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D8t transmission filter screen

Nige

Senior Member
Joined
Jun 22, 2011
Messages
30,436
Location
G..G..G..Granville.........!! Fetch your cloth.
Remind me of the calibration again. Does the process calibrate each clutch in sequence automatically or do you have to manually do it one at a time.?

#4 clutch is for 2nd speed.
Did #5 clutch calibrate OK or did the process not get that far.?
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
30,436
Location
G..G..G..Granville.........!! Fetch your cloth.
I can't see anything in the Service Manual. Does ET have any sort of diagnostic procedure for the "10C0" Error Code.?

If there is no procedure I would suggest to swap the solenoids for #4 & #5 clutches and attempt the calibration again. I cannot see anything really quick that identifies which solenoid is which. The best I can suggest is to identify each individual solenoid by the colours/numbers in the machine wire harness at the transmission control valve.

1701368067284.png
 

ahart

Senior Member
Joined
Nov 7, 2020
Messages
897
Location
Indiana
Swap them and see if problem follows or stays. No need to throw money if the problem is in the clutch and not the modulation valve.
 

Mobiltech

Senior Member
Joined
Jan 14, 2014
Messages
1,741
Location
Sask.
Occupation
Self employed Heavy duty mechanic
I would suggest if it comes to a rebuild you should replace all of the modulation valves anyway because they are a common failure point.
 

Franklin7

Well-Known Member
Joined
Jun 14, 2023
Messages
46
Location
Naches wa
I swapped #4 and 5 no difference. Failed to calibrate clutch #4. When it's trying to calibrate #4 I can feel it like it's trying to engage. Like a jolt every few seconds. #1-3 doesn't do that.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
30,436
Location
G..G..G..Granville.........!! Fetch your cloth.
When it's trying to calibrate #4 I can feel it like it's trying to engage.
That’s the ECM commanding the modulation valve to increase pressure to the #4 clutch until it sees the necessary speed change to confirm that the clutch has engaged. If it doesn’t see that speed change by the time the connanded pressure has reached X psi the calibration falls over. That’s what yours is doing.
 
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