier table to help out with my 2-3 woes. made 15 passes last night at atco and it shifted every time. trans temps ranged from 165-180*

What did you set the table at? I have no idea where to start im new to this stuff

[gn2beatu]

Are your hot shift tables diff than regular ones?

[CRTD]

i would be suspect state of health with 3-4 clutch in trans. a marginal component may seem ok cold and give way when the fluid warms up.